MCQ Questions and Answers on Dynamics of Machinery

Q.

Longitudinal vibrations are said to occur when the particles of a body moves

A. perpendicular to its axis

B. parallel to its axis

C. in a circle about its axis

D. none of the mentioned

Discuss

Answer : Option:- B

Explanation :

Discuss here! No Explaination Available for These Question.

Q.

If the unbalanced system is not set right then.

A. Static forces develop

B. Dynamic forces develop

C. Tangential forces develop

D. Radial forces develop

Discuss

Answer : Option:- A

Explanation :

Discuss here! No Explaination Available for These Question.

Q.

The secondary unbalanced force produced by the reciprocating parts of a certain cylinder of a given engine with crank radius r and connecting rod length l can be considered as equal to primary unbalanced force produced by the same weight having

A. an equivalent crank radius r2 /4l and rotating at twice the speed of the engine

B. r2 /4l as equivalent crank radius and rotating at engine speed

C. equivalent crank length of r2 /4l and rotating at engine speed

D. none of the mentioned

Discuss

Answer : Option:- A

Explanation :

Discuss here! No Explaination Available for These Question.

Q.

The receiver in the noise control system is usually

A. source machine

B. computer

C. wall

D. human

Discuss

Answer : Option:- D

Explanation :

Discuss here! No Explaination Available for These Question.

Q.

An undamped vibration absorber removes the original resonance peak but introduces

A. several new peaks

B. two new peaks

C. one new peak

D. None of the above

Discuss

Answer : Option:- B

Explanation :

Discuss here! No Explaination Available for These Question.

Q.

Which type of monitoring system uses stroboscope to measure speed of the machine?

A. Portable condition monitoring system

B. Basic condition monitoring system

C. Computer based condition monitoring system

D. None of the above

Discuss

Answer : Option:- B

Explanation :

Discuss here! No Explaination Available for These Question.

Q.

To have natural frequency of instrument very high, spring stiffness should be

A. low

B. high

C. medium

D. very low

Discuss

Answer : Option:- B

Explanation :

Discuss here! No Explaination Available for These Question.

Q.

Find the critical speed when trailer is travelling over a raod with profile approximated by a sine wave of amplitude 0.08 m and wavelength 14 m. Take natural frequency is 9.9 rad/sec

A. 0.794 km/hr

B. 7.94 km/hr

C. 79.4 km/hr

D. 794 km/hr

Discuss

Answer : Option:- C

Explanation :

Discuss here! No Explaination Available for These Question.

Q.

To protect the characteristics of vibratory system, which type of measuring instrument is used

A. Active

B. Passive

C. Contact type

D. Non contact type

Discuss

Answer : Option:- D

Explanation :

Non contact type measuring instruments does not make any physical contact with vibrating body thus preserving its characteristics.

Q.

For static balancing of the enegine, which of the following condition is necessary?

A. Force couple must be close

B. Couple polygon must be close

C. Both (A) and (B)

D. Force couple must be open

Discuss

Answer : Option:- A

Explanation :

Discuss here! No Explaination Available for These Question.

MCQ Questions and Answers on Dynamics of Machinery

Q. Longitudinal vibrations are said to occur when the particles of a body moves

Q. If the unbalanced system is not set right then.

Q. The secondary unbalanced force produced by the reciprocating parts of a certain cylinder of a given engine with crank radius r and connecting rod length l can be considered as equal to primary unbalanced force produced by the same weight having

Q. The receiver in the noise control system is usually

Q. An undamped vibration absorber removes the original resonance peak but introduces

Q. Which type of monitoring system uses stroboscope to measure speed of the machine?

Q. To have natural frequency of instrument very high, spring stiffness should be

Q. Find the critical speed when trailer is travelling over a raod with profile approximated by a sine wave of amplitude 0.08 m and wavelength 14 m. Take natural frequency is 9.9 rad/sec

Q. To protect the characteristics of vibratory system, which type of measuring instrument is used

Q. For static balancing of the enegine, which of the following condition is necessary?

Q.

Longitudinal vibrations are said to occur when the particles of a body moves

Q.

If the unbalanced system is not set right then.

Q.

The secondary unbalanced force produced by the reciprocating parts of a certain cylinder of a given engine with crank radius r and connecting rod length l can be considered as equal to primary unbalanced force produced by the same weight having

Q.

The receiver in the noise control system is usually

Q.

An undamped vibration absorber removes the original resonance peak but introduces

Q.

Which type of monitoring system uses stroboscope to measure speed of the machine?

Q.

To have natural frequency of instrument very high, spring stiffness should be

Q.

Find the critical speed when trailer is travelling over a raod with profile approximated by a sine wave of amplitude 0.08 m and wavelength 14 m. Take natural frequency is 9.9 rad/sec

Q.

To protect the characteristics of vibratory system, which type of measuring instrument is used

Q.

For static balancing of the enegine, which of the following condition is necessary?