Free Online Test Paper IES UPSC Mechanical Engineering P2 2007

Free Online Objective Test Paper IES UPSC Mechanical Engineering P2 2007
These questions appeared in IES 2007.This is totally free objective test.To download select the text and save in Word or Text.
1. Which one of the following metal forming processes is not a high energy rate
forming process ?
(a) Electro-magnetic forming (b) Roll-forming
(c) Explosive forming (d) Electro-hydraulic forming

2. What are the advantages of powder metallurgy ?
1. Extreme purity product
2. Low labour cost.
3. Low equipment cost.
Select the correct answer using the code given below:
(a) 1,2 and 3 (b) land 2 only
(c) 2 and 3 only (d) 1 and 3 only

3. Match List I with List II and select the correct answer using the code given below

the Lists:
List I (Casting Process)
A. Die casting
B. Investment casting
C. Shell moulding
D. Centrifugal casting
Code:

List II (Principle)
1. The metal solidifies in a rotating mould
2. The pattern cluster is repeatedly dipped into a ceramic slurry and dusted with refractory
3. Molten metal is forced by pressure into a metallic mould
4. After cooling the invest is removed from the casting by pressure jetting or vibratory cleaning

A B C D
(a) 2 1 3 4
(b) 3 4 2 1
(c) 2 4 3 1
(d) 3 1 2 4


4. Consider the following statements in respect of investment castings:
1. The pattern or patterns is/are not joined to a stalk or sprue also of wax to form a tree of patterns.
2.
The prepared moulds are placed in an oven and heated gently to dry off the invest and melt out the bulk of wax.
3.
The moulds are usually poured by placing the moulds in a vacuum chamber.
Which of the statements given above are correct ?
(a) 1 and 2 only (b) 1 and 3 only
(c) 2 and 3 only (d) 1, 2 and 3


5 Which of the following are employed in shell moulding ?
1. Resin binder
2. Metal pattern
3. Heating coils
5 Select the correct answer using the code given below:
(a) 1 and 2 only (b) 1 and 3 only
(c) 2 and 3 only (d) 1,2 and 3

6. Wh ich one of the following is the correct statement ?
In a centrifugal casting method
(a) no core is used (b) core may be made of any metal
(c) core is made of sand (d) core is made of ferrous metal

7. Which one of the following is the correct statement ?
Gate is provided in moulds to
(a) feed the casting at a constant rate
(b) give passage to gases
(c) compensate for shrinkage
(d) avoid cavities

8. Consider the following statements in respect of oxy-acetylene welding:
1. The joint is not heated to a state of fusion.
2. No pressure is used.
3. Oxygen is stored in steel cylinder at a pressure of 14 MPa.
4. When there is an excess of acetylene used, there is a decided change in the appearance of flame.
Which of the statements given above are correct ?
(a) 1, 2 and 3 (b) 2, 3 and 4
(c) 1, 3 and 4 (d) 1, 2 and 4

9. The coating material of an arc welding electrode contains which of the following
1. Deoxidising agent
2. Arc stabilizing agent
3. Slag forming agent
Select the correct answer using the code given below:
(a) 1, 2 and 3 (b) 1 and 2 only
(c) 2 and 3 only (d) 1 and 3 only

10. In MIG welding, the metal is transferred into the form of which one of the following ?
(a) A fine spray of metal (b) Molten drops
(c) Weld pool {d) Molecules

Consider the following statements in respect of the laser beam welding:
1. It can be used for welding any metal or their combinations because of very high temperature of the focal points.
2. Heat affected zone is very large because of quick heating.
3. High vacuum is required to carry the process.
Which of the statements given above is/are correct ?
(a) 1 and 2 only (b) 2 and 3 only
(c) 1 only (d) 1, 2 and 3

11. Which of the following effects are possible due to residual stresses in welding ?
1. Reduce dimensional stability.
2. Weld cracking.
3. Effect on fatigue strength.
4. Reduction in the creep strength.
Select the correct answer using the code given below:
(a) 1 and 2 only (b) 2 and 3 only
(c) land 3 only id) 1, 2, 3 and 4

12. During machining, excess metal is removed in the form of chip as in the case of
turning on a lathe. Which of the following are correct ?
Continuous ribbon like chip is formed when turning
1. at a higher cutting speed
2. at a lower cutting speed
3. a brittle material
4. a ductile material

Select the correct answer using the code given below:
(a) l and 3 (b) l and 4
(c) 2 and 3 (d) 2 and 4


13. Screw threads are produced on solid rods by using which of the following ?
(a) Dies (b) Punch
(c) Mandrel (d) Boring bar

14. What is the process ofremoving metal by a milling cutter which is rotated against
the direction of travel of the work piece, called ?
(a) Down milling (b) Up milling
(c) End milling (b) Face milling


15. Match List I with List II and select the correct answer using the code given below
the Lists :
List I List II
(Long Column)
A. Both ends hinged
B. One end fixed and other
end free
C. Both ends fixed
D. One end fixed, and other
hinged
Code:
A B C D
(a) 2 1 4 3
(b) 4 1 2 3
(c) 2 3 4 1
(d) 4 3 2 1

16. Which one of the following is the correct ascending order of packing density for
the given crystal structures of metals ?
(a) Simple cubic - Face centred cubic - Body centred cubic
(b) Body centred cubic - Simple cubic ~ Face centred cubic
(c) Simple cubic - Body centred cubic - Face centred cubic
(d) Body centred cubic — Face centred cubic - Simple cubic

17. Vibration damping in machinery is best achieved by means of base structures
made of which one of the following materials ?
(a) Low carbon steel (6) Nodular iron
(c) Grey cast iron (d) White cast iron


18. Match List I with List II and select the correct answer using the code given below
the Lists:
List I List II
(Component) (Required Property)
A. Blades of bulldozer 1. High wear resistance and high toughness
B. Gas turbine blades 2. Low Young's modulus and high fatigue
strength
C. Drill bit 3. High wear and abrasion
D. Springs of automobiles 4. High creep strength and good corrosion
resistance

Code:

A B C D
(a) 3 2 1 4
(b) 1 4 3 2
(c) 3 4 1 2
(d) 1 2 3 4

19. What is the movement of block of atoms along certain crystallographic planes and
directions, termed as ?
(a) Glide (b) Twinning
(c) Slip (d)Jog

20. Which one of the following is the correct statement f
Pearlite in iron-carbon system is a
(a) phase consisting of ferrite and cementite at room temperature (6) Mechanical mixture of ferrite and cementite at room temperature (c) eutectic mixture of ferrite and cementite at room temperature {d) All the above three are correct

