ENGINEERING MECHANICS QUIZ

If tension in the cable supporting a lift moving downwards is half the tension when it is moving upwards, the acceleration of the lift is

g/3

g/2

None of these

g/4

TRUE ANSWER : ?
YOUR ANSWER : ?

Tension in the cable supporting a lift is more when the lift is moving __________ with an acceleration.

None of these

Horizontal

Upwards

Downwards

TRUE ANSWER : ?
YOUR ANSWER : ?

The periodic time of a particle with simple harmonic motion is _________ proportional to the angular velocity.

Inversely

Square root

Directly

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

One joule is equal to

10 N-m

1 N-m

0.1 N-m

100 N-m

TRUE ANSWER : ?
YOUR ANSWER : ?

A machine having an efficiency less than 50%, is known as

Reversible machine

Ideal machine

Neither reversible nor non-reversible machine

Non-reversible machine

TRUE ANSWER : ?
YOUR ANSWER : ?

In order to determine the effects of a force, acting on a body, we must know

Line of action of the force

All of these

Magnitude of the force

Nature of the force i.e. whether the force is push or pull

TRUE ANSWER : ?
YOUR ANSWER : ?

The principle of transmissibility of forces states that, when a force acts upon a body, its effect is

Different at different points on its line of action

Same at every point on its line of action

Minimum, if it acts at the center of gravity of the body

Maximum, if it acts at the center of gravity of the body

TRUE ANSWER : ?
YOUR ANSWER : ?

A machine having an efficiency greater than 50%, is known as

Reversible machine

Neither reversible nor non-reversible machine

Non-reversible machine

Ideal machine

TRUE ANSWER : ?
YOUR ANSWER : ?

The coefficient of friction depends upon

Area of contact

Shape of the surfaces

All of these

Nature of surfaces

TRUE ANSWER : ?
YOUR ANSWER : ?

Moment of inertia of a circular section about its diameter (d) is

πd3/16

πd3/32

πd4/64

πd4/32

TRUE ANSWER : ?
YOUR ANSWER : ?