Questions and answers for exam Preparation

MCQs

Total Questions : 2607 | Page 70 of 261 pages

Question 691. Which of the following statement is wrong?

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

Discuss Question

Answer: Option D. -> According to I.B.R., the thickness of butt strap shall not be less than 5 mm
Answer: (d).According to I.B.R., the thickness of butt strap shall not be less than 5 mm

Question 692. In a bolt, the plane of shear should be across the threaded portion of the shank.

Correct
Incorrect
Can't say
None of these

Discuss Question

Answer: Option B. -> Incorrect
Answer: (b).Incorrect

Question 693. The temperature required for full annealing in hyper-eutectoid steel is

50°C above upper critical temperature
50°C below upper critical temperature
50°C above lower critical temperature
50°C below lower critical temperature

Discuss Question

Answer: Option C. -> 50°C above lower critical temperature
Answer: (c).50°C above lower critical temperature

Question 694. The effect of key ways on a shaft is to reduce its load carrying capacity and to increase its torsional rigidity.

True
False
Can't say
None of these

Discuss Question

Answer: Option B. -> False
Answer: (b).False

Question 695. The efficiency of a riveted joint is equal to

Pt/P
Ps/P
Pc/P
least of Pt, Ps and Pc/P

Discuss Question

Answer: Option D. -> least of Pt, Ps and Pc/P
Answer: (d).least of Pt, Ps and Pc/P

Question 696. When a material is subjected to fatigue loading, the ratio of the endurance limit to the ultimate tensile strength is

0.20
0.35
0.50
0.65

Discuss Question

Answer: Option C. -> 0.50
Answer: (c).0.50

Question 697. Which of the following formula is used in designing a connecting rod ?

Euler's formula
Rankine's formula
Johnson's straight line formula
Johnson's parabolic formula

Discuss Question

Answer: Option B. -> Rankine's formula
Answer: (b).Rankine's formula

Question 698. A hollow saddle key is

a taper key which fits half in the key way of hub and half in the key way of shaft
a taper key which fits in a key way of the hub and is flat on the shaft
a taper key which fits in a key way of the hub and the bottom of the key is shaped to fit the curved surface of the shaft
provided in pairs at right angles and each key is to withstand torsion in one direction only

Discuss Question

Answer: Option C. -> a taper key which fits in a key way of the hub and the bottom of the key is shaped to fit the curved surface of the shaft
Answer: (c).a taper key which fits in a key way of the hub and the bottom of the key is shaped to fit the curved surface of the shaft

Question 699. Pitch point of a cam is

a point on the pitch curve having minimum pressure angle
a point on the pitch curve having maximum pressure angle
any point on the pitch curve
any point on the pitch circle

Discuss Question

Answer: Option B. -> a point on the pitch curve having maximum pressure angle
Answer: (b).a point on the pitch curve having maximum pressure angle

Question 700. In the levers of __________ type, the mechanical advantage is less than one.