Theory of Machines

61. In elliptical trammels

  1. all four pairs are turning
  2. three pairs turning and one pair sliding
  3. two pairs turning and two pairs sliding
  4. one pair turning and three pairs sliding
  5. all four pairs sliding.

Correct answer: (C)
two pairs turning and two pairs sliding

62. In gramophones for adjusting the speed of the turntable, the following type of governor is commonly employed

  1. Hartung governor
  2. Wilson Hartnell governor
  3. Pickering governor
  4. Inertia governor
  5. none of the above.

Correct answer: (C)
Pickering governor

63. In higher pair, the relative motion is

  1. purely turning
  2. purely sliding
  3. purely rotary
  4. purely surface contact
  5. combination of sliding and turning.

Correct answer: (E)
combination of sliding and turning.

64. In its simplest form, a cam mechanism consists of following number of links

  1. 1
  2. 2
  3. 3
  4. 4
  5. none.

Correct answer: (C)
3

65. In multi-V-belt transmission, if one of the belt is broken, we have to change the

  1. broken belt
  2. broken belt and its adjacent belts
  3. all the belts
  4. there is no need of changing any one as remaining belts can take care of transmission of load
  5. all the weak belts.

Correct answer: (C)
all the belts

66. In problem 47, the chain is constrained when

  1. L.H.S. = R.H.S.
  2. L.H.S. < R.H.S.
  3. L.H.S. > R.H.S.
  4. there is no such criterion for checking above requirement
  5. none of the above.

Correct answer: (A)
L.H.S. = R.H.S.

67. In problem 47, the chain is unconstrained when

  1. L.H.S. = R.H.S.
  2. L.H.S. > R.H.S.
  3. L.H.S. < R.H.S.
  4. there is no such criterion for checking above requirement
  5. none of the above.

Correct answer: (C)
L.H.S. < R.H.S.

68. In S.H.M., acceleration is proportional to

  1. velocity
  2. displacement
  3. rate of change of velocity
  4. all of the above
  5. none of the above.

Correct answer: (B)
displacement

69. In S.H.M., the velocity vector w.r.t. displacement vector

  1. leads by 90°
  2. lags by 90°
  3. leads by 180°
  4. are in phase
  5. could be anywhere.

Correct answer: (A)
leads by 90°

70. Inertia force acts

  1. perpendicular to the accel< force
  2. along the direction of accel* force
  3. opposite to the direction of ace ing force
  4. in any direction w.r.t. accel* force depending on the magnit two
  5. none of the above.

Correct answer: (C)
opposite to the direction of ace ing force

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