Questions and answers for exam Preparation

MCQs

Total Questions : 2607 | Page 47 of 261 pages

Question 461. The longitudinal stress is __________ of the circumferential stress.

One-half
Two-third
Three-fourth
Double

Discuss Question

Answer: Option A. -> One-half

Question 462. The distribution of the forces along the length of key fitted in a shaft

Varies linearly
Is uniform throughout
Varies exponentially, being more near the torque-input end
Varies exponentially, being less near the torque-input end

Discuss Question

Answer: Option C. -> Varies exponentially, being more near the torque-input end

Question 463. The constant factor in case of R10 series of preferred numbers is

1.06
1.12
1.26
1.58

Discuss Question

Answer: Option C. -> 1.26

Question 464. The ratio of driving tensions in V-belt drives is __________ flat belt drives.

Equal to
sin α times more than
sin α times less than
cosec α times more than

Discuss Question

Answer: Option D. -> cosec α times more than

Question 465. Which of the following is an anti-friction bearing?

Journal bearing
Pedestal bearing
Collar bearing
Needle bearing

Discuss Question

Answer: Option D. -> Needle bearing

Question 466. The anti-friction bearings

Have low starting and low running friction at moderate speeds
Have high initial cost
Can carry both radial and thrust loads
All of these

Discuss Question

Answer: Option D. -> All of these

Question 467. Elastic nut is a locking device in which

One small nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
A slot is cut partly in middle of nut and then slot reduced by tightening a screw
Hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is stewed on the bolt causing a tight grip
Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin splitted and bent in reverse direction at other end

Discuss Question

Answer: Option C. -> Hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is stewed on the bolt causing a tight grip

Question 468. Jam nut is a locking device in which

One smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
A slot is cut partly in middle of nut and then slot reduced by tightening a screw
A hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip
Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter spitted and bent in reverse direction at other end

Discuss Question

Answer: Option A. -> One smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming

Question 469. Split nut is a locking device in which

One smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
A slot is cut partly in middle of nut and then slot reduced by tightening screw
A hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip
Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin splitted and bent in reverse direction at the other end

Discuss Question

Answer: Option B. -> A slot is cut partly in middle of nut and then slot reduced by tightening screw

Question 470. Castle nut is a locking device in which

One smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
A slot is cut partly is middle of nut and then slot reduced by tightening a screw
A hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip
Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin spitted and bent in reverse direction at other end

Discuss Question

Answer: Option D. -> Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin spitted and bent in reverse direction at other end