This set of Machine Dynamics Multiple Choice Questions & Answers (MCQs) focuses on “Types of Governors”.
1. The height of a Watt’s governor is equal to
a) 8.95/N2
b) 89.5/N2
c) 895/N2
d) 8950/N2
View Answer
Explanation: If N is the speed of the arm and ball about the spindle axis, then the height of the governor (h) is given by
h = 895/N2 metres
2. The height of a Watt’s governor is
a) directly proportional to speed
b) directly proportional to (speed)
c) inversely proportional to speed
d) inversely proportional to (speed)
View Answer
Explanation: If N is the speed of the arm and ball about the spindle axis, then the height of the governor (h) is given by
h = 895/N2 metres
From this expression, we see that the height height of a Watt’s governor is inversely proportional to N2
3. A Watt’s governor can work satisfactorily at speeds from
a) 60 to 80 r.p.m
b) 80 to 100 r.p.m
c) 100 to 200 r.p.m
d) 200 to 300 r.p.m
View Answer
Explanation: A watt’s governor may only work satisfactorily at low speeds i.e. from 60 to 80 r.p.m.
4. The ratio of height of Porter governor to the height of Watt’s governor is
a) m/m + M
b) M/ m + M
c) m + M/m
d) m + M/M
View Answer
Explanation: The ratio of height of a Porter governor (when length of arms and links are equal) to the height of Watt’s governor is m + M/n, where m and M re the masses of the ball and sleeve respectively.
5. When the sleeve of a porter governor moves upwards, the governor speed
a) increases
b) decreases
c) remains unaffected
d) first increases and then decreases
View Answer
Explanation: When the sleeve of a porter governor moves upwards, the governor speed increases and when the sleeve moves downwards, the governor speed decreases.
6. When the sleeve of a Porter governor moves downwards, the governor speed
a) increases
b) decreases
c) remains unaffected
d) first increases and then decreases
View Answer
Explanation: When the sleeve of a porter governor moves upwards, the governor speed increases and when the sleeve moves downwards, the governor speed decreases.
7. In a Porter governor, the balls are attached to the extension of lower links.
a) True
b) False
View Answer
Explanation: Porter governor is a modification of Watt’s governor, with a central load attached to the sleeve.
8. A Hartnell governor is a
a) dead weight governor
b) pendulum type governor
c) spring loaded governor
d) inertia governor
View Answer
Explanation: A Hartnell governor is a spring loaded governor.
Watt’s governor is a pendulum type governor.
9. A Watt’s governor is a spring loaded governor.
a) True
b) False
View Answer
Explanation: A Hartnell governor is a spring loaded governor.
Watt’s governor is a pendulum type governor.
10. Which of the following is a pendulum type governor?
a) Watt’s governor
b) Porter governor
c) Hartnell governor
d) None of the mentioned
View Answer
Explanation: Watt’s governor is a pendulum type governor.
Sanfoundry Global Education & Learning Series – Machine Dynamics.
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