Machine Design MCQ Questions & Answers

41

According to Indian standards, total numbers of fundamental deviations are

A) 10 B) 15 C) 20 D) 25

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Answer & Solution

Answer: Option D

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42

Resistance to fatigue of a material is measured by

A) Young's modulus B) Coefficient of elasticity C) Elastic limit D) Endurance limit

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Answer & Solution

Answer: Option D

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43

The resistance to fatigue of a material is measured by

A) Elastic limit B) Ultimate tensile strength C) Young's modulus D) Endurance limit

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Answer & Solution

Answer: Option D

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44

Allen bolts are

A) Self locking bolts B) Designed for shock load C) Used in aircraft application D) Provided with hexagonal depression in head

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Answer & Solution

Answer: Option D

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45

Rivets are generally specified by

A) Thickness of plates to be riveted B) Length of rivet C) Diameter of head D) Nominal diameter

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Answer & Solution

Answer: Option D

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46

The size of a gear is usually specified by

A) Pressure angle B) Pitch circle diameter C) Circular pitch D) Diametral pitch

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Answer & Solution

Answer: Option B

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47

An alien bolt is

A) Self locking bolt B) Same as stud C) Provided with hexagonal depression in head D) Used in high speed components

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Answer & Solution

Answer: Option C

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48

The fatigue life of a part can be improved by

A) Electroplating B) Polishing C) Coating D) Shot peening

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Answer & Solution

Answer: Option D

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49

Which of the following property is desirable in parts subjected to shock and impact loads?

A) Strength B) Stiffness C) Brittleness D) Toughness

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Answer & Solution

Answer: Option D

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50

The ratio of driving tensions for flat belts, neglecting centrifugal tension, is (where T₁ and T₂ = Tensions on the tight and slack sides of belt respectively, $$\mu $$ = Coefficient of friction, between the belt and pulley and $$\theta $$ = Angle of contact)

A) $$\frac{{{{\text{T}}_1}}}{{{{\text{T}}_2}}} = \mu \theta $$ B) $$\log \frac{{{{\text{T}}_1}}}{{{{\text{T}}_2}}} = \mu \theta $$ C) $$\frac{{{{\text{T}}_1}}}{{{{\text{T}}_2}}} = {\text{e}}\mu \theta $$ D) $$\frac{{{{\text{T}}_1}}}{{{{\text{T}}_2}}} = \log \mu \theta $$

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Answer & Solution

Answer: Option C

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Machine Design MCQ Questions & Answers | Mechanical Engineering