Theory Of Machine MCQ Questions & Answers

31

A point B on a rigid link AB moves with respect to A with angular velocity $$\omega $$ rad/s. The radial component of the acceleration of B with respect to A, is (where vBA = Linear velocity of B with respect to A)

A) vBA × AB B) $$\frac{{{\text{vBA}}}}{{{\text{AB}}}}$$ C) v²BA D) $$\frac{{{{\text{v}}^2}{\text{BA}}}}{{{\text{AB}}}}$$

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Answer & Solution

Answer: Option D

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32

The power from the engine to the rear axle of an automobile is transmitted by means of

A) Worm and worm wheel B) Spur gears C) Bevel gears D) Hooke's joint

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Answer & Solution

Answer: Option D

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33

Which of the following governor is used to drive a gramophone?

A) Watt governor B) Porter governor C) Pickering governor D) Hartnell governor

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Answer & Solution

Answer: Option C

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34

The following is the inversion of slider crank chain mechanism

A) Whitworth quick return mechanism B) Hand pump C) Oscillating cylinder engine D) All of the above

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Answer & Solution

Answer: Option D

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35

The partial balancing means

A) Balancing partially revolving masses B) Balancing partially reciprocating masses C) Best balancing of engines D) All of these

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Answer & Solution

Answer: Option B

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36

An imaginary circle which by pure rolling action, gives the same motion as the actual gear, is called

A) Addendum circle B) Dedendum circle C) Pitch circle D) Clearance circle

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Answer & Solution

Answer: Option C

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37

The balancing of a rigid rotor can be achieved by appropriately placing balancing masses in

A) A single plane B) Two planes C) Three planes D) Four planes

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Answer & Solution

Answer: Option B

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38

Which one of the following can completely balance several masses revolving in different planes on a shaft?

A) A single mass in different planes B) Two masses in any two planes C) A single mass in one of the planes of the revolving masses D) Two equal masses in any two planes

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Answer & Solution

Answer: Option B

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39

The frictional torque transmitted in a flat collar bearing, considering uniform pressure, is (where r₁ and r₂ = External and internal radii of collar respectively)

A) $$\frac{1}{2}\mu {\text{W}}\left( {{{\text{r}}_1} + {{\text{r}}_2}} \right)$$ B) $$\frac{2}{3}\mu {\text{W}}\left( {{{\text{r}}_1} + {{\text{r}}_2}} \right)$$ C) $$\frac{1}{2}\mu {\text{W}}\left( {\frac{{{\text{r}}_1^3 - {\text{r}}_2^3}}{{{\text{r}}_1^2 - {\text{r}}_2^2}}} \right)$$ D) $$\frac{2}{3}\mu {\text{W}}\left( {\frac{{{\text{r}}_1^3 - {\text{r}}_2^3}}{{{\text{r}}_1^2 - {\text{r}}_2^2}}} \right)$$

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Answer & Solution

Answer: Option D

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40

The frictional torque transmitted in a flat collar bearing, considering uniform wear, is (where r₁ and r₂ = External and internal radii of collar respectively)

A) $$\frac{1}{2}\mu {\text{W}}\left( {{{\text{r}}_1} + {{\text{r}}_2}} \right)$$ B) $$\frac{2}{3}\mu {\text{W}}\left( {{{\text{r}}_1} + {{\text{r}}_2}} \right)$$ C) $$\frac{1}{2}\mu {\text{W}}\left( {\frac{{{\text{r}}_1^3 - {\text{r}}_2^3}}{{{\text{r}}_1^2 - {\text{r}}_2^2}}} \right)$$ D) $$\frac{2}{3}\mu {\text{W}}\left( {\frac{{{\text{r}}_1^3 - {\text{r}}_2^3}}{{{\text{r}}_1^2 - {\text{r}}_2^2}}} \right)$$

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Answer & Solution

Answer: Option A

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Theory Of Machine MCQ Questions & Answers | Mechanical Engineering