August 2022

Question: Inertial forces are obtained, when the elastic forces are multiplied by __________ number.
[A].

Mach

[B].

Froude

[C].

Reynolds

[D].

Euler

Answer: Option A

Explanation:

No answer description available for this question.

Question: Induced draft fans provided in large thermal power plant boilers have __________ blades.
[A].

forward curved

[B].

backward curved

[C].

double curved

[D].

radial or straight

Answer: Option B

Explanation:

No answer description available for this question.

Question: Air refrigeration cycle is used in the air crafts, because of
[A].

low temperature encountered at high altitude.

[B].

its high heat transfer rate.

[C].

its low unit weight per ton of refrigeration.

[D].

its higher co-efficient of performance (COP).

Answer: Option C

Explanation:

No answer description available for this question.

Question: During sensible heating of humid air
[A].

relative humidity increases.

[B].

dew point remains constant.

[C].

dry bulb & wet bulb temperature increases.

[D].

both ‘b’ & ‘c’.

Answer: Option D

Explanation:

No answer description available for this question.

Question: The boiling & freezing points on a newly defined temperature scale in degree ‘D’ are 400°D & 100°D respectively. The temperature reading corresponding to 60°C on this new temperature scale will be equal to __________ °D.
[A].

140

[B].

180

[C].

240

[D].

280

Answer: Option D

Explanation:

No answer description available for this question.

Question: Which of the following pair is correctly matched?
[A].

Heat transfer: Thermal diffusivity.

[B].

Mass transfer: Diffusion co-efficient.

[C].

Momentum transfer: Kinematic viscosity.

[D].

all ‘a’, ‘b’ & ‘c’ are correctly matched.

Answer: Option D

Explanation:

No answer description available for this question.

Question: For a small scale toy factory, the fixed cost per month is Rs. 5000/-. The variable cost per toy is Rs. 20 and sales price is Rs. 30 per toy. The break even production per month will be __________ toys.
[A].

250

[B].

500

[C].

1000

[D].

3000

Answer: Option B

Explanation:

No answer description available for this question.

Question: Frost formation on the evaporator tubes in the domestic refrigerators
[A].

can be prevented by proper design.

[B].

decreased compressor power.

[C].

causes heat loss due to poor heat transfer.

[D].

is immaterial.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Out of the following the refractive index is the highest for
[A].

glass

[B].

diamond

[C].

brine

[D].

kerosene

Answer: Option B

Explanation:

No answer description available for this question.

Question: Catalyst used in the catalytic converter employed in automobiles to convert CO into CO and for complete oxidation of un-burnt hydrocarbons is
[A].

nickel

[B].

cobalt

[C].

vanadium

[D].

platinum

Answer: Option D

Explanation:

No answer description available for this question.