Test: Design of Bearings - 1 - Mechanical Engineering MCQ

For increased radial load  

for increased thrust load

When there is less radial space

to compensate for angular misalignment 

4000  

2000  

1000  

500  

The maximum static radial load that can be applied without causing any plastic deformation of bearing components.

The radial load at which 90% of the group of apparently identical bearings run for one million revolutions before the first evidence of failure.

The maximum radial load that can be applied during operation without any plastic deformation of bearing components.

A combination of radial and axial loads that can be applied without any plastic deformation. 

Oil viscosity is to be decreased  

oil viscosity is to be increased

Oil viscosity index is to be increased  

oil viscosity index is to be decreased 

Increases with increases in load

is independent of load        

Decreases with increase in load

may increase or decrease with increase in load 

1 only    

2 only

Both 1 and 2    

Neither 1 nor 2 

Bore is common but width is increasing

Outer diameter is common but bore is increasing

Width is common but outer diameter is decreasing

Bore is common but outer diameter is decreasing 

100% of the bearings of the group

95% of the bearings of the group

90% of the bearings of the group

66.66% of the bearings of the group 

Hydrostatic bearings  

Squeeze film bearings

Antifriction bearings  

Grease lubrication bearings 

Directly proportional to number of balls in a row and diameter of ball

Directly proportional to square of ball diameter and inverse of number of rows of balls

Directly proportional to number of balls in a row and square of diameter of ball

Inversely proportional to square of diameter of ball and directly proportional to number of balls in a row 

Separate the two races    

Separate the balls from the inner race

Separate the outer race from the balls

Ensure that the balls do not cluster at one point and maintain proper relative angular positions

Both A and R are individually true and R is the correct explanation of A

Both A and R are individually true but R is not the correct explanation of A  

A is true but R is false

A is false but R is true 

Pitting  

wearing  

spalling  

scuffing 

Both A and R are individually true and R is the correct explanation of A

Both A and R are individually true but R is not the correct explanation of A  

A is true but R is false

A is false but R is true 

A

B

C

D

Radial load only    

Axial load only

Both radial and axial loads and the ratio of these being less than unity.

Both radial and axial loads and the ratio of these being greater than unity. 

1 and 2  

2 and 3  

2 and 4  

1 and 4 

Slider velocity    

wedge shaped oil film

Oil compressibility  

oil viscosity 

Remains unchanged  

Gets doubled  

Gets reduced to one-fourth of original value

Gets reduced to half of original value 

Easy to assemble              

Relatively low price          

Superior load carrying capacity at higher speeds  

Less frictional resistance