ENGINEERING MECHANICS QUIZ

The acceleration of a particle moving with simple harmonic motion, at any instant is given by

ω.y

ω3.y

ω2.y

ω2/y

TRUE ANSWER : ?
YOUR ANSWER : ?

Moment of inertia of a circular section about an axis perpendicular to the section is

πd4/32

πd3/16

πd3/32

πd4/64

TRUE ANSWER : ?
YOUR ANSWER : ?

The centre of percussion of the homogeneous rod of length ‘L’ suspended at the top will be

3L/4

L/2

2L/3

L/3

TRUE ANSWER : ?
YOUR ANSWER : ?

The moment of inertia of a solid cylinder of mass 'm', radius 'r' and length 'l' about the longitudinal axis or polar axis is

mr²/8

mr²/6

mr²/2

mr²/4

TRUE ANSWER : ?
YOUR ANSWER : ?

The unit of force in S.I. system of units is

Dyne

Kilogram

Watt

Newton

TRUE ANSWER : ?
YOUR ANSWER : ?

One joule is equal to

10 N-m

100 N-m

1 N-m

0.1 N-m

TRUE ANSWER : ?
YOUR ANSWER : ?

An ideal machine is one whose efficiency is

Between 70 and 80%

Between 60 and 70 %

Between 80 and 90%

1

TRUE ANSWER : ?
YOUR ANSWER : ?

Non-coplanar non-concurrent forces are those forces which

None of these

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

Do not meet at one point and 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

TRUE ANSWER : ?
YOUR ANSWER : ?

From a circular plate of diameter 6 cm is cut out a circle whose diameter is a radius of the plate. Find the e.g. of the remainder from the centre of circular plate

0.5 cm

1.0 cm

2.5 cm

1.5 cm

TRUE ANSWER : ?
YOUR ANSWER : ?

If a given force (or a given system of forces) acting on a body __________ the position of the body, but keeps it in equilibrium, then its effect is to produce internal stress in the body.

Changes periodically

Change

None of these

Does not change

TRUE ANSWER : ?
YOUR ANSWER : ?