Question Set 195

41.

When the connected members are very yielding (soft gasket) as compared to the bolt, then the resultant load on the bolt will be equal to the

A.	initial tension
B.	external load applied
C.	sum of the initial tension and external load applied
D.	initial tension or external load, whichever is greater

Answer: Option C

42.

Which one of the following loading is considered for the design of axles?

A.	Bending moment only
B.	Twisting moment only
C.	Combined bending moment and twisting moments
D.	Combined action of bending moment, twisting moment and axial thrust

Answer: Option A

43.

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

A.	Yes
B.	No

Answer: Option A

44.

A basic hole is one whose

A.	lower deviation is zero
B.	upper deviation is zero
C.	lower and upper deviations are zero
D.	none of these

Answer: Option A

45.

In a flange coupling, the keys are staggered at __________ along the circumference of the shafts in order to divide the weakening effect caused by key ways.

A.	90°
B.	135°
C.	160°
D.	180°

Answer: Option A

46.

A tapered key which fits in a key way in the hub and the bottom of which is shaped to fit the curved surface of the shaft, is known as hollow saddle key.

A.	Correct
B.	Incorrect

Answer: Option A

47.

In levers, leverage is the ratio of

A.	load lifted to the effort applied
B.	mechanical advantage to the velocity ratio
C.	load arm to the effort arm
D.	effort arm to the load arm

Answer: Option D

48.

The diameter of washer is generally taken bigger than the nut size.

A.	True
B.	False

Answer: Option A

49.

Which of the following statement is wrong?

A.	The pitch of rivets is obtained by equating the tearing resistance of the plate to the shearing resistance of the rivets
B.	The pitch of rivets should not be less than 2 d, where d is the diameter of rivet hole
C.	The maximum value of the pitch of rivets for a longitudinal joint of a boiler, as per I.B.R., is given by P_max = C.t + 41.28 mm
D.	According to I.B.R., the thickness of butt strap shall not be less than 5 mm

Answer: Option D

50.

If a shaft made from ductile material is subjected to combined bending and twisting moment, calculations based on which one of the following failure theories will give the most conservative value?

A.	Maximum principal stress theory
B.	Maximum shear stress theory
C.	Maximum strain energy theory
D.	Maximum distortion energy theory

Answer: Option A