Machine Design MCQs

Question 1

A sliding bearing which operates without any lubricant present, is called

Accepted Answer

Zero film bearing

Answer

Boundary lubricated bearing

Answer

Hydrodynamic lubricated bearing

Answer

Hydrostatic lubricated bearing

Question 2

Residual stress in materials

Accepted Answer

Is independent of external loads

Answer

Acts when external load is applied

Answer

Becomes zero when external load is removed

Answer

Is always harmful

Question 3

The stretching in a belt can be controlled by __________ the stress in the belt.

Accepted Answer

Reducing

Answer

Increasing

Answer

Both A and B

Answer

None of these

Question 4

When compared to the rod of the same diameter and material, a wire rope

Accepted Answer

Has a much smaller load carrying capacity

Answer

Is less flexible

Answer

Does not provide much warning before failure

Answer

Provides much greater time for remedial action before failure

Question 5

The design of shafts made of brittle materials is based on

Accepted Answer

Rankine's theory

Answer

Guest's theory

Answer

St. Venant's theory

Answer

Von Mises's theory

Question 6

The bearing characteristic number in a hydrodynamic bearing depends upon

Accepted Answer

Viscosity, speed and bearing pressure

Answer

Length, width and load

Answer

Length, width and speed

Answer

Viscosity, speed and load

Question 7

Spring stiffness is

Accepted Answer

Load required to produce unit deflection

Answer

Ratio of coil diameter to wire diameter

Answer

Its capability of storing energy

Answer

Its ability to absorb shocks

Question 8

The coefficient of friction in belt drive depends upon

Accepted Answer

Materials of belt and pulley

Answer

Material of belt

Answer

Material of pulley

Answer

Belt velocity

Question 9

The power transmitted by belt drive depends upon

Accepted Answer

All of the above

Answer

Belt velocity

Answer

Initial belt tension

Answer

Arc of contact