Questions and answers for exam Preparation

MCQs

Total Questions : 543 | Page 29 of 55 pages

Question 281. The power from the engine to the rear axle of an automobile is transmitted by means of

Worm and worm wheel
Spur gears
Bevel gears
Hooke's joint

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Answer: Option D. -> Hooke's joint

Question 282. The following is the inversion of slider crank chain mechanism

Whitworth quick return mechanism
Hand pump
Oscillating cylinder engine
All of the above

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Answer: Option D. -> All of the above

Question 283. The partial balancing means

Balancing partially revolving masses
Balancing partially reciprocating masses
Best balancing of engines
All of these

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Answer: Option B. -> Balancing partially reciprocating masses

Question 284. An imaginary circle which by pure rolling action, gives the same motion as the actual gear, is called

Addendum circle
Dedendum circle
Pitch circle
Clearance circle

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Answer: Option C. -> Pitch circle

Question 285. The frictional torque transmitted in a flat collar bearing, considering uniform pressure, is (where r1 and r2 = External and internal radii of collar respectively)

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

Discuss Question

Answer: Option D. -> $$\frac{2}{3}\mu {\text{W}}\left( {\frac{{{\text{r}}_1^3 - {\text{r}}_2^3}}{{{\text{r}}_1^2 - {\text{r}}_2^2}}} \right)$$

Question 286. Which one of the following can completely balance several masses revolving in different planes on a shaft?

A single mass in different planes
Two masses in any two planes
A single mass in one of the planes of the revolving masses
Two equal masses in any two planes

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Answer: Option B. -> Two masses in any two planes

Question 287. The frictional torque transmitted in a flat collar bearing, considering uniform wear, is (where r1 and r2 = External and internal radii of collar respectively)

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

Discuss Question

Answer: Option A. -> $$\frac{1}{2}\mu {\text{W}}\left( {{{\text{r}}_1} + {{\text{r}}_2}} \right)$$

Question 288. The balancing of a rigid rotor can be achieved by appropriately placing balancing masses in