theory of machines MCQs – Page 5

Practise focused theory of machines questions with marked answers for exam preparation and subject revision.

theory of machines Mcqs
81. Which of the following disciplines provides study of relative motion between the parts of a machine______________?
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A. theory of machines

B. kinematics

C. mechanisms

D. applied mechanics

E. kinetics

82. The example of rolling pair is________________?
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A. bolt and nut

B. ball and socket joint

C. all of the above

D. lead screw of a lathe

E. ball bearing and roller bearing
83. Oldhams coupling is the ____________________?
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A. second inversion of single slider crank chain

B. fourth inversion of double slider crank chain

C. third inversion of slider crank chain

D. second inversion of double slider crank chain

E. third inversion of double slider crank chain
84. If the opposite links of a four bar linkage are equal, the links will always form a_________________?
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A. triangle

B. parallelogram

C. rectangle

D. pentagon

E. trapezoid

85. For a kinematic chain to be considered as mechanism___________________?
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A. none of the above

B. none of the links should be fixed

C. two links should be fixed

D. there is no such criterion

E. one link should be fixed
86. Creep in belt drive is due to____________________?
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A. uneven extensions and contractions due to varying tension

B. larger size of the driver pulley

C. material of the pulley

D. material of the belt

E. expansion of belt

87. Davis steering gear consists of__________________?
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A. higher pairs

B. lower pairs

C. rolling pairs

D. sliding pairs

E. turning pairs

88. When a ship travels in a sea, which of the effect is more dangerous___________________?
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A. none of the above

B. pitching

C. rolling

D. steering

E. all of the above

89. Kinematic pairs are those which have two elements that ______________?
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A. have surface contact

B. are held together

C. have line contact

D. have dynamic forces

E. permit relative motion
90. Idler pulley is used___________________?
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A. for applying tension

B. all of the above

C. none of the above

D. for increasing -velocity ratio

E. for changing the direction of motion of the belt

91. Whitworth quick return mechanism is obtained by inversion of___________________?
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A. five link mechanism

B. slider crank mechanism

C. none of the above

D. roller cam mechanism

E. kinematic chain

92. If there are L number of links in a mechanism then number of possible inversions is equal to_______________?
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A. L 2

B. L + 1

C. L 1

D. L

E. L + 2

93. The pressure angle of a cam depends upon___________________?
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A. lift of follower

B. angle of ascent

C. all of the above

D. sum of radii of base circle and roller follower

E. offset between centre lines of cam and follower

94. For fluctuating loads, welsuited bearing is_________________?
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A. thrust bearing

B. roller bearing

C. needle roller bearing

D. sleeve bearing

E. ball bearing

95. In gramophones for adjusting the speed of the turntable, the following type of governor is commonly employed_______________?
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A. none of the above

B. Wilson Hartnell governor

C. Hartung governor

D. Pickering governor

E. Inertia governor

96. The example of spherical pair is_____________________?
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A. ball and socket joint

B. ball bearing and roller bearing

C. none of the above

D. bolt and nut

E. lead screw of a lathe

97. A mechanism is an assemblage of ____________________?
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A. two links

B. four links or more than four links

C. all of the above

D. none of the above

E. three links

98. The moment on the pulley which produces rotation is called ___________________?
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A. moment of momentum

B. momentum

C. inertia

D. work

E. torque
99. Kleins construction can be used to determine acceleration of various parts when the crank is at_________________?
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A. inner dead centre

B. outer dead centre

C. all of the above

D. right angles to the link of the stroke

E. at 45 to the line of the stroke

100. If the radius of gyration of a compound pendulum about an axis through e.g. is more, then its frequency of oscillation will be_______________?
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A. same

B. none of the above

C. less

D. data are insufficient to determine same

E. more