Machine Design MCQ Questions & Answers

1

I.S. specifies following total number of grades of tolerances

A) 18 B) 16 C) 20 D) 22

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Answer & Solution

Answer: Option A

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2

When a bolt and nut is made of mild steel, then the effective height of nut is made equal to (where d = Nominal diameter of bolt)

A) 0.5 d B) 0.75 d C) d D) 1.25 d

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Answer & Solution

Answer: Option C

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3

The function of cutting oil when threading a pipe is to

A) Provide cooling action B) Lubricate the dies C) Help removes chips D) All of the above

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Answer & Solution

Answer: Option D

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4

The dedendum is the radial distance from the

A) Pitch circle to the top of a tooth B) Pitch circle to the bottom of a tooth C) Top of a tooth to the bottom of a tooth D) Addendum circle to the clearance circle

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Answer & Solution

Answer: Option B

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5

If threads on a bolt are left hand, threads on nut will be

A) Right hand with same pitch B) Left hand with same pitch C) Could be left or right hand D) Right hand with fine pitch

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Answer & Solution

Answer: Option B

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6

If a load W is applied instantaneously on a bar; Then the stress induced in bar will

A) Be independent of ratio of mass of load W to mass of bar (y) B) Increase with increase in y C) Decrease with decrease in y D) Depend on other considerations

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Answer & Solution

Answer: Option A

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7

Plastic flow in ductile materials

A) Increases the seriousness of static loading stress concentration B) Lessens the seriousness of static loading stress concentration C) Has no effect on it D) Depends on other considerations

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Answer & Solution

Answer: Option B

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8

Which of the following screw thread is used for power transmission in one direction only?

A) Square threads B) Multiple threads C) Acme threads D) Buttress threads

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Answer & Solution

Answer: Option D

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9

When a close coiled helical spring is compressed, its wire is subjected to

A) Tension B) Shear C) Compression D) All of the above

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Answer & Solution

Answer: Option A

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10

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

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Answer & Solution

Answer: Option D

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Machine Design MCQ Questions & Answers | Mechanical Engineering