Question Set 182

11. 

The rolling contact bearings as compared to sliding contact bearings have

A.

small overall dimensions

B.

accuracy of shaft alignment

C.

low starting and low running friction except at very high speeds

D.

all of the above

Answer: Option D

 

12. 

The maximum normal stress theory is used for

A.

brittle materials

B.

ductile materials

C.

plastic materials

D.

non-ferrous materials

Answer: Option A

 

13. 

When two non-intersecting and non-coplaner shafts are connected by gears, the arrangement is known as

A.

spur gearing

B.

helical gearing

C.

bevel gearing

D.

spiral gearing

Answer: Option D

 

14. 

When a nut is tightened by placing a washer below it, the bolt will be subjected to

A.

tensile stress

B.

compressive stress

C.

shear stress

D.

none of these

Answer: Option A

 

15. 

A locking device extensively used in marine type connecting rod ends is a

A.

jam nut

B.

castle nut

C.

sawn nut

D.

ring nut

Answer: Option D

 

16. 

The difference between the tooth space and the tooth thickness as measured on the pitch circle, is called

A.

working depth

B.

clearance

C.

face width

D.

backlash

Answer: Option D

 

17. 

When a load W is suddenly applied to a bar of weight W1, the stress induced in the bar will increase with the increase in weight W1.

A.

Correct

B.

Incorrect

Answer: Option B

 

18. 

The endurance limit for a mirror polished material will be __________ as compared to unpolished material.

A.

same

B.

less

C.

more

Answer: Option C

 

19. 

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

A.

zero film bearing

B.

boundary lubricated bearing

C.

hydrodynamic lubricated bearing

D.

hydrostatic lubricated bearing

Answer: Option A

 

20. 

The material used for brake lining should have __________ coefficient of friction.

A.

low

B.

high

Answer: Option B