Question Set 199

31. 

Which of the following formula is used in designing a connecting rod ?

A.

Euler's formula

B.

Rankine's formula

C.

Johnson's straight line formula

D.

Johnson's parabolic formula

Answer: Option B

 

32. 

When a material is subjected to fatigue loading, the ratio of the endurance limit to the ultimate tensile strength is

A.

0.20

B.

0.35

C.

0.50

D.

0.65

Answer: Option C

 

33. 

The lead angle of a worm is 22.5°. Its helix angle will be

A.

22.5°

B.

45°

C.

67.5°

D.

90°

Answer: Option C

 

34. 

The root angle of a bevel gear is equal to

A.

pitch angle - addendum angle

B.

pitch angle + addendum angle

C.

pitch angle - dedendum angle

D.

pitch angle + dedendum angle

Answer: Option C

 

35. 

A thin spherical shell of internal diameter d is subjected to an internal pressure p. If V is the storage capacity of shell, then its diameter will be

A.

B.

C.

D.

Answer: Option B

36. 

The property of a bearing material which has the ability to accomodate small particles of dust, grit etc. without scoring the material of the journal, is called

A.

bondability

B.

embeddability

C.

comformability

D.

fatigue strength

Answer: Option B

 

37. 

The shock resistance of steel is increased by adding

A.

nickel

B.

chromium

C.

nickel and chromium

D.

cobalt and molybedenum

Answer: Option C

 

38. 

The ratio of driving tensions for flat belts, neglecting centrifugal tension, is (where T1, and T2 = Tensions on the tight and slack sides of belt respectively, μ = Coefficient of friction, between the belt and pulley, and θ = Angle of contact)

A.

B.

C.

D.

Answer: Option C

 

39. 

A flange coupling is a type of rigid coupling.

A.

Correct

B.

Incorrect

Answer: Option A

 

40. 

The strength of the un-riveted plate (P) per pitch length is equal to

A.

p.d.σt

B.

p.t.σt

C.

(p - d)σt

D.

(p - d)tσt

Answer: Option B