Engineering Questions with Answers - Multiple Choice Questions

# Machine Dynamics MCQ – Types of Governors

1 - Question

The height of a Watt’s governor is equal to
a) 8.95/N2
b) 89.5/N2
c) 895/N2
d) 8950/N2

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 - Question

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)

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 - Question

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

Explanation: A watt’s governor may only work satisfactorily at low speeds i.e. from 60 to 80 r.p.m.

4 - Question

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

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 - Question

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

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 - Question

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

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 - Question

In a Porter governor, the balls are attached to the extension of lower links.
a) True
b) False

Explanation: Porter governor is a modification of Watt’s governor, with a central load attached to the sleeve.

8 - Question

A Hartnell governor is a
b) pendulum type governor
d) inertia governor

9 - Question

A Watt’s governor is a spring loaded governor.
a) True
b) False

Explanation: A Hartnell governor is a spring loaded governor.
Watt’s governor is a pendulum type governor.

10 - Question

Which of the following is a pendulum type governor?
a) Watt’s governor
b) Porter governor
c) Hartnell governor
d) None of the mentioned