Machine Design MCQs

Question 1

Screws used for power transmission should have

Accepted Answer

High efficiency

Answer

Very fine threads

Answer

Low efficiency

Answer

Strong teeth

Question 2

Yield point in fatigue loading as compared to static loading is

Accepted Answer

Lower

Answer

Same

Answer

Higher

Answer

Depends on other factors

Question 3

Which is correct statement? Stress concentration in static loading is

Accepted Answer

Very serious in brittle materials and less serious in ductile materials

Answer

Very serious in ductile materials and less serious in brittle materials

Answer

Equally serious in both types of materials

Answer

Seriousness would depend on other factors

Question 4

When two helical springs of equal lengths are arranged to form a cluster spring, then

Accepted Answer

Both A and B is correct

Answer

Shear stress in each spring will be equal

Answer

Load taken by each spring will be half the total load

Answer

Only A is correct

Question 5

If two springs are in parallel then their overall stiffness will be

Accepted Answer

Double

Answer

Half

Answer

Same

Answer

None of the above

Question 6

When two springs are in series (having stiffness K), the equivalent stiffness will be

Accepted Answer

$$\frac{{	ext{K}}}{2}$$

Answer

K

Answer

2K

Answer

$$\frac{{	ext{K}}}{4}$$

Question 7

In order to remove internal stresses produced by hardening the steel, the process usually adopted is

Accepted Answer

Tempering

Answer

Normalizing

Answer

Annealing

Answer

Spheroidizing

Question 8

The ball bearings are, usually, made from

Accepted Answer

Medium carbon steel

Answer

Low carbon steel

Answer

High carbon steel

Answer

High speed steel

Question 9

When the pulley or other mating piece is required to slide along the shaft, a __________ sunk key is used.

Accepted Answer

Parallel

Answer

Rectangular

Answer

Square

Answer

None of these