21. Which of the following factors influence hardness in a plain carbon steel ?
1. Percentage carbon
2. Quenching media
3. Work size
Select the correct answer using the code given below:
(a) 1 and 2 only (b) 2 and 3 only
(c) l and 3 only (d) 1,2 and 3

22. Match List I with List II and select the correct answer using the code given below

the Lists.
List I List II
(Material) (Application)
A. Fibre reinforce plastics 1. Automobile tyres
B. Acryli les 2. Aircraft
C. Phenolics 3. Lenses
D. Butadiene rubber 4. Electric switch cover
Code :
A B C D
(a) 1 4 3 2
(b) 2 3 4 1
(c) 1 3 4 2
(d) 2 4 3 1

23. Which one of the following is the most effective strengthening mechanism of non-
ferrous metal ?
(a) Solid solution hardening (b) Strain hardening
(c) Grain size refinement (d) Precipitation hardening

24. Wood is natural composite consisting of which of the following ?
(a) Lignin fibers in collagen matrix
(b) Lignin fibers in apatite matrix
(c) Cellulose fibres in apatite matrix
(d) Cellulose fibres in lignin matrix

25. Which one of the following is not a ceramic ?
(a) Alumina (b) Porcelain
(c) Whisker (d) Pyrosil

26. Cutting tool material 18-4-1 HSS has which one of the following compositions ?
(a) 18% W, 4% Cr, 1% V (b) 18% Cr, 4% W, 1% V
(c) 18% W, 4% Ni, 1% V (d) 18% Cr, 4% Ni, 1% V

27. Which one of the following elements alloys exhibits season cracking ?
(a) Iron (6) Brass
(c) Aluminium (d) Steel


28. Which metal forming process is used for manufacture of long steel wire ?
(a) Deep drawing (b) Forging
(c) Drawing (d) Extrusion

29. Which one of the following is the correct statement ?
(a) Extrusion is used for the manufacture of seamless tubes
(b) Extrusion is used for reducing the diameter of round bars and tubes rotating dies which open and close rapidly on the work
(c) Extrusion is used to improve fatigue resistance of the metal by setting up compressive stresses on its surface
(d) Extrusion comprises pressing the metal inside a chamber to force it out by high pressure through an orifice which is shaped to provide the desired from the finished part

30. Interference between the teeth of two meshing involute gears can be reduced oreliminated by
1. Increasing the addendum of the gear teeth and correspondingly reducing the addendum of the pinion.
2. reducing the pressure angle of the teeth of the meshing gears
3. increasing the centre distance
Which of the statements given above is/are correct ?
(a) 1 and 2 (b) 2 and 3
(c) 1 only (d) 3 only

31. Which one of the following is the correct statement ?
In meshing gears with involute gear teeth, the correct begins at the intersection of the
(a) line of action and the addendum circle of the driven gear
(b) line of action and the pitch circle of the driven gear
(c) dedendum circle of the driver gear and the addendum circle of the driven gear
(d) addendum circle of the driver gear and the pitch circle of the driven gear

32. The turning moment diagram for a single cylinder double acting steam engine
consists of+ve and -ve loops above the below the average torque line. For the +ve
loop, the ratio of the speeds of the flywheel at the beginning and the end is which
one of the following
(a) Less than unity (b) Equal to unity
(c) Greater than unity (d) Zero

33. In a slider-bar mechanism, when does the connecting rod have zero angular ve
locity ?
(a) When crank angle = 0° (b) When crank angle = 90°
(c) When crank angle = 45° (d) Never


34. Consider the following follower motions in respect of a given lift, speed of rotation
and angle of stroke of a cam:
1. Cycloidal motion.
2. Simple harmonic motion.
3. Uniform velocity motion.


35. In order for a transportation matrix which has six rows and four columns not to
be degenerate, how much must be the number of allocated cells in the matrix ?
(a) 6 (b) 9
(c) 15 (d) 24


36. Which one of the following causes the whirling of shafts ?
(a) Non-homogeneity of shaft material
(b) Misalignment of bearings
(c) Fluctuation of speed
(d) Internal damping

37. Which one of the following is the correct statement ?
In the standard form of a linear programming problem, all constraints are (a) of less than or equal to, type (b) of greater than or equal to , type
(c) in the form of equations
(d) some constraints are of less than equal to, type and some of greater than equal to, type

38. Ifm is the number of constraints in a linear programming with two variables x
and y and non-negativity constraints x>0,y>0; the feasible region in the graphi
cal solution will be surrounded by how many lines ?
(a) m (b) m + 1
(c) m + 2 (d) m + 4

39. Which one of the following is not the characteristics of acceptance sampling ?
(a) This is widely suitable in mass production (b) It causes less fatigue to inspectors
(c) This is muen economical
(d) It gives definite assurance for the conformation of the specifications for all the pieces

40. Which one of the following subroutines does a computer implementation of the
simplex routine require ?
(a) Finding a root of a polynomial
(b) Solving a system of linear equations
(c) Finding the determinant of a matrix
(d) Finding the eigenvalue of a matrix

41, Match List I with List II and select the correct answer using the code given below Lists:
List I List II
(Application) (Joint)

A. Boiler Shell 1, Cotter Joint
B. Marine Shaft Coupling 2. Knuckle Joint
C. Crosshead and Piston Rod 3. Riveted joint
D. Automobile gear box 4. Splines
(gears to shaft) 5. Bolted Joint
Code :
A B C D
(.a) 1 4 2 5
(b) 3 5 1 4
(c) 1 5 2 4
(d) 3 4 1 5


42. How can shock absorbing capacity of a bell be increased ?
(a) By tightening it properly
(6) By increasing the shank diameter
(c)By grinding the shank
(d)By making the shank diameter equal to the core diameter of thread

43. How is the type of a railway wheel fitted ?
(a) By seam welding (6) By fillet welding
(c) By interference fit (d) None of the above

44. Consider the following statements in case of belt drives:
1. Centrifugal tension in the belt increases the transmitted power.
2. Centrifugal tension does not affect the driving tension.
3. Maximum tension in the belt is always three times the centrifugal tension. Which of the statements given above is/are correct ?
(a) 1, 2 and 3 (6) 2 and 3
(c) 1 and 3 only (d) 1 only

45.Match List I with List II and select the correct answer using the code given below the Lists:
List I List II
A. Worm gear 1. Imposes no thrust load on the shaft
B. Spur gear 2. To transmit power between two non-inter-
secting shafts which are perpendicular
C. Herringbone 3. lb transmitpower when the shafts are parallel
D. Spiral level gear 4. To transmit power when the shafts are at
right angles to one another
Code :
A B C D
(a) 1 2 3 4
(b) 2 3 1 4
(c) 1 2 4 3
(d) 2 3 4 1

