Governor MCQ

21. Which of the statement is CORRECT about the height of simple watt governor?

1. Directly proportional to speed N.
2. Inversely proportional to speed N.
3. Directly proportional to square of speed N.
4. Inversely proportional to the square of speed.

22. For the same lift of sleeve, range of speed of proell governor as compared to porter governor is

1. Less
2. More
3. Equal
4. Half

23. Which of the following equation holds TRUE for height (in decameter) of the watt governor?

1. 8.95/N²
2. 89.5/N²
3. 895/N²
4. 8950/N²

24. In a governor, if the equilibrium speed is constant for all radii of rotation of balls, the governor is said to be

1. stable governor
2. unstable governor
3. inertia governor
4. isochronous governor

25. A spring controlled governor is said to be unstable when the controlling force

1. increases as the radius of rotation decreases
2. increases as the radius of rotation increases
3. decreases as the radius of rotation increases
4. remains constant for all radii

26. When the sleeve of a Porter governor moves upwards, the governor speed

1. increases
2. first increases and then decreases
3. remains unaffected
4. decreases

27. When the relation F_c = a.r + b is satisfied for a spring controlled governor as the relation between controlling force (F_c) and radius of rotation (r). This type of governor is known as

1. stable
2. unstable
3. isochronous
4. hunt

28. If Hartnell governor uses a spring of greater stiffness, it will become

1. more sensitive
2. less sensitive
3. remain unaffected
4. isochronous

29. Which of the following governors does not have central load attached to their sleeves?

1. Porter governor
2. Watt governor
3. Proell governor
4. None of these

30. In a Hartnell governor, 800 N force is exerted on the sleeve at minimum radius and 1200 N force is exerted at maximum radius, If sleeve lift is 20 mm, the value on spring stiffness (S) is

1. 20 N/mm
2. 10 N/mm
3. 18 N/mm
4. 15 N/mm