Theory Of Machine MCQ Questions & Answers

81

The ratio of height of Porter governor (when length of arms and links are equal) to the height of Watt's governor is (where m = Mass of the ball and M = Mass on the sleeve)

A) $$\frac{{\text{m}}}{{{\text{m}} + {\text{M}}}}$$ B) $$\frac{{\text{M}}}{{{\text{m}} + {\text{M}}}}$$ C) $$\frac{{{\text{m}} + {\text{M}}}}{{\text{m}}}$$ D) $$\frac{{{\text{m}} + {\text{M}}}}{{\text{M}}}$$

Discuss

Answer & Solution

Answer: Option C

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

82

In vibration isolation system, if $$\frac{\omega }{{\omega {\text{n}}}} > 1,$$ then the phase difference between the transmitted force and the disturbing force is

A) 0° B) 90° C) 180° D) 270°

Discuss

Answer & Solution

Answer: Option C

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

83

For fluctuating loads, well suited bearing is

A) Ball bearing B) Roller bearing C) Needle roller bearing D) Thrust bearing

Discuss

Answer & Solution

Answer: Option C

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

84

The critical speed of a shaft in revolution per second is __________ as that of natural frequency of transverse vibration.

A) Same B) Different C) Unpredictable D) None of these

Discuss

Answer & Solution

Answer: Option A

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

85

The maximum or minimum value of the swaying couple is

A) $$ \pm {\text{cm}}{\omega ^2}{\text{r}}$$ B) $$ \pm {\text{a}}\left( {1 - {\text{c}}} \right){\text{m}}{\omega ^2}{\text{r}}$$ C) $$ \pm \frac{{\text{a}}}{{\sqrt 2 }}\left( {1 - {\text{c}}} \right){\text{m}}{\omega ^2}{\text{r}}$$ D) $$ \pm 2{\text{a}}\left( {1 - {\text{c}}} \right){\text{m}}{\omega ^2}{\text{r}}$$

Discuss

Answer & Solution

Answer: Option C

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

86

Creep in belt drive is due to

A) Material of the pulley B) Material of the belt C) Larger size of the driver pulley D) Uneven extensions and contractions due to varying tension

Discuss

Answer & Solution

Answer: Option D

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

87

A thin circular disc is rolling with a uniform linear speed, along a straight path on a plane surface. Which of the following statement is correct in this regard?

A) All points of the disc have the same velocity B) The centre of the disc has zero acceleration C) The centre of the disc has centrifugal acceleration D) The point on the disc making contact with the plane surface has zero acceleration

Discuss

Answer & Solution

Answer: Option B

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

88

In full depth involute system, the smallest number of teeth in a pinion which meshes with rack without interference is

A) 12 B) 16 C) 25 D) 32

Discuss

Answer & Solution

Answer: Option D

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

89

The stress induced in a body will be shear stress, when it is subjected to

A) Longitudinal vibrations B) Transverse vibrations C) Torsional vibrations D) None of these

Discuss

Answer & Solution

Answer: Option C

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

90

The sense of Coriolis component is such that it

A) Leads the sliding velocity vector by 90° B) Lags the sliding velocity vector by 90° C) Is along the sliding velocity vector D) Leads the sliding velocity vector by 180°

Discuss

Answer & Solution

Answer: Option A

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

Theory Of Machine MCQ Questions & Answers | Mechanical Engineering