46. The velocity ratio between pinion and gear in a gear drive is 2-3, the module of
teeth is 2-0 mm and sum of number of teeth on pinion and gear is 99. What is the
centre distance between pinion and the gear ?
(a) 49. 5 mm (6) 99 mm
(c) 148.5 mm (d) 198 mm

47. Compared tc years with 20°pressure angle involute full depth teeth, those with 20°pressure angle and stub teeth have
1. smaller addendum.
2. smaller dedendum.
3. smaller tooth thickness.
4. greater bending strength.
Which of the statements given above are correct ?
(a) 1,2 and 3 (6) 1, 2 and 4
(c) 1, 3 and 4 (d) 2, 3 and 4

48. An hollow shaft of outer dia 40 mm and inner dia of 20 mm is to be replaced by a solid shaft to transmit the same torque at the same maximum stress. What should
be the diameter of the solid shaft ?
(a) 30 mm (b) 35 mm
(c) 10x(60)1/3mm (d) 10x(20)1/3mm

49. What is the direction of the Coriolis component of acceleration in a slotted lever-
crank mechanism ?
(a) Along the sliding velocity vector
(6) Along the direction of the crank
(c) Along a line rotated 90° from the sliding velocity vector in a direction opposite to the angular velocity of the slotted lever
(d) Along a line rotated 90° from the sliding velocity vector in a direction same as that of the angular velocity of the slotted lever

50. The controlling force curves for a spring-controlled governor are shown if the above figure. Which curve represents a stable governor ?
(a) 1 (b) 2
(c) 3 (d) 4


51. For a governor running at constant speed, what is the value of the force acting on
the sleeve ?
(a) Zero (6) Variable depending upon the load
(c) Maximum (d) Minimum


52 A motion is aperiodic at what value of the damping factor ?
(a) 1. 0 or above (6) 0. 5
(c) 0. 3 (d) 0. 866

53 Which one of the following statements relating to belt drives is correct ?
(a) The rotational speeds of the pulleys are directly proportional to their diameters
(6) The length of the crossed belt increases as the sum of the diameters of the pulleys increases
(c) The crowning of the pulleys is done to make the drive sturdy
d) The slip increases the velocity ratio


54. Under service conditions involving jarring, vibration and pulsation of the
working load, the bolt of choice would be a
(a) short bolt with high rigidity (b) long bolt with increased elasticity
(c) bolt wiht a dished washer (d) bolt with castle nut

55. Gearing contact is which one of the following ?
(a) Sliding contact
(6) Sliding contact, only rolling at pitch point
(c) Rolling contact
(d) Rolling and sliding at each point of contact


Directions:
The next 4 (Four) items consist of two statements; one labelled as the 'Assertion(A)' and the other as 'Reason (R)\ You are to examine these two statements carefully and select the answers to these items using the code given below :
Codes:
(a) Both A and Rare individually true and R is correct explanation of A
(b) Both A and R are individually true but R is not the correct explanation of A
(c) A is true but R is false (d) A is false but R is true


56. Assertion (A) : For drilling cast iron, the tool is provided with a point angle smaller than
that required for a ductile material. Reason (R) : Smaller point angle results in lower rake angle.


57. Assertion (A) : Greater force on the plunger is required in case of direct extrusion then
indirect one. Reason (R) : In case of direct extrusion, the direction of the force applied on the plunger and the direction of the movement of the extruded metal are the same.


58. Assertion (A): In a multispindle automatic lathe, the turret tool holder is indexed to
engage the cutting tools one by one for successive machining operations.
Reason (R) : Turret is a multiple tool holder so that for successive machining operation, the tools need not be changed.

59. Assertion (A) : Value engineering is a technique applied to compete in the market only
at the time of introduction of a product or service. Reason (R) : Increasing the functional worth of a product appreciably, keeping the cost almost constant, is the real objective of value engineering.

60. Consider the following statements:
In a thick walled cylindrical pressure vessel subjected to internal pressure, the tangential and radial stresses are
1. minimum at outer side
2. minimum at inner side
3. maximum at inner side and both reduce to zero at outer well
4. maximum at inner wall but the radial stress reduces to zero at outer wall Which of the statements given above is/are correct ?
(a) l and 2 (6) l and 3
(c) 1 and 4 (d) 4 only

61. Which one of the following statements is correct ?
If a helical spring is halved in length, its spring stiffness
(a) remains same (b) halves
(c) doubles (d) triples '

62 . Which one of the following statements is correct ?
When a rectangular section beam is loaded transversely along the length, shear stress develops on
(a) top fibre of rectangular beam
(6) middle fibre of rectangular beam
(c) bottom fibre of rectangular beam
(d) every horizontal plane


63. Which one of the following statements is correct ?
A beam is said to be of uniform strength, if
(a) the bending moment is the same throughout the beam (6) the shear stress is the same throughout the beam
(c) the deflection is the same throughout the beam
(d) the bending stress is the same at every section along its longitudinal axis

64. A cantilever beam of 2 m length supports a triangularly distributed load over its
entire length, the maximum of which is at the free end. The total load is 37-5 kN.
What is the bending moment at the fixed end ?
(a) 50 x 106 N mm (b) 12. 5 x 106 N mm
(c) 100 x 106 N mm (d) 25 x 106 N mm

65. Which one of the following statements is correct ?
If a material expands freely due to heating, it will develop
(a) thermal stress (b) tensile stress
(c) compressive stress (d) no stress

66. What is the phenomenon of progressive extension of the material i.e., strain increasing with the time at a constant load, called ?
(a) Plasticity (b) "Yielding
(c) Creeping (d) Breaking

67. What are the materials which show direction dependent properties, called ?
(a) Homogeneous materials (6) /Viscoelastic materials
(c) Isotropic materials (d) Anisotropic materials

68. If the ratio G/E (G = Rigidity modulus, E = Young's modulus of elasticity) is 0>4,
then what is the value of the Poisson ratio ?
(a) 0.20 (b) 0.25
(c) 0.30 (d) 0.33

69 Increase in values of which of the following results in an increase of the coeffi
cient of friction in a hydrodynamic bearing ?
1. Viscosity of the oil.
2. Clearance between shaft and bearing.
3. Shaft speed.
Select the correct answer using the code given below:
(a) 1 and 2 only (6) 1 and 3 only
(c) 2 and 3 only (d) 1, 2 and 3

70. Consider the following statements:
For a journal rotating a bearing under film lubrication conditions, the frictional resistance is
1. proportional to the area of contact
2. proportional to the viscosity of lubricant
3. propoi tional to the speed of rotation
4. independent of the pressure
Which of the statements given above are correct ?
(a) 1, 2, 3 and 4 (b) 1 and 4 only
(c) 2, 3 and 4 only (d) 2 and 3 only

