Machine Design MCQ Questions & Answers

41

For a shaft diameter of 100 mm, the number of bolts in a flange coupling should be

A) 4 B) 6 C) 8 D) 10

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Answer & Solution

Answer: Option A

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42

For a shaft diameter of 200 mm, the number of bolts in a marine flange coupling should be

A) 8 B) 6 C) 4 D) 10

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Answer & Solution

Answer: Option A

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43

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

A) Bondability B) Embeddability C) Comformability D) Fatigue strength

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Answer & Solution

Answer: Option B

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44

The period during which the cam follower remains at rest, when cam moves, is known as

A) Constant period B) Fixed period C) Dwell period D) Idle period

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Answer & Solution

Answer: Option C

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45

Ball bearing type screws are found in following application

A) Screw jack B) Aeroplane engines C) Crane D) Steering mechanism

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Answer & Solution

Answer: Option D

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46

According to I.B.R., shearing resistance required to shear off the rivet per pitch length (in double shear) is (where n = Number of rivets per pitch length)

A) $$\frac{\pi }{4}{{\text{d}}^2} \times \tau \times {\text{n}}$$ B) $$1.875 \times \frac{\pi }{4}{{\text{d}}^2} \times \tau \times {\text{n}}$$ C) $$2 \times \frac{\pi }{4}{{\text{d}}^2} \times \tau \times {\text{n}}$$ D) $$3 \times \frac{\pi }{4}{{\text{d}}^2} \times \tau \times {\text{n}}$$

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Answer & Solution

Answer: Option B

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47

If the tearing efficiency of a riveted joint is 75%, then the ratio of diameter of rivet to the pitch is equal to

A) 0.2 B) 0.25 C) 0.50 D) 0.6

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Answer & Solution

Answer: Option B

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48

The product of the diametral pitch and circular pitch is equal to

A) 1 B) $$\frac{1}{\pi }$$ C) $$\pi $$ D) $$\pi $$ × number of teeth

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Answer & Solution

Answer: Option C

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49

According to Rankine's theory, the failure occurs at a point in a member

A) When the maximum shear stress in a biaxial stress system reaches the shear stress at elastic limit in a simple tension test B) When the maximum principal stress in a biaxial stress system reaches the elastic limit of the material in a simple tension test C) When the strain energy per unit volume in a biaxial stress system reaches the strain energy at the elastic limit per unit volume as determined from a simple tension test D) When the maximum principal strain in a biaxial stress system reaches the strain at the elastic limit as determined from a simple tension test

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Answer & Solution

Answer: Option B

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50

Pitch point of a cam is

A) A point on the pitch curve having minimum pressure angle B) A point on the pitch curve having maximum pressure angle C) Any point on the pitch curve D) Any point on the pitch circle

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Answer & Solution

Answer: Option B

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Machine Design MCQ Questions & Answers | Mechanical Engineering