Machine Design MCQs

Question 1

The notch angle of the Izod impact test specimen is

Accepted Answer

45°

Answer

10°

Answer

20°

Answer

30°

Question 2

For maximum power, the velocity of the belt will be

Accepted Answer

$$\sqrt {\frac{{	ext{T}}}{{3{	ext{m}}}}} $$

Answer

$$\sqrt {\frac{{	ext{T}}}{{	ext{m}}}} $$

Answer

$$\sqrt {\frac{{	ext{T}}}{{2{	ext{m}}}}} $$

Answer

None of these

Question 3

When a bolt is subjected to an external load, the stress induced in the bolt will be

Accepted Answer

Any one of these

Answer

Tensile stress

Answer

Shear stress

Answer

Combined tensile and shear stress

Question 4

The form factor of a helical gear __________ with the increase in the helix angle.

Accepted Answer

Increases

Answer

Decreases

Answer

Remains constant

Answer

None of these

Question 5

A metal pipe of 1 m diameter contains a fluid having a pressure of 1 N/mm2. If the permissible tensile stress in the metal is 20 N/mm2, then the thickness of the metal required for making the pipe will be

Accepted Answer

25 mm

Answer

5 mm

Answer

10 mm

Answer

15 mm

Question 6

The velocity of sliding __________ the distance of the point of contact from the pitch point.

Accepted Answer

Is directly proportional to

Answer

Is inversely proportional to

Answer

Is equal to cos$$\,\varphi $$ multiplied by

Answer

Does not depend upon

Question 7

The flank of the tooth is the

Accepted Answer

Surface of the tooth below the pitch surface

Answer

Surface of the top of the tooth

Answer

Surface of the tooth above the pitch surface

Answer

Width of the tooth measured along the pitch circle

Question 8

The face of the tooth is the

Accepted Answer

Surface of the tooth above the pitch surface

Answer

Surface of the top of the tooth

Answer

Surface of the tooth below the pitch surface

Answer

Width of the tooth measured along the pitch circle

Question 9

The function of the washer is to

Accepted Answer

Provide bearing area

Answer

Fill up the axial gap

Answer

Provide cushioning effect

Answer

Absorb shocks and vibrations