ENGINEERING MECHANICS QUIZ

According to parallel axis theorem, the moment of inertia of a section about an axis parallel to the axis through center of gravity (i.e. IP) is given by(where, A = Area of the section, IG = Moment of inertia of the section about an axis passing through its C.G., and h = Distance between C.G. and the parallel axis.)

IP = IG / Ah2

IP = IG - Ah2

IP = Ah2 / IG

IP = IG + Ah2

TRUE ANSWER : ?
YOUR ANSWER : ?

The moment of inertia of a rectangular section 3 cm wide and 4 cm deep about X-X axis is

16 cm4

12 cm4

9 cm4

20 cm4

TRUE ANSWER : ?
YOUR ANSWER : ?

If a body is acted upon by a number of coplanar non-concurrent forces, it may

Rotate about itself without moving

Move in any one direction rotating about itself

All of these

Be completely at rest

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Angle of banking

None of these

Angle of friction

Angle of repose

TRUE ANSWER : ?
YOUR ANSWER : ?

The maximum height of a projectile on a horizontal plane, is

u² cos²α/2g

u² cos²α/g

u² sin²α/g

u² sin²α/2g

TRUE ANSWER : ?
YOUR ANSWER : ?

The maximum efficiency of a screw jack is

(1 + tanφ)/(1 - tanφ)

(1 + sinφ)/(1 - sinφ)

(1 - sinφ)/(1 + sinφ)

(1 - tanφ)/(1 + tanφ)

TRUE ANSWER : ?
YOUR ANSWER : ?

The amplitude is always __________ radius of the circle.

None of these

Less than

Greater than

Equal to

TRUE ANSWER : ?
YOUR ANSWER : ?

A differential pulley block has larger and smaller diameters of 100 mm and 80 mm respectively. Its velocity ratio is

5

20

40

10

TRUE ANSWER : ?
YOUR ANSWER : ?

One joule means that

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 g when it displaces a body through 1 cm

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 kg when it displaces a body through 1 m

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

mr²/6

mr²/8

mr²/4

mr²/2

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YOUR ANSWER : ?