250+ TOP MCQs on Types of Governors and Answers

Machine Dynamics Multiple Choice Questions on “Types of Governors”.

1. The of a Watt’s governor is equal to
a) 8.95/N²
b) 89.5/N²
c) 895/N²
d) 8950/N²
Answer: c
Clarification: If N is the speed of the arm and ball about the spindle axis, then the of the governor (h) is given by
h = 895/N² metres

2. The 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)
Answer: d
Clarification: If N is the speed of the arm and ball about the spindle axis, then the of the governor (h) is given by
h = 895/N² metres
From this expression, we see that the 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
Answer: a
Clarification: A watt’s governor may only work satisfactorily at low speeds i.e. from 60 to 80 r.p.m.

4. The ratio of of Porter governor to the of Watt’s governor is
a) m/m + M
b) M/ m + M
c) m + M/m
d) m + M/M
Answer: c
Clarification: The ratio of of a Porter governor (when length of arms and links are equal) to the 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