Question Set 193

 

21. 

Which of the following has threads at both ends?

A.

Bolt

B.

Tap bolt

C.

Stud

D.

none of these

Answer: Option C

 

22. 

The ratio of the ultimate stress to the design stress is known as

A.

elastic limit

B.

strain

C.

factor of safety

D.

bulk modulus

Answer: Option C

 

23. 

According to Indian standards, the diameter of rivet hole is made larger than the basic size of rivet by

A.

0.5 mm upto rivet diameter of 24 mm

B.

1 mm for rivet diameter from 27 mm to 36 mm

C.

2 mm for rivet diameter from 39 mm to 48 mm

D.

all of the above

Answer: Option C

 

24. 

The cam follower extensively used in air-craft engines is

A.

knife edge follower

B.

flat faced follower

C.

spherical faced follower

D.

roller follower

Answer: Option D

 

25. 

The minor diameter of a screw thread is also known as outside or nominal diameter.

A.

Correct

B.

Incorrect

Answer: Option B

26. 

A pressure vessel is said to be a thick shell, if the ratio of wall thickness to its diameter is

A.

equal to 1/10

B.

less than 1/10

C.

greater than 1/10

D.

none of these

Answer: Option C

 

27. 

The radial stress across the thickness of a thick cylinder is maximum at the inner surface and zero at the outer surface.

A.

True

B.

False

Answer: Option A

 

28. 

The diameter of the rivet hole is usually __________ the nominal diameter of the rivet.

A.

equal to

B.

less than

C.

more than

Answer: Option C

 

29. 

The resilience of a bolt may be increased by

A.

increasing its shank diameter

B.

increasing its length

C.

decreasing its shank diameter

D.

decreasing its length

Answer: Option B

 

30. 

In worm, gears, pitch lead angle is

A.

half the angle between two inclined faces in axial plane

B.

the angle between the tangent to the pitch helix and the plane of rotation

C.

the angle between the tangent to the pitch helix and an element of the cylinder

D.

none of the above

Answer: Option B