Question Set 198

21. 

Which of the following welded joint is designed for shear strength ?

A.

Transverse fillet welded joint

B.

Parallel fillet welded joint

C.

Butt welded joint

D.

all of these

Answer: Option B

 

22. 

In designing a connecting rod, it is considered like __________ for buckling about X-axis.

A.

both ends hinged

B.

both ends fixed

C.

one end fixed and the other end hinged

D.

one end fixed and the other end free

Answer: Option A

 

23. 

The material commonly used for crane hooks is

A.

cast iron

B.

wrought iron

C.

mild steel

D.

aluminium

Answer: Option B

 

24. 

The eye bolts are used for

A.

transmission of power

B.

locking devices

C.

lifting and transporting heavy machines

D.

absorbing shocks and vibrations

Answer: Option C

 

25. 

The endurance or fatigue limit is defined as the maximum value of the stress which a polished standard specimen can withstand without failure, for infinite number of cycles, when subjected to

A.

static load

B.

dynamic load

C.

static as well as dynamic load

D.

completely reversed load

Answer: Option D

26. 

The Wahl's stress factor (K) for springs is given by
(where )

A.

B.

C.

D.

Answer: Option D

 

27. 

According to Rankine's theory, the failure occurs at a point in a member

A.

when the maximum shear stress in a bi-axial stress system reaches the shear stress at elastic limit in a simple tension test

B.

when the maximum principal stress in a bi-axial stress system reaches the elastic limit of the material in a simple tension test

C.

when the strain energy per unit volume in a bi-axial stress system reaches the strain energy at the elastic limit per unit volume as determined from a simple tension test

D.

when the maximum principal strain in a bi-axial stress system reaches the strain at the elastic limit as determined from a simple tension test

Answer: Option B

 

28. 

The dedendum is the radial distance from the

A.

pitch circle to the top of a tooth

B.

pitch circle to the bottom of a tooth

C.

top of a tooth to the bottom of a tooth

D.

addendum circle to the clearance circle

Answer: Option B

 

29. 

In a steam engine, the valve rod is connected to an eccentric rod by means of

A.

cotter joint

B.

knuckle joint

C.

universal joint

D.

flange coupling

Answer: Option B

 

30. 

In helical gears, the distance parallel to the axis, between similar faces of adjacent teeth, is called

A.

normal pitch

B.

axial pitch

C.

diametral pitch

D.

module

Answer: Option B