MECHANICAL OPERATIONS QUIZ

The moment of inertia of a solid cone of mass ‘m’ and base radius ‘r’ about its vertical axis is

2mr²/5

3mr²/10

4mr²/5

3mr²/5

TRUE ANSWER : ?
YOUR ANSWER : ?

Non-coplanar concurrent forces are those forces which

Meet at one point and their lines of action also lie on the same plane

Meet at one point, but their lines of action do not lie on the same plane

Do not meet at one point, but their lines of action lie on the same plane

Do not meet at one point and their lines of action do not lie on the same plane

TRUE ANSWER : ?
YOUR ANSWER : ?

The ratio of static friction to dynamic friction is always

Greater than one

None of these

Less than one

Equal to one

TRUE ANSWER : ?
YOUR ANSWER : ?

The velocity ratio of a single purchase crab winch can be increased by

Increasing the length of the handle

Increasing the number of teeth of the pinion

Increasing the radius of the load drum

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

One joule means that

Work is done by a force of 1 dyne when it displaces a body through 1 cm

Work is done by a force of 1 N when it displaces a body through 1 m

Work is done by a force of 1 kg when it displaces a body through 1 m

Work is done by a force of 1 g when it displaces a body through 1 cm

TRUE ANSWER : ?
YOUR ANSWER : ?

A smooth cylinder lying on a __________ is in neutral equilibrium.

Convex surface

Curved surface

None of these

Horizontal surface

TRUE ANSWER : ?
YOUR ANSWER : ?

If ‘P’ is the force acting on the body, ‘m’ is the mass of the body and ‘a’ is the acceleration of the body, then according to Newton's second law of motion,

P + m.a = 0

P - m.a = 0

P × m.a = 0

P/m.a = 0

TRUE ANSWER : ?
YOUR ANSWER : ?

Coplanar non-concurrent forces are those forces which __________ at one point, but their lines of action lie on the same plane.

Do not meet

Meet

Either ‘A’ or ‘B’

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

The slope on the road surface generally provided on the curves is known as

Angle of friction

Angle of repose

Angle of banking

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

The force required to move the body up the plane will be minimum if it makes an angle with the inclined plane __________ the angle of friction.

Less than

None of these

Equal to

Greater than

TRUE ANSWER : ?
YOUR ANSWER : ?