CHEMICAL ENGINEERING

Question: Auto collimator is used to check
[A].

flatness

[B].

angle

[C].

rotor balancing

[D].

roughness

Answer: Option B

Explanation:

No answer description available for this question.

Question: Heat dissipation in cooling towers is mainly by
[A].

conduction

[B].

convection

[C].

evaporation

[D].

radiation

Answer: Option C

Explanation:

No answer description available for this question.

Question: Calorific value of __________ are almost same.
[A].

lignite & anthracite coal

[B].

lignite & coal gas

[C].

petrol & diesel

[D].

coal gas & natural gas

Answer: Option C

Explanation:

No answer description available for this question.

Question: Air standard Otto cycle is more efficient than the diesel cycle for the same
[A].

heat addition & compression ratio.

[B].

heat addition & pressure.

[C].

compression ratio & pressure.

[D].

cylinder dimension & rpm.

Answer: Option A

Explanation:

No answer description available for this question.

Question: __________ the exhaust gas is an indication of the incomplete combustion of fuel.
[A].

Low temperature of

[B].

High temperature of

[C].

High % of CO in

[D].

High % of CO2 in

Answer: Option C

Explanation:

No answer description available for this question.

Question: A static fluid can not have
[A].

zero shear stress.

[B].

positive normal stress.

[C].

non-zero shear stress.

[D].

none of these.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Knocking tendency in a petrol engine decreases with increasing
[A].

supercharging

[B].

compression ratio

[C].

wall temperature

[D].

engine speed

Answer: Option D

Explanation:

No answer description available for this question.

Question: Alcohols are not suitable as diesel engine fuel because the cetane number of alcohols is
[A].

very low which prevents their ignition by compression.

[B].

very high which prevents their ignition by compression

[C].

zero.

[D].

none of these.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Boiler rating is normally done in terms of
[A].

steam temperature & pressure.

[B].

steam output (tons/hr).

[C].

heat transfer rate (kcal/hr).

[D].

heat transfer area (m2).

Answer: Option B

Explanation:

No answer description available for this question.

Question: Co-efficient of performance of a Carnot cycle refrigerator operating between – 23°C and + 27°C is
[A].

3

[B].

5

[C].

0.5

[D].

1.5

Answer: Option B

Explanation:

No answer description available for this question.