Theory Of Machine MCQ Questions & Answers

81

In a system subjected to damped forced vibrations, the ratio of maximum displacement to the static deflection is known as

A) Critical damping ratio B) Damping factor C) Logarithmic decrement D) Magnification factor

Discuss

Answer & Solution

Answer: Option D

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

82

The sense of Coriolis component $$2\omega {\text{v}}$$ is same as that of the relative velocity vector $${\text{v}}$$ rotated at

A) 45° in the direction of rotation of the link containing the path B) 45° in the direction opposite to the rotation of the link containing the path C) 90° in the direction of rotation of the link containing the path D) 180° in the direction opposite to the rotation of the link containing the path

Discuss

Answer & Solution

Answer: Option C

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

83

The pressure angle of a cam is the angle between the direction of the follower motion and a normal to the

A) Pitch circle B) Base circle C) Pitch curve D) Prime circle

Discuss

Answer & Solution

Answer: Option C

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

84

In a ball bearing, ball and bearing forms a

A) Turning pair B) Rolling pair C) Screw pair D) Spherical pair

Discuss

Answer & Solution

Answer: Option B

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

85

Angular acceleration of a link can be determined by dividing the

A) Centripetal component of acceleration with length of link B) Tangential component of acceleration with length of link C) Resultant acceleration with length of link D) All of the above

Discuss

Answer & Solution

Answer: Option B

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

86

Whitworth quick return mechanism is obtained by inversion of

A) Slider crank mechanism B) Kinematic chain C) Five link mechanism D) Roller cam mechanism

Discuss

Answer & Solution

Answer: Option A

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

87

The retardation of a flat faced follower when it has contact at the apex of the nose of a circular arc cam, is given by (where OQ = Distance between the centre of circular flank and centre of nose)

A) $${\omega ^2} \times {\text{OQ}}$$ B) $${\omega ^2} \times {\text{OQ}}\sin \theta $$ C) $${\omega ^2} \times {\text{OQ}}\cos \theta $$ D) $${\omega ^2} \times {\text{OQtan}}\theta $$

Discuss

Answer & Solution

Answer: Option A

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

88

The fundamental equation for correct steering is (where $$\varphi $$ and $$\alpha $$ = Angle through which the axis of the outer wheel and inner wheel turns respectively, c = Distance between the pivots of the front axles and d = Wheel base)

A) $$\sin \varphi + \sin \alpha = \frac{{\text{b}}}{{\text{c}}}$$ B) $$\cos \varphi - \sin \alpha = \frac{{\text{c}}}{{\text{b}}}$$ C) $$\cot \varphi - \cot \alpha = \frac{{\text{c}}}{{\text{b}}}$$ D) $$\tan \varphi + \cot \alpha = \frac{{\text{b}}}{{\text{c}}}$$

Discuss

Answer & Solution

Answer: Option C

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

89

In a drag link quick return mechanism, the shortest link is always fixed. The sum of the shortest and longest link is

A) Equal to sum of other two B) Greater than sum of other two C) Less than sum of other two D) There is no such relationship

Discuss

Answer & Solution

Answer: Option C

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

90

The coefficient of fluctuation of speed is __________ of maximum fluctuation of speed and the mean speed.

A) Sum B) Difference C) Product D) Ratio

Discuss

Answer & Solution

Answer: Option D

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

Theory Of Machine MCQ Questions & Answers | Mechanical Engineering