Theory Of Machine MCQ Questions & Answers

11

One end of a helical spring is fixed while the other end carries the load W which moves with simple harmonic motion. The frequency of motion is given by (where $$\delta $$ = Deflection of the spring)

A) $$2\pi \sqrt {\frac{{\text{g}}}{\delta }} $$ B) $$\frac{1}{{2\pi }}\sqrt {\frac{{\text{g}}}{\delta }} $$ C) $$2\pi \sqrt {\frac{\delta }{{\text{g}}}} $$ D) $$\frac{1}{{2\pi }}\sqrt {\frac{\delta }{{\text{g}}}} $$

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

12

In vibration isolation system, if $$\frac{\omega }{{\omega {\text{n}}}} < 2,$$ then for all values of damping factor, the transmissibility will be (where $$\omega $$ = Angular speed of the system, $$\omega {\text{n}}$$ = Natural frequency of vibration of the system)

A) Less than unity B) Equal to unity C) Greater than unity D) Zero

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

13

Which of the following would constitute a link?

A) Piston, piston rod and cross head B) Piston and piston rod C) Piston rod and cross head D) Piston, crank pin and crank shaft

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

14

The ratio of the maximum displacement of the forced vibration to the deflection due to the static force, is known as

A) Damping factor B) Damping coefficient C) Logarithmic decrement D) Magnification factor

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

15

In a mechanism, the fixed instantaneous centers are those centers which

A) Remain in the same place for all configurations of the mechanism B) Vary with the configuration of the mechanism C) Moves as the mechanism moves, but joints are of permanent nature D) None of the above

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

16

The moment on the pulley which produces rotation is called

A) Inertia B) Momentum C) Moment of momentum D) Torque

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

17

The tendency of a body to resist change from rest or motion is known as

A) Mass B) Friction C) Inertia D) Resisting force

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

18

The length of a simple pendulum which gives the same frequency as the compound pendulum, is

A) $${\text{kG}} + {l_1}$$ B) $${\text{k}}{{\text{G}}^2} + {l_1}$$ C) $$\frac{{{\text{k}}{{\text{G}}^2} + l_1^2}}{{{l_1}}}$$ D) $$\frac{{{\text{kG}} + l_1^2}}{{{l_1}}}$$

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

19

For the brake to be self locking, the force P at C shown in the below figure, should
Theory of Machine mcq question image

A) Be zero B) Act in upward direction C) Act in downward direction D) None of these

Discuss

Answer & Solution

Answer: Option A

Solution:

20

When the pitching of a ship is __________ the effect of gyroscopic couple acting on it will be to move the ship towards port side.

A) Upward B) Downward C) Forward D) Backward

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

Theory Of Machine MCQ Questions & Answers | Mechanical Engineering