theory of machines MCQs – Page 2

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

theory of machines Mcqs
21. The magnitude of tangential acceleration is equal to____________________?
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A. velocity x crank radius2

B. velocity2 x crank radius

C. velocityvcrankradius

D. none of the above

E. (velocity/crankradius)

22. Angular acceleration of a link can be determined by dividing the___________________?
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A. centripetal component of acceleration with length of link

B. all of the above

C. tangential component of acceleration with length of link

D. resultant acceleration with length of link

E. none of the above

23. A completely constrained motion can be transmitted with __________________?
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A. 1 link with pin joints

B. all of the above

C. 2 links with pin joints

D. 4 links with pin joints

E. 3 links with pin joints

24. The Hookes joint consists of ____________________?
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A. five forks

B. one fork

C. four forks

D. three forks

E. two forks
25. Relationship between the number of links (L) and number of pairs (P) is___________________?
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A. P = L-4

B. P = 2L-4

C. P = 2L+2

D. P = 2L-2

E. P = 2L + 4

26. A panto graph is a mechanism with___________________?
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A. rolling pairs

B. turning pairs

C. spherical pairs

D. higher pairs

E. lower pairs
27. The values of velocity and acceleration of piston at near dead center for a slider-crank mechanism will be________________?
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A. 0, and more than co2r

B. cor, 0

C. none of the above

D. 0, 0

E. 0, and less than coV

28. Pulley in a belt drive acts as_______________?
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A. rolling pair

B. sliding pair

C. surface pair

D. cylindrical pair

E. turning pair

29. The Ackermann steering mechanism is preferred to the Davis type in automobiles because____________________?
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A. the former is most rigid

B. the former is most economical

C. the former is having turning pair

D. the former is mathematically accurate

E. none of thfr above

30. Which of the following is a lower pair_______________?
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A. cam and follower

B. A. and B. above

C. ball and socket i

D. belt drive

E. piston and cylinder

31. A universal joint is an example of_____________________?
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A. higher pair

B. sliding pair

C. lower pair

D. rolling pair

E. turning pair

32. The locus of a point on a thread unwound from a cylinder will be___________________?
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A. involute

B. cycloidal

C. helix

D. a straight line

E. a circle

33. Which of the following disciplines provides study of the relative motion between the parts of a machine and the forces acting on the parts___________________?
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A. kinematics

B. applied mechanics

C. theory of machines

D. kinetics

E. mechanisms

34. In an ideal machine, the output as compared to input is_______________?
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A. more

B. less

C. always less

D. equal

E. may be less or more depending on efficiency

35. Coriolis component acts________________?
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A. perpendicular to sliding surfaces

B. along sliding surfaces

C. unpredictable

D. none of the above

E. somewhere in between above two

36. Any point on a link connecting double slider crank chain will trace a ________________?
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A. ellipse

B. parabola

C. hyperbola

D. straight line

E. circle

37. In multi-V-belt transmission, if one of the belt is broken, we have to change the_________________?
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A. broken belt

B. all the weak belts

C. there is no need of changing any one as remaining belts can take care of transmission of load

D. broken belt and its adjacent belts

E. all the belts
38. If two moving elements have surface contact in motion, such pair is known as_________________?
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A. higher pair

B. lower pair

C. rolling pair

D. surface pair

E. sliding pair

39. A circular bar moving in a round hole is an example of_______________?
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A. partially constrained motion

B. incompletely constrained motion

C. completely constrained motion

D. none of the above

E. successfully constrained motion

40. With single Hookes joint it is possible to connect two shafts, the axes of which have an angular misalignment up to ________________?
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A. 40

B. 60.

C. 30

D. 10

E. 20