Applied Mechanics MCQs

Question 1

Moment of interia of a squares of side b about an axis through its centre of gravity, is

Accepted Answer

112

Answer

b3 / 4

Answer

b4/3

Answer

b4/8

Question 2

M.I. of a thin ring (external diameter D, internal diameter d) about an axis perpendicular to the plane of the ring, is

Accepted Answer

(c) rt (D4 + d4) 32

Answer

TC (D4 4_ d4) 64

Question 3

The moment of inertia of the shaded portion of the area shown in Fig. 5.1 about the X-axis, is

Accepted Answer

429.34 cm4

Answer

229.34 cm

Answer

329.34 cm4

Answer

529.34 cm4.

Question 4

The M.I, of a thin spherical shell, is

Accepted Answer

2/3Mr2

Answer

Mr4I2

Answer

Mr2

Answer

2J5Mr2

Question 5

M.I. of solid sphere, is

Accepted Answer

Mr2

Answer

2/3Mr2

Answer

215Mr2

Answer

itr4/2

Question 6

The maximum frictional force which comes into play, when a body just begins to slide over the surface of a an other body, is known

Accepted Answer

limiting friction

Answer

sliding friction

Answer

rolling friction

Answer

none of these.

Question 7

The angle of friction is :

Accepted Answer

The angle between the normal reaction and the resultant of normal raction and limiting friction

Answer

The ratio of the friction and the normal reaction

Answer

The force of friction when the body is in motion

Answer

The force of friction at which the body is just about to move.

Question 8

The angle which an inclined surface makes with the horiontal when a body placed on it is on the point of moving down, is called

Accepted Answer

angle of repose

Answer

angle of friction

Answer

angle of inclination

Answer

none of these.

Question 9

Which one of the following statements is true ?

Accepted Answer

All the above.

Answer

The tangent of the angle of friction is equal to coefficeint of friction

Answer

The angle of repose is equal to angle of friction

Answer

The tangent of the angle of repose is equal to coefficient of friction