71. Consider the following statements:
1. is a modification of moving average method
2. is a weighted average of past observations
3. assigns the highest weightage to the most recent observation Which of the statements given above are correct ?
(a) 1,2 and 3 (b) l and 2 only
(c) 2 and 3 only (d) 1 and 3 only

72. Consider the following statements:
Scheduling
1. is a general timetable of manufacturing
2. is the time phase of loading
3. is loading all the work in process on machines according to their capacity Which of the statements given above are correct ?
(a) 1,2 and 3 (6) land 2 only
(c) 2 and 3 only (d) land 3 only

73. In an assembly line, what is the balance delay ?
(a) Line efficiency x 100 (b) 100 - Line efficiency (in percentage)
Line efficiency / 100
(c) (a) None of the above

74. If the fixed cost of the assets for a given period doubles, then how much will the
break-even quantity become ?
(a) Half the original value (6) Same as the original value
(c) Twice the original value (d) Four times the original value

75. Match List-I with List-II and select the correct answer using the code given below
the Lists:
List I (Term)
A. Dummy activity
B. Critical path
C. PERT activity
D. Critical path method
Code:
A B C D
(a) 3 4 1 2
(b) 4 2 3 1
(c) 3 4 2 1
(d) 4 2 1 3
List II
(Characteristics)
1. Follows (3 distribution
2. It is built on activity-oriented diagram
3. Constructed only to establish sequence
4. Has zero total slack

76. Consider the following statements:
PERT considers the following time estimates
1. Optimistic time 2. Pessimistic time 3. Most likely time
Which of the statements given above are correct ?
(a) 1,2 and 3 (b) l and 2 only
(c) 3 only (d) l and 3 only

77. Which one of the following statements in not correct ?
(a) PERT is probabilistic and CPM is deterministic
(b) In PERT, events are used and in CPM activities are used
(c) In CPM, the probability to complete the project in a given time-duration is calculated
(d) In CPM crashing is carried out

78. Which of the following are the benefits of inventory control ? .
1. Improvement in customers relationship.
2. Economy in purchasing.
3. Elimination of the possibility of duplicate ordering. Select the correct answer using the code given below: (a) 1, 2 and 3 (6) 1 and 2 only
(c) 2 and 3 only (d) 1 and 3 only

79. Match List-I with List-II and select the correct answer using the code given below
the Lists:
List I
A. Procurement cost
B. Carrying cost
C. Economic order quantity
D. Reorder point
Code:
A B C D
(a) 3 1 4 2
(b) 3 4 1 2
(c) 2 1 4 3
(d) 2 4 1 3
List II
1. Cost of holding materials
2. Cost of receiving order
3. Procurement lead time
4. Break-even analysis

80. In the EOQ model, if the unit ordering cost is doubled, the EOQ
(a) Is halved (6) Is doubled
(c) Increases 1.414 times (d) Decreases 1.414 times

81. Consider the following statements:
1. In C language, both data and the function that operate on that data are combined into a single unit called object.
2. Almost every correct statement in C is also a correct statement in C++, al though the reverse is not true.
Which of the statements given above is/are correct ?
(a) 1 only (6) 2 only
(c) Both 1 and 2 (d) Neither 1 nor 2


82. Which of the following methods are gear generating processes ?
1. Gear shaping 2.Gear hobbing 3. Gear milling
Select the correct answer using the code given below:
(a) 1, 2 and 3 (6) 1 and 2 only
(c) 2and3 only (d) land3 only

83. Among the following machining processes, which can be used for machining flat
surfaces ?
1. Shaping 2. Milling 3. Broaching
Select the correct answer using the code given below:
(a) 1 and 2 only (6) 1 and 3 only
(c) 2 and 3 only (d) 1,2 and 3

84.What are the main components of an NC machine ?
1. Part program 2. Machine Control Unit 3. Servo meter Select the correct answer using the code given below:
(a) 1,2and3 (6) land2only
(c) 2 and 3 only (d) land 3 only


85. Flank wear occurs mainly on which of the following ?
(a) Nose part and top face
(b) Cutting edge only
(c) Nose part, front relief face, and side relief face of the cutting tool
(d) Face of the cutting tool at a short distance from the cutting edge

86. Which of the following are the machinability criteria ?
1, Tool life 2. Cutting forces 3, Surface finish
Select the correct answer using the code given below:
(a) 1, 2 and 3 (o) 1 and 2 only
(c) 1 and 3 only (d) 2 and 3 only

87. In strain gauge dynamometers, the use of how many active gauges makes the
dynamometer more effective ?
(a) Four (6) Three
(c) Two (d) One

88. For increasing the material removal rate in turning, without any constraints,
what is the right sequence to adjust the cutting parameters ?
1. Speed 2. Feed 3. Depth of cut
Select the correct answer using the code given below:
(a) 1-2-3 (6) 2-3-1
(c) 3-2-1 (d) 1-3-2


89. Consider the following statements in relation to the unconventional machining
processes:
1. Different forms of energy directly applied to work piece to have shape trans formation or material removal from work surface.
2. Relative motion between the work and the tool is essential.
3. Cutting tool is not in physical contact with work piece.
Which of the statements given above are correct:
(a) land 2 only (6) 1,2 and 3
(c) 2 and 3 only (d) 1 and 3 only

90. According to the principle of location in jigs and fixtures, how many degrees of
freedom are to be eliminated to have a body fixed in space ?
(a) 3 (b) 4
(c) 5 id) 6

91.What is the dominant direction of the tool marks or scratches in a surface texture
having a directional quality, called ?
(a) Primary texture (6) Secondary texture
(c) Lay {d) Flaw


92. Which one of the following is not a purpose of long-term forecasting ?
(a) To plan for the new unit of production
(6) To plan the long-term financial requirement
(c) To make the proper arrangement for training the personnel
(d) To decide the purchase programme


93. Consider the following statements relating to forecasting :
1. The time horizon to forecast depends upon where the product currently lies in its life cycle.
2. Opinion and judgemental forecasting methods sometimes incorpotate statistical analysis,
3. In exponential smoothing, low values ofsmoothening constant, alpha result in more smoothing than higher values of alpha.
Which of the statements given above are correct ?
(a) 1,2 and 3 (6) land 2 only
(c) 1 and 3 only (d) 2 and 3 only

IES Previous paper Mechinal Engineering Paper 2 Part 4

IES FREE ONLINE QUESTION BANK PREVIOUS PAPER 2008 Objective Mech Engg. Objective paper 2

This Is 4th Part of 4.To see other parts Click links at bottom of this paper


91. Match List-I with List-II and select the correct answer using the code given below the lists:
List-I List-II
(Principle/Method) (Corresponding Application)
A. Klein's construction ' 1. Instantaneous centers in linkages
B. Kennedy's theorem 2. Relative acceleration of linkages
C. D' Alembert's principle 3. Mobility of linkages
D. Grubler's rule 4. Dynamic forces in linkages


Code:
A B C D
a) 4 1 2 3
b) 2 3 4 1
c) 4 3 2 1
d) 2 1 4 3
92.

