MECHANISM AND MACHINE MCQ -07 ON VIBRATION

Q.1 The motion completed in the time interval of a period is called ____.

A. Period

B. Frequency

C. Cycle

D. Time

Ans-: C

Q.2 In vibration after initial displacement, no external force act and the motion is maintained by the internal elastic forces is called ____________ vibration.

A. Free 

B. Damped

C. Natural

D. Forced 

E. A+ C

Ans-: E

Q.3 The number of complete cycles of motion in a unit interval of time is known as ____.

A. Frequency

B. Time

C. Period

D. Vibration period

Ans-: A

Q.4 The interval of time taken by the motion to repeat itself is known as the _____.

A. Cycle

B. Period

C. Frequency

D. None of the above

Ans-: B

Q.5 Due to the internal and external resistances, the energy processed by the system is gradually dissipated ,such type of vibration is known as the

_____.

A. Free vibration

B. Damped vibration

C. Torsional vibration

D. Forced vibration

Ans-: B

Q.6 When the periodic disturbing force is applied to the body, then vibrations have same frequency as the applied force is called ?

A. Natural vibration

B. Damped vibration

C. Torsional vibration

D. Forced vibration

Ans-: D

Q.7 Resonance is caused when the frequency of the external force coincides with the _____ of the system.

A. Natural vibration 

B. Force

C. Natural frequency

D. Vibration

Ans-: C

Q.8 Which of the following is not a type of vibration?

A. Free

B. Forced

C. Damped

D. Periodic 

Ans-: D

Q.9 If the damping factor for a vibrating system is unity, then the system is called ____ system.

A. Over damped

B. Under damped

C. Critically damped

D. Not damped

Ans-: C

Q.10 In forced vibrations the magnitude of damping force at resonance equals to _____.

A. Zero

B. Impressed force

C. Inertia force

D. Spring force

Ans-: B