Question Set 183

21. 

Screws jacks have multiple threads.

A.

Agree

B.

Disagree

Answer: Option B

 

22. 

In an ordinary bolt, the effect of the impulsive loads applied axially is concentrated on the cross-sectional area at the root of the threads.

A.

Yes

B.

No

Answer: Option A

 

23. 

The radial distance of a tooth from the pitch circle to the top of the tooth is called

A.

dedendum

B.

addendum

C.

clearance

D.

working depth

Answer: Option B

 

24. 

In a gear, having involute teeth, the normal to the involute is a tangent to the

A.

pitch circle

B.

base circle

C.

addendum circle

D.

dedendum circle

Answer: Option B

 

25. 

Which of the following statement is correct ?

A.

The toughness of a material increases when it is heated.

B.

The shear stress in a beam varies from zero at the neutral surface and maximum at the outer fibres.

C.

The stress concentration in static loading is more serious in brittle materials and less serious in ductile materials.

D.

The stress concentration in static loading is more serious in ductile materials and less serious in brittle materials.

Answer: Option C

26. 

The metal suitable for bearings subjected to light loads is

A.

silicon bronze

B.

white metal

C.

monel metal

D.

phosphor bronze

Answer: Option D

 

27. 

A connecting rod subjected to an axial load may buckle in the plane perpendicular to the plane of motion of the connecting rod.

A.

Correct

B.

Incorrect

Answer: Option A

 

28. 

Which of the following is an antifriction bearing?

A.

journal bearing

B.

pedestal bearing

C.

collar bearing

D.

needle bearing

Answer: Option D

 

29. 

A connecting rod is four times strong in buckling about Y-axis than about X-axis.

A.

Agree

B.

Disagree

Answer: Option A

 

30. 

In designing a sleeve coupling, length of the sleeve is taken as (where d = Diameter of the shaft)

A.

d + 17 mm

B.

2 d + 13 mm

C.

2 d + 20 mm

D.

3.5 d

Answer: Option D