The figure above shows the schematic of an automobile having a mass of 900 kg and the
suspension spring constant of 81 x 104 N/m . If it travels at a speed of 72 km/hr on a rough
road with periodic waviness as shown, what is the forcing frequency of the road on the
wheel ?
(a) 10 Hz (b) 4 Hz
(c) 1.5 Hz (d) 20 Hz

93.
At a given instant, a disc is spinning with angular velocity co in a plane at right angles to thepaper, (see the figure) and after a short interval of time δt, it is spinning with angular
velocity w+δw and the axis of spin has changed direction by the amount δθ
In this situation what is the component of acceleration parallel to OA?
(a) dθ/dt (b) w(dθ/dt)
(c) dw/dt (d) dθ/dw

94. A shaft is subjected to combined twisting moment T and bending moment M. What is the
equivalent bending moment ?





95. The ratio of torque carrying capacity of a solid shaft to that of a hollow shaft is given by :
(a) (1-K4) (b) (1-K4)-1
(c) K4 (d) 1/K4
Where K=Di/Do
Di. = Inside diameter of hollow shaft
D0 = Outside diameter of hollow shaft Shaft materials are the same.

96. The principal stresses at a point in two-dimensional stress system are σ1 and σ2 and
corresponding principal strains are e1 and e2 If E and v denote Young's modulus and Poisson's
ratio, respectively, then which one of the following is correct ?
(a) σ1=Ee1
(b) σ1=(E/[1-v2])[e1+ve2]
(c) σ1=(E/[1-v2])[e1-ve2]
(d) σ1=E(e1-ve2)

97. A point in a two dimensional state of strain is subjected to pure shearing strain of magnitude
Yxy radians. Which one of the following is the maximum principal strain ?
a) Yxy
b)Yxy/√2
c) Yxy/2
d) 2Yxy

98.

Consider the Mohr's circle shown above :
What is the state of stress represented by this circle ?

a)σx= σy (not equal to ) 0, σxy=0
b) σx=σy=0, σxy (not equal to ) 0
c) σx= 0 σy= σxy (not equal to ) 0
d)σx (not equal to ) 0 , σxy=σy=0

99. What is the relationship between the linear elastic properties Young's modulus (E), rigidity modulus (G) and bulk modulus (K) ?
a) 1/E= (9/K)+ (3/G)
b) 3/E= (9/K)+ (1/G)
c) 9/E= (3/K)+ (1/G)
d) 9/E= (1/K)+ (3/G)

100.
The shearing force diagram for a beam is shown in the above figure. The bending moment diagram is represented by which one of the following ?
(a) (b)



c) d)

101. Match List-I with List-II and select the correct answer using the code given below the lists :
List - II
(Deals with topic)
1. Defelction of beam
2. Eccentrically loaded column
3. Rivetted joints
4. Continuous beam
List -1
(Formula/theorem/method)
A. Clapeyron's
B. Maculary's
C. Perry's
Code:

A B C
a) 3 2 1
b) 4 1 2
c) 4 1 3
d) 2 4 3


102. Which one of the following statements is correct in the case of screw dislocations ?
(b = Burgers Vector; t = Im aginary Vector)
(a) b is perpendicular to t
(b) b is parallel to t
(c) b is inclined to t
(d) b and t are non-coplanar and non-intersecting

part1

part 2

part3

IES FREE ONLINE QUESTION BANK PREVIOUS PAPER 2008 Objective Mech Engg. Objective paper 2

IES FREE ONLINE QUESTION BANK PREVIOUS PAPER 2008 Objective Mech Engg. Objective paper 2

This Is 3rd Part of 4.To see other parts Click links at bottom of this paper
61 Which of the following in-line engines working on four-stroke cycle is completely balanced inherently ?
(a) 2 cylinder engine (b) 3 cylinder engine
(c) 4 cylinder engine (d) 6 cylinder engine


62. For roller chain drive with sprocket having 10 teeth, the velocity of the driven shaft with
respect to that of drive will be approximately
(a) same (b) 5% above
(c) 5% below (d) 5% above to 5% below


63 Common contact ratio of a pair of spur pinion and gear is
(a) less than 1.0 (b) equal to 1
(c) between 2 and 3 (d) greater than 3


64. If critical path of a project is 20 months with a standard deviation 4 months, what is the
probability that the project will be completed in 24 months ?
(a) 15.85% (b) 68.3%
(c) 84.2% (d) 95.50%



65. Weekly production requirements of a product are 1000 items. The cycle time of producing one product on a machine is 10 minutes. The factory works on two shift basis in which total available time is 16 hours. Out of the available time about 25% is exprected to be wasted on break downs, material unavailability and quality related problems. The factory works for 5 days in a week. How many machines are required to fulfill the production requirements ?
(a) 2 (b) 3
(c) 4 (d) 6


66 Which one of the following is not a technique of Long Range Forecasting ?
(a) Market Research and Market Survey (b) Delphi
(c) Collective Opinion (d) Correlation and Regression



67. Using the exponential smoothing method of forecasting, what will be the forecast for the fourth week if the actual and forecasted demand for the third week is 480 and 500
respectively and a = 0.2 ?
(a) 400 (b) 496
(c) 500 (d) 504


68. Consider the following characteristics of assembly line balancing :
1. apportionment of sequential work activities into work stations
2. high utilization of equipment
3. minimization of idle time
Which of the statements given above are correct ?
(a) 1,2 and 3 (b) land 2 only
(c) 2 and 3 only (d) land 3 only


69. In the production of a product the fixed costs are Rs. 6, 000/-and the variable cost is
Rs. 10/-per product. If the sale price of the product is Rs. 12/-, the break even volume of products to be made will be :
(a) 2000 (b) 3000
(c) 4000 (d) 6000

70 The inter-arrival times at a tool crib are exponential with an average time of 10 minutes and the length of the service time is assumed to be exponential with mean 6 minutes.The probability that a person arriving at the booth will have to wait is equal to :
(a) 0.15 (b) 0.40
(c) 0.42 (d) 0.6


71. If A is greater than B then it is expressed in FORTRAN as :
(a) A>B (b) AGTB
(c) A.GT.B (d) AGT.B


72. Which one of the following is not a command in DBase III ?
(a) Create (b) List
(c) Sort (d) Remove


73. Which one of the following statements regarding computers is not correct ?
(a) Databses contain fields and records
(b) The organized set of instructions given to the computer to solve a problem is called a program
(c) Collection of 8 bits is called a byte
(d) Spreadsheet is a term used in FORTRAN language



