Theory Of Machine MCQ Questions & Answers

61

Longitudinal vibrations are said to occur when the particles of a body moves

A) Perpendicular to its axis B) Parallel to its axis C) In a circle about its axis D) None of these

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Answer & Solution

Answer: Option B

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62

Torsional vibrations are said to occur when the particles of a body moves

A) Perpendicular to its axis B) Parallel to its axis C) In a circle about its axis D) None of these

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Answer & Solution

Answer: Option C

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63

The velocity of the rubbing surface __________ with the distance from the axis of the bearing.

A) Increases B) Decreases C) Remain same D) None of these

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Answer & Solution

Answer: Option A

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64

If $${{{\text{D}}_1}}$$ and $${{\text{D}}_2}$$ be the diameters of driver and driven pulleys, then belt speed is proportional to

A) $$\frac{{{{\text{D}}_1}}}{{{{\text{D}}_2}}}$$ B) $$\frac{{{{\text{D}}_2}}}{{{{\text{D}}_1}}}$$ C) $${{\text{D}}_1} \times {{\text{D}}_2}$$ D) $${{{\text{D}}_1}}$$

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Answer & Solution

Answer: Option D

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65

In a flat collar pivot bearing, the moment due to friction is proportional to

A) $$\frac{{{\text{r}}_1^2 - {\text{r}}_2^2}}{{{{\text{r}}_1} - {{\text{r}}_2}}}$$ B) $$\frac{{{\text{r}}_1^2 - {\text{r}}_2^2}}{{{{\text{r}}_1} + {{\text{r}}_2}}}$$ C) $$\frac{{{\text{r}}_1^3 - {\text{r}}_2^3}}{{{\text{r}}_1^2 - {\text{r}}_2^2}}$$ D) $$\frac{{{\text{r}}_1^3 - {\text{r}}_2^3}}{{{{\text{r}}_1} - {{\text{r}}_2}}}$$

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Answer & Solution

Answer: Option C

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66

In S.H.M., acceleration is proportional to

A) Velocity B) Displacement C) Rate of change of velocity D) All of the above

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Answer & Solution

Answer: Option B

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67

The frictional torque transmitted by a cone clutch is same as that of

A) Flat pivot bearing B) Flat collar bearing C) Conical pivot bearing D) Truncated conical pivot bearing

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Answer & Solution

Answer: Option D

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68

The frictional torque transmitted by a disc or plate clutch is same as that of

A) Flat pivot bearing B) Flat collar bearing C) Conical pivot bearing D) Truncated conical pivot bearing

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Answer & Solution

Answer: Option B

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69

Which of the following has sliding motion?

A) Crank B) Connecting rod C) Crank pin D) Cross-head

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Answer & Solution

Answer: Option D

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70

The type of gears used to connect two non parallel and non intersecting shafts is

A) Spur gear B) Helical gear C) Bevel gear D) Spiral gear

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Answer & Solution

Answer: Option D

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Theory Of Machine MCQ Questions & Answers | Mechanical Engineering