76) A body is said to be under forced vibrations, when

there is a reduction in amplitude after every cycle of vibration

no external force acts on a body, after giving it an initial displacement

a body vibrates under the influence of external force

none of the above

Answer is:

a body vibrates under the influence of external force

Theory of Machines MCQ with Answers

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77) In a turning moment diagram, the variations of energy above and below the mean resisting torque line is called

fluctuation of energy

maximum fluctuation of energy

coefficient of fluctuation of energy

none of these

Answer is:

fluctuation of energy

78) In a spring controlled governor, when the controlling force __________ as the radius of rotation increases, it is said to be a stable governor.

remains constant

decreases

increases

none of these

Answer is:

increases

79) The distance between the centre of suspension and centre of percussion is equal to the equivalent length of a simple pendulum.

Agree

Disagree

Answer is:

Agree

80) When the body is suspended at the point of suspension, its periodic time and frequency will be __________ as compared to the body suspended at the point of percussion.

same

two times

four times

none of these

Answer is:

same

Theory of Machines MCQ with Answers

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76) A body is said to be under forced vibrations, when

a body vibrates under the influence of external force

Theory of Machines MCQ with Answers

Related Theory of Machines MCQ with Answers

77) In a turning moment diagram, the variations of energy above and below the mean resisting torque line is called

fluctuation of energy

78) In a spring controlled governor, when the controlling force __________ as the radius of rotation increases, it is said to be a stable governor.

increases

79) The distance between the centre of suspension and centre of percussion is equal to the equivalent length of a simple pendulum.

Agree

80) When the body is suspended at the point of suspension, its periodic time and frequency will be __________ as compared to the body suspended at the point of percussion.

same

Theory of Machines MCQ with Answers