74. In three ball bearings identified as
SKF 2015,3115 and 4215
(a) bore is common but width is increasing
(b) outer diameter is common but bore is increasing
(c) width is common but outer diameter is decreasing
(d) bore is common but outer diameter is decreasing



75. Maximum angular velocity of the connecting rod with a crank to connecting rod ratio 1:5
for a crank speed of 3000 rpm is around :
(a) 300rad/s (b) 60rad/s
(c) 30rad/s (d) 3000rad/s


76. Consider the following statements about antifriction bearings :
1. Their location influences the lateral critical speed of a rotor.
2. Roller bearings are antifriction bearings. Which of the statements given above is/are correct ?
(a) lonly (b) 2 only
(c) Both land 2 (d) Neither 1 nor 2


77. Consider the following statements :
1. One way of improving vibration isolation is to decrease the mass of the vibrating object.
2. For effective isolation, the natural frequency of the system should be far less than the exciting frequency.
Which of the statements given above is/are correct ?
(a) lonly (b) 2 only
(c) Both land 2 (d) Neither 1 nor 2


78 Consider the following statements in respect of austentic stainless steels :
1. Austenitic stainless steels are hardened and strengthened by cold working.
2. Austenitic stainless steels cannot be quenched and tempered. ~ Which of the statements given above is/are correct ?
(a) 1 only (b) 2 only
(c) Both land 2 (d) Neither 1 nor 2



Directions : Each of the next Twelve (12) items consists of two statements, one labelled as the 'Assertion (A)' and the other as 'Reason (R)'. You are to examine these two statements carefully and select the answers to these items using the codes given below:
Codes :
(a) Both A and R are individually true and R is the correct explanation of A
{b) Both A and R are individually true but R is not the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
79. Assertion (A) : Value Engineering is concerned with increasing the quality of the product
even at enhanced cost to fulfill the customer requirements.
Reason (R) : Customer requirements are changing very rapidly and survival of a manufacturing industry is linked with fulfilling the customers requirements.


80. Assertion (A) : Lever Rule can be applied to determine relative amounts of phases present
at any temperature.
Reason (R) : Lever Rule is restricted to estimate relative phases, only if they are solid phases.


81. Assertion (A) : In case of Control Chart for fraction rejected (p-chart), binomial
distribution is used.
Reason (R) : In binomial distribution probability of the event varies with each draw.


82. Assertion (A) : In case of Control Charts for variables, the averages of sub-groups of
readings are plotted instead of plotting individual readings.
Reason (R) : It has been proved through experiments that averages will form normal
distribution curve.

83. Assertion (A) : In centralized inspection, material handling is less.
Reason (R) : Less number of gauges and instruments are required as inspection is carried out in one location.


84. Assertion (A) : Submerged arc welding is not recommended for high carbon steels, tool steels, aluminium, magnesium etc.
Reason (R) : This is because of unavailability of suitable fluxes, reactivity at high temeratures and low sublimation temperatures.


85 Assertion (A) ;The Lewis equation for design of gear tooth predicts the static load capacity of a cantilever beam of uniform strength

Reason (R):According to law of gears interchangeabiiity is possible only when gears have same pressure angle and same module

86 . Assertion (A);Elements are classified into metals and nonmetals on the basis of their atomic weights.
Reason (R) The valence electron structures contribute to the primary bonding between the atoms to form aggregates


87 Assertion (A);In design of double fillet welding of unsymmetrical sections with plates subjected to axial loads lengths of parallel welds are made unequal

Reason (R);The lengths of parallel welds in fillet welding of an unsymmetrical section with a plate are so proportioned that the sum of the resisting moments of welds about the centre of gravity axis is zero


88. Assertion (A):A cotter joint is used to rigidly connect two coaxial rods carrying tensile load.

Reason (R) :Taper in the cotter is provided to facilitate its removal when it fails due to shear.


89. Assertion (A) :Two pulleys connected by a crossed belt rotate in opposite directions.
Reason (R) :The length of the crossed belt remains constant.


90. Assertion (A) :In steady rotating condition the journal inside a hydrodynamic journal bearing remains floating on the oil film.

Reason (R):The hydrodynamic pressure developed in steady rotating conditions in journal bearings balances the load on the journal.

link to Part 1
link to part 2
Link to Part 4

Free Download Mech Engineering 2008 IES Papers Objective

Free Download Mech Engineering 2008 IES Papers Objective
This is part 2 of 4 parts
For other parts check links given at bottom of this paper




31. Which one of the following is correct ?
Production, planning and control functions are extremely complex in
(a) job-production shop producing small number of pieces only once
(b) job-production shop producing small number of pieces intermittently
(c) batch production shop producing a batch only once
(d) batch production shop producing a batch at irregular intervals



32. Consider the following steps in production, planning and control:
1. Capacity planning
2. Material requirement planning
3. Purchasing
4. Design decisions
Which one of the following is the correct sequence of the above steps in operations
management ?
(a) 2-3-4-1 (b) 2-4-3-1
(c) 4-1-2-3 (d) 1-2-4-3


33 A PERT activity has an optimistic time estimate of 3 days, a pessimistic time estimate of
8 days, and a most likely time estimate of 10 days. What is the expected time of this activity?
(a) 5.0 days (b) 7.5 days
(c) S.Odyas (d) 8.5 days

34. Which one of the following statments is not correct ?
(a) PERT is activity oriented and CPM is event oriented
(b) In PERT, three time estimates are made, whereas in CPM only one time estimate is made
(c) In PERT slack is calculated whereas in CPM floats are calculated
(d) Both PERT and CPM are used for project situations



35. What is the additional time available for the performance of an activity in PERT and CPM
calculated on the basis that all activities will start at their earliest start time, called ?
(a) Slack (b) Total float
(c) Free float (d) Independent float


36. In the basic EOQ model, if demand is 60 per month, ordering cost is Rs. 12 per order, holding
cost is Rs. 10 per unit month, what is the EOQ ?
(a) 12 (b) 144
(c) 24 (d) 28



37. Which one of the following is correct ?
In the basic EOQ model, if lead time increases from 5 to 10 days, the EOQ will
(a) double (b) decrease by a factor of two
(c) remains the same (d) the data is insufficient to find EOQ
60. Which one of the following statements is not correct ?
(a) Work sampling is a technique of work measurement
(b) Method study is a technique aimed at evolving improved methods
(c) Synthetic data is not a technique covered under pre-determined motion time systems
(d) 'Select' is the first step of method study



38. A time standard for a data entry clerk is to be set. A job is rated at 120 percent, it takes 30
seconds to enter each record and the allowances are 15%. What is the normal time ?
(a) 25 seconds (b) 30 seconds
(c) 36 seconds (d) 40 seconds


39. Which one of the following statements is not correct ?
(a) The operating characteristic curve of an acceptance sampling plan shows the ability of the plan to distinguish between good and bad lots.
(b) No sampling plan can give complete protection against the acceptance of defective products.
(c) C chart has straight line limits and U chart has zig-zag limits.
(d) Double sampling results in more inspection than single sampling if the incoming quality is very bad.


