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.

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