# Mechanical Engineering - Theory of machines

### Exercise :: Theory of machines - Section 1

31.

The gears are termed as medium velocity gears, if their peripheral velocity is

 A. 1 - 3 m/s B. 3 - 15 m/s C. 15 - 30 m/s D. 30 - 50 m/s

Explanation:

No answer description available for this question. Let us discuss.

32.

For a twin cylinder V-engine, the crank positions for primary reverse cranks and secondary direct cranks are shown in the below figure. The engine is a

 A. 30° V-engine B. 60° V-engine C. 120° V-engine D. 150° V-engine

Explanation:

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33.

The frequency of damped vibrations with viscous damping is __________ the frequency of undamped vibrations.

 A. more than B. less than C. same as

Explanation:

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34.

Whitworth quick return motion mechanism consists of three turning pairs and one sliding pair.

 A. Right B. Wrong

Explanation:

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35.

The rotor of a ship rotates in clockwise direction when viewed from stern and the ship takes a right turn. The effect of gyroscopic couple acting on it will be to raise the stern and lower the bow.

 A. Agree B. Disagree