40 Which one of the following statements is not correct ?
(a) A linear programming problem with 2 variables and 3 constraints can be solved by Graphical Method.
(b) In big-M method if the artificial variable can not be driven out it depicts an optimal solution.
(c) Dual of a dual is the primal problem.
(d) For mixed constraints either big-M method or two phase method can be employed.



41. In order for a transportation matrix which has six rows and four columns not to degenerate,what is the number of occupied cells in the matrix ?
(a) 6 (b) 9
(c) 15 (d) 24



42 The Central Processing Unit of a minicomputer uses which of the following blocks
1. Memory Unit
2. Control Unit
3. Arithmetic Unit
4. Output Unit
Select the correct answer using the code given below :
(a) land 2 (b) land 3
(c) 2and 3 (d) land 4

43 Which one of the following statements about FORTRAN is not correct ?
(a) GO TO 999 (b) CONTINUE 999
(c) PRINT 999 (d) DIMENSION A (999)


44. Bottom gating system is sometimes preferred in casting because
(a) it enables rapid filling of mould cavity (b) it is easier to provide in the mould
(c) it profieds cleaner metal (d) it reduces splashing and turbulence


45. The pattern adopted for those castings where there are some portions which are structurally
weak and are likely to break by the force of ramming are called :
(a) Loose piece pattern (b) Follows board pattern
(c) Skelton pattern (rf) Single piece pattern


46. Which of the following casting processes does not/do not require central core for producing
pipe ?
1. Sand casting process
2. Die casting process
3. Centrifugal casting process
Select the correct answer using the code given below :
(a) land2 (b) 2only
(c) 2 and 3 (d) 3 only


47. Small amount of carbonaceous material sprinkled on the inner surface of mould cavity is
called
(a) Backing sand (b) Facing sand
(c) Green sand (d) Dry sand



48. Which one of the following methods is used for the manufacture of collapsible tooth paste
tubes ?
(a) Impact extrusion (b) Direct extrusion
(c) Deep drawing (d) Piercing



49. A cylindrical vessel with fla' bottom can be deep drawn by
(a) shallow drawing (b) single action deep drawing
(c) double action deep drawing (d) triple action deep drawing






50.Consider the following statements :
1. Metal forming decreases harmful effects of impurities and improves mechanical strength.
2. Metal working process is a plastic deformation process.
3. Very intricate shapes can be produced by forging process as compared to casting process. Which of the statements given above are correct ?
(a) 1,2and3 {b) land2only
(c) 2 and 3 only (d) 1 and 3 only

51. Structure of a polymer is :
(a) Long chain (b) Rhombic
(c) Cubic (d) Closed pack hexagonal



52. A structural member subjected to an axial compressive force is called
(a) beam (b) column
(c) frame (d) strut



53. In case of a beam of circular cross-section subjected to transverse loading, the maximum
shear stress developed in the beam is greater than the average shear stress by
(a) 50% $) 33%
(c) 25% (d) 10%


54. In I-section of a beam subjected to transverse shear force, the maximum shear stress is
developed
(a) at the centre of the web (b) at the top edge of the top flange
(c) at the bottom edge of the top flange (d) none of the above


55. Maximum shear stress in a Mohr's Circle
(a) is equal to radius of Mohr's circle (b) is greater than radius of Mohr's circle
(c) is less than radius of Mohr's circle (d) could be any of the above


56 Consider the following statements :
Maximum shear stress induced in a power transmitting shaft is
1. directly proportional to torque being transmitted.
2. inversely proportional to the cube of its diameter.
3. directly proportional to its polar moment of inertia. Which of the statements given above are correct ?
(a) 1,2and3 (b) land3only
(c) 2 and 3 only (d) J and 2 only

57. Consider the following :-belts are specified by their
1. nominal inside length in mm
2. nominal pitch length
3. belt cross section symbol
4. weight/unit length of the belt Which of the above are correct ?
(a) 1,2,3 and 4 (b) land 2 only
(c) 1 and 3 only (d) 3 and 4 only


58. Consider the following statements :
A nomenclature 50 H8/p8 denotes that
1. hole diameter is 50 mm.
2. it is a shaft base system.
3. 8 indicates fundamental deviation
Which of the statement given above is/are correct ?
(a) 1,2and3 (b) land2only
(c) 2 and 3 only (d) 3 only


59 Consider the following statements:
1. The amount of interference needed to create a tight joint varies with diameter of the shaft.
2. An interference fit creates no stress state in the shaft.
3. The stress state in the hub is similar to a thick-walled cylinder with internal pressure. Which of the statements given above are correct ?
(a) 1,2and3 (b) land2only
(c) 2 and 3 only (d) land 3 only

60. Eight bolts are to be selected for fixing the cover plate of a cylinder subjected to a maximum load of 980. 175 kN. If the design stress for the bolt material is 315 N/mm2, what is the diameter of each bolt ?
(a) 10 mm {b) 22 mm
(c) 30 mm (d) 36 mm


Note This one is Part 2 of 4
Link to part 1
Link to part 3
Link to part 4

IES 2008 Mechanical Engineering Paper II Previous Question Paper

Indian Engineering Services IES Conducted By UPSC Year 2008 Paper II Objective Mech Engineering .This is part 1 of 4 For Other parts Check Links given at Bottom of This paper

1 Which mechanism produces intermittent rotary motion from continuous rotary motion ?
(a) Whitworth mechanism (b) Scotch Yoke mechanism
(c) Geneva mechanism (d) Elliptical trammel



2 A journal bearing with hydrodynamic lubrication is running steadily with a certain amount of minimum film thickness. When the load speed are doubled, how does the minimum film thickness vary ?
(a) Remains unchanged
(b) Gets doubled
(c) Gets reduced to one-fourth of original value
(d) Gets reduced to half of original value


3 Interference between an involute gear and a pinion can be reduced by which of the following ?
1. Increasing the pressure angle of the teeth in the pair, the number of teeth remaining the same.
2. Decreasing the addendum of the gear teeth and increasing the same for the pinion teeth by the corresponding amount.
Select the correct answer using the code given below :
(a) l only (b) 2 only
(c) Both l and 2 (d) Neither 1 nor 2


