Machine Design MCQ Questions & Answers

41

Oil in journal bearing should be applied at the point where load is

A) Nil or lightest B) Maximum C) Average D) Any one of the above

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Answer & Solution

Answer: Option A

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42

Shear stress theory is applicable for

A) Ductile materials B) Brittle materials C) Elastic materials D) All of the above

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Answer & Solution

Answer: Option A

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43

Maximum principal stress theory is applicable for

A) Ductile materials B) Brittle materials C) Elastic materials D) All of the above

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Answer & Solution

Answer: Option B

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44

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

A) First B) Second C) Third D) None of these

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Answer & Solution

Answer: Option C

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45

The surface finish factor for a mirror polished material is

A) 0.45 B) 0.65 C) 0.85 D) 1

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Answer & Solution

Answer: Option D

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46

The circumferential and longitudinal strains in a cylindrical boiler under internal steam pressure are $${\varepsilon _{\text{c}}}$$ and $${\varepsilon _l}$$ respectively. The change in volume of the boiler cylinder per unit volume will be

A) $${\varepsilon _{\text{c}}} + 2{\varepsilon _l}$$ B) $$2{\varepsilon _{\text{c}}} + {\varepsilon _l}$$ C) $${\varepsilon _{\text{c}}} + \varepsilon _l^2$$ D) $$\varepsilon _{\text{c}}^2 + {\varepsilon _l}$$

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Answer & Solution

Answer: Option B

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47

A screw is said to be over hauling screw, if its efficiency is

A) More than 50% B) Less than 50% C) Equal to 50% D) None of these

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Answer & Solution

Answer: Option A

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48

A screw is said to be a self locking screw, if its efficiency is

A) Less than 50% B) More than 50% C) Equal to 50% D) None of these

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Answer & Solution

Answer: Option A

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49

The included angle for the British standard whitworth thread is

A) 29° B) 47.5° C) 55° D) 60°

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Answer & Solution

Answer: Option C

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50

In V-belt drive, belt touches

A) At bottom B) At sides only C) Both at bottom and sides D) Could touch anywhere

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Answer & Solution

Answer: Option B

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Machine Design MCQ Questions & Answers | Mechanical Engineering