Question Set 181

1. 

The rolling contact bearings are known as

A.

thick lubricated bearings

B.

plastic bearings

C.

thin lubricated bearings

D.

antifriction bearings

Answer: Option D

 

2. 

The backlash for spur gears depends upon

A.

module

B.

pitch line velocity

C.

tooth profile

D.

both (a) and (b)

Answer: Option D

 

3. 

The size of a gear is usually specified by

A.

pressure angle

B.

pitch circle diameter

C.

circular pitch

D.

diametral pitch

Answer: Option B

 

4. 

The circumferential and longitudinal strains in a cylindrical boiler under internal steam pressure are εc and εl respectively. The change in volume of the boiler cylinder per unit volume will be

A.

εc + 2εl

B.

2εc + εl

C.

εc + εl2

D.

εc2 + εl

Answer: Option B

 

5. 

The bearings of heavy series have capacity __________ over the medium series.

A.

10 to 20%

B.

20 to 30%

C.

30 to 40%

D.

40 to 50%

Answer: Option B

6. 

A steel containing more than 0.8% carbon is known as eutectoid steel.

A.

Yes

B.

No

Answer: Option B

 

7. 

In leaf springs, the longest leaf is known as

A.

lower leaf

B.

master leaf

C.

upper leaf

D.

none of these

Answer: Option B

 

8. 

The taper on cotter varies from

A.

1 in l5 to 1 in 10

B.

1 in 24 to 1 in 20

C.

1 in 32 to 1 in 24

D.

1 in 48 to 1 in 24

Answer: Option D

 

9. 

Which of the following screw thread is used for power transmission in one direction only.

A.

Acme threads

B.

Square threads

C.

Buttress threads

D.

Multiple threads

Answer: Option C

10. 

When the bearing is subjected to large fluctuations of load and heavy impacts, the bearing characteristic number should be __________ the bearing modulus.

A.

5 times

B.

10 times

C.

15 times

D.

20 times

Answer: Option C