Machine Design MCQ Questions & Answers

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Each section contains 100 MCQs on Machine Design .

In the case of an elastic bar fixed at upper end and loaded by a falling weight at lower end, the shock load produced can be decreased by

A) Decreasing the cross-section area of bar B) Increasing the cross-section area of bar C) Remain unaffected with cross-section area D) Would depend upon other factors

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

A bolt of uniform strength can be developed by

A) Keeping the core diameter of threads equal to the diameter of unthreaded portion of the bolt B) Keeping the core diameter smaller than the diameter of the unthreaded portion C) Keeping the nominal diameter of threads equal to the diameter of unthreaded portion of the bolt D) None of the above

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

The power transmitted by the belt drive can be increased by

A) Increasing the initial tension in the belt B) Dressing the belt to increase the coefficient of friction C) Increasing wrap angle by using idler pulley D) All of the above methods

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

The shock absorbing capacity of a bolt can be increased by

A) Tightening it properly B) Increasing shank diameter C) Grinding the shank D) Making shank diameter equal to core diameter of thread

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

Pick up wrong statement. Fatigue strength can be increased by

A) Cold working B) Shot peening C) Grinding and lapping surface D) Hot working

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

The taper on key is given on

A) Bottom side only B) Top side only C) On both sides D) Any side

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

A type of brake commonly used in motor cars is a

A) Shoe brake B) Band and block brake C) Band brake D) Internal expanding brake

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

When a load W is applied suddenly on a bar of cross-sectional area A, the stress induced in the bar will be

A) $$\frac{{\text{W}}}{{\text{A}}}$$ B) $$\frac{{\text{W}}}{{2{\text{A}}}}$$ C) $$\frac{{2{\text{W}}}}{{\text{A}}}$$ D) $$\frac{{3{\text{W}}}}{{\text{A}}}$$

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

In helical gears, the right hand helixes on one gear will mesh __________ helixes on the other gear.

A) Right hand B) Left hand C) Both A and B D) None of these

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

100

The pitch diameter is the __________ diameter of an external or internal screw thread.

A) Effective B) Smallest C) Largest D) None of these

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

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Machine Design MCQ Questions & Answers | Mechanical Engineering