Governor MCQ

61. Function of governor is to

  1. regulate the speed during one cycle
  2. minimise the vibration of a cycle
  3. reduced fluctuations of speed
  4. maintain the speed of engine within specified limits
Answer
Answer. d

62. Which one of the following is a gravity controlled type governor?

  1. Hartnell governor
  2. Hartung governor
  3. Watt governor
  4. Pickering governor
Answer
Answer. c

63. In a Hartnell governor, the mass of each bell is 4 kg. The maximum and minimum centrifugal forces on the balls are 1800 N and 100 N at radii 25 cm and 20 cm, respectively. The lengths of vertical and horizontal arms of the bell crank levers are the same. What is the spring stiffness?

  1. 740 N/cm
  2. 780 N/cm
  3. 680 N/cm
  4. 720 N/cm
Answer
Answer. c

64. A spring controlled governor is found unstable. It may be made stable by

  1. increasing spring stiffness
  2. decreasing spring stiffness
  3. increasing ball weight
  4. decreasing ball weight
Answer
Answer. b

65. The change in governor height for a Watt governor when speed varies from 100 r.p.m. to 101 r.p.m. will be nearly

  1. 2.6 mm
  2. 1.8 mm
  3. 4.2 mm
  4. 3.4 mm
Answer
Answer. b

66. Centrifugal governors are preferred to the inertia type governors because an inertia governor

  1. has less controlling force
  2. is highly sensitive and more prone to hunting
  3. posses problems in the balancing of inertia forces
  4. has high initial and maintenance cost
Answer
Answer. c

67. In watt governor, the weight of the ball is 50 N and the friction at the sleeve is 10 N. The coefficient of detention would be

  1. 5.0
  2. 0.5
  3. 0.2
  4. 0.1
Answer
Answer. c

68. Governor is stable, when the

  1. radius of rotation of balls decreases as the equilibrium speed decreases
  2. radius of rotation of balls increases as the equilibrium speed decreases
  3. radius of rotation of balls increases as the equilibrium speed increases
  4. radius of rotation of balls decreases as the equilibrium speed increases
Answer
Answer. c

69. When the speed of the engine fluctuates continuously above and below the mean speed then the governor is said to be

  1. Stable
  2. Unstable
  3. Hunt
  4. Isochronous
Answer
Answer. c

70. Example of spring controlled governor is

  1. Porter’s governor
  2. Watt governor
  3. Proell governor
  4. Hartnell governor
Answer
Answer. d
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