58) A body will begin to move down an inclined plane, if the angle of inclination of the plane is __________ the angle of friction.

equal to

less than

greater than

none of these

Answer is:

greater than

Theory of Machines MCQ with Answers

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59) The height of a Watt's governor is

directly proportional to speed

directly proportional to (speed)²

inversely proportional to speed

inversely proportional to (speed)²

Answer is:

inversely proportional to (speed)²

60) Which of the following is a higher pair?

Belt and pulley

Turning pair

Screw pair

Sliding pair

Answer is:

Belt and pulley

61) When the belt is stationary, it is subjected to some tension known as initial tension. The value of this tension is equal to the

tension in the tight side of the belt

tension in the slack side of the belt

sum of the tensions on the tight side and slack side of the belt

average tension of the tight side and slack side of the belt

Answer is:

average tension of the tight side and slack side of the belt

62) In a force-closed pair, the two elements of a pair are not held together mechanically.

Agree

Disagree

Answer is:

Disagree

Explanation:

When the two elements of a pair are not connected mechanically but are kept in contact by the action of external forces, the pair is said to be a force-closed pair. The cam and follower is an example of force closed pair, as it is kept in contact by the forces exerted by spring and gravity.