ENGINEERING MECHANICS QUIZ

When a body of mass moment of inertia 'I' (about a given axis) is rotated about that axis with an angular velocity to, then the kinetic energy of rotation is

0.5 Iω2

Iω2

0.5 Iω

Iω

TRUE ANSWER : ?
YOUR ANSWER : ?

The periodic time of one oscillation for a simple pendulum is (where l = Length of the pendulum.)

2π. √(l/g)

(1/2π). √(g/l)

(1/2π). √(l/g)

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

The potential energy of a vertically raised body is __________ the kinetic energy of a vertically falling body.

Equal to

Less than

Greater than

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

When two elastic bodies collide with each other,

The two bodies tend to compress and deform at the surface of contact

The two bodies begin to regain their original shape

The two bodies will momentarily come to rest after collision

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

The force applied on a body of mass 100 kg to produce an acceleration of 5 m/s2, is

20 N

500 N

None of these

100 N

TRUE ANSWER : ?
YOUR ANSWER : ?

The center of percussion of a solid cylinder of radius ‘r’ resting on a horizontal plane will be

r/A

2r/3

r/2

3r/2

TRUE ANSWER : ?
YOUR ANSWER : ?

If rain is falling in the opposite direction of the movement of a pedestrian, he has to hold his umbrella

More inclined when standing

Less inclined when standing

Less inclined when moving

More inclined when moving

TRUE ANSWER : ?
YOUR ANSWER : ?

The time of flight (t) of a projectile on a horizontal plane is given by

t = 2u/g.sinα

t = 2u. tanα/g

t = 2u. sinα/g

t = 2u. cosα/g

TRUE ANSWER : ?
YOUR ANSWER : ?

A framed structure is imperfect, if the numbers of members are __________ (2j - 3).

Either (B) or (C)

Greater than

Equal to

Less than

TRUE ANSWER : ?
YOUR ANSWER : ?

The velocity ratio of a simple wheel and axle with D and d as the diameters of effort wheel and load axle, is

D - d

D + d

D / d

D × d

TRUE ANSWER : ?
YOUR ANSWER : ?