4 Which one of the following is correct ?
When two teeth profiles of gears are conjugate, the sliding velocity between them
(a) is always zero all through the path of contact
(b) is zero, at certain points along the path of contact
(c) is never zero anywhere on the path of contact
(d) can be made zero by proper selection of profiles


5. For a speed ratio of 100 smallest gear box is obtained by using which of the following ?
(a) A pair of spur gears
(b) A pair of bevel and a pair of spur gears in compound gear train
(c) A pair of helical and a pair of spur gears in compound gear train
(d) A pair of helical and a pair of worm gears in compound gear train



6. Among the following four designs of a flywheel with given mass M(kg) and external
diameter D(m), which is the one with the highest energy storage capacity ?
(a) Plain circular disc of uniform thickness
(b) Double conical disc thicker at the centre and thinner at the periphery
(c) Double conical disc thinner at the centre and thicker at the periphery
(d) Circular ring with spokes

7 Which one of the following mechanisms represents an inversion of the single slider-crank chain ?
(a) Elliptical trammel {b) Oldham's coupling
(c) Whitworth quick return mechanism (d) Pantograph mechanism


8 Which one of the following is correct ?
A hydrodynamic slider bearing develops load-bearing capacity mainly because of
(a) slider velocity (b) wedge shaped oil film
(c) oil compressibility (d) oil viscosity



9 Which one of the following is correct ?
When a nut is tightened by placing a washer below it, the bolt will be subjected to
(a) compression only (b) tension
(c) shear only (d) compression and shear



10. Which material is used for bushes in the bushed-pin type of flexible coupling ?
(a) Gun metal {b) Plastic
(c) Rubber (d) Aluminium


11. The balls of the ball bearings are manufactured from steel rods. The operations involved are:
1. Ground
2. Hot forged on hammers
3. Heat treated
4. Polished
What is the correct sequence of the above operations from start ?
(a) 3-2-4-1 (b) 3-2-1-4
(c) 2-3-1-4 (d) 2-3-4-1


12. In automobiles, Hook's joint is used between which of the following ?
(a) Clutch and gear box (b) Gear box and differential
(c) Differential and wheels (d) Flywheel and clutch



13. In a flat belt drive the belt can be subjected to a maximum tension T and centrifugal
tension T . What is the condition for transmission of maximum power ?
(a) T = Tc (b) T = V3Tc
(c) T = 2T (d) T = 3T



14 A100 mm x 5 mm x 5 mm steel bar free toexpand is heated from 15 °C to 40°C. What shall be developed ?
(a) Tensile stress (b) Compressive stress
(c) Shear stress (d) No stress


15 What is the shape of the shearing stress distribution across a rectangular cross-section beam?
(a) Triangular
(b) Parabolic only
(c) Rectangular only
(d) A combination of rectangular and parabolic shape


16 Where does the maximum hoop stress in a thick cylinder under external pressure occur ?
(a) At the outer surf ace (b) At the inner surf ace
(c) At the mid-thickness (d) At the 2/3cd outer radius


17 Who postulated the maximum distortion energy theory ?
(a) Tresca {b) Rankine
(c) St. Venant(d) Mises-Henky


18 Which one of the following is correct ?
When "devitrification" of inorganic glasses is done,
(a) glass transforms from crystalline to non-crystalline state
(b) glass transforms into a fully transparent material
(e) glass, transforms from non-crystalline state to poly-crystalline state ; (d) glass is relieved of internal stresses


19 What is a surface imperfection, which separates crystals of different orientations in a
poly-crystalline aggregate, called ?
(a) Edge dislocation (b) Stacking fault
(c) Grain boundary (d) Screw dislocation


20 Which one of the following is correct ?
Malleability is the property by which a metal or alloy can be plastically deformed by applying
(a) tensile stress (b) bending stress
(c) shear stress (d) compressive stress


21. Which of the following elements given below determine (s) the maimum attainable hard
ness in steel?
1. Chromium
2. Manganese
3. Carbon
4. Molybdenum
Select the correct answer using the code given below :
(a) l only (b) 1 and 2
(c) 3 only (d) 2 and 4



22. Coefficient of Expansion is practically nil in a particular alloy. What is this alloy ?
(a) Hadfield Manganese Steel {b) Invar
(c) Vitallium (d) Stellite




23. Consider the following statements relating to mechanical properties of ceramics :
1. Tensile strength is theoretically high but in practice quite low.
2. Compressive strength is many times lower than tensile strength.
3. Shear strength is high.
4. Transverse strength is easy to ascertain. Which of the statements given above are correct ?
(a) land 3 (b) land 4
(c) 2 and 3 (d) 2 and 4



24. What is the process by which two or more chemically different monomers are polymerised to
form a cross link polymer together with a by-product such as water or ammonia, known as ?
(a) Addition polymerisation (b) Co-polymerisation
(c) Linear polymerisation (d) Condensation polymerisation



25. Which one of the following is correct ?
Babbitts are used for
(a) gears (b) bearings
(c) bolts (d) clutch liners


26 Cold forging results in improved quality due to which of the following ?
1. Better mechanical properties of the process.
2. Unbroken grain flow.
3. Smoother finishes.
4. High pressure.
Select the correct answer using the code given below :
(a) 1,2 and 3 (b) 1,2 and 4
(c) 2, 3 and 4 (rf) 1,3 and 4




27 . Consider the following statements :
In an orthogonal cutting the cutting ratio is found to be 0.75. The cutting speed is 60 m/min
and depth of cut 2.4 mm.
Which of the following are correct ?
1. Chip velocity will be 45 m/min.
2. Chip velocity will be 80 m/min.
3. Chip thickness will be 1.8 mm.
4. Chip thickness will be 3.2 mm.
Select the correct answer using the code given below :
(a) land3 (b) land4
(c) 2 and 3 (d) 2 and 4



28 What are the reasons for reduction of tool life in a machining operation ?
1. Temperature rise of cutting edge
2. Chipping of tool edge due to mechanical impact
3. Gradual wear at tool point
4. Increase in feed of cut at constant cutting force Select the correct answer using the code given below :
(a) 1,2 and 3 (b) 2,3 and 4
(c) 1,3 and 4 (d) 1,2 and 4



29 What term is used to designate the direction of the predominant surface pattern produced
by machining operation ?
(a) Roughness (b) Lay
(c) Waviness (d) Cutoff


30. Which one of the following statements is not correct ?
(a) Schedule chart shows the processing of a job on various work centres against time
(b) Load chart shows the processing of various jobs on a work centre against time
(c) Dispatching is the activity related with dispatching of goods to the customers
(d) Routing is the activity related with the operations and their sequence to be performed on the job



This is part 1 of 4 parts of Question Paper

Link to part 2
Link to Part 3
Link to Part 4