Chemical Engineering Basics

Question: Heat required to raise the temperature of a body by 1 °C is called its
[A].

heat capacity.

[B].

specific heat capacity.

[C].

thermal conductivity.

[D].

water equivalent.

Answer: Option A

Explanation:

No answer description available for this question.

Question: A solid aluminium ball, when quenched in a water bath maintained at 40°C, cools down from 550°C to 450°C in 20 seconds. The expected temperature of the ball after next 20 seconds may be about __________ °C.
[A].

370

[B].

340

[C].

320

[D].

300

Answer: Option A

Explanation:

No answer description available for this question.

Question: Paint spray gun works on the principle of
[A].

Bernoulli’s theorem.

[B].

Boyle’s law.

[C].

Newton’s law of viscosity.

[D].

none of these.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Increase in temperature, in general results in the
[A].

decrease in the viscosities of both liquids & gases.

[B].

increase in the viscosities of both liquids & gases.

[C].

increase in the viscosity of liquids and decrease in that of gases.

[D].

decrease in the viscosity of liquids and increase in that of gases.

Answer: Option D

Explanation:

No answer description available for this question.

Question: Force between the molecules of the same substance is called __________ force.
[A].

adhesive

[B].

cohesive

[C].

molecular

[D].

Vander Walls

Answer: Option B

Explanation:

No answer description available for this question.

Question: Light year is the unit of
[A].

distance

[B].

time

[C].

intensity of light

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: For infinite parallel planes having emis-sivities ε1 & ε2, the interchange factor for radiation from surface 1 to surface 2 is given by
[A].

(ε1 + ε2)/ε1.ε2

[B].

ε1.ε2/(ε1 + ε2 – ε1.ε2)

[C].

ε1.ε2

[D].

ε1 + ε2

Answer: Option B

Explanation:

No answer description available for this question.

Question: Enzymes belong to the category of
[A].

proteins

[B].

carbohydrates

[C].

vitamins

[D].

fats

Answer: Option A

Explanation:

No answer description available for this question.

Question: Oxyacetylene reducing flame is used while carrying out welding on
[A].

alloy steel

[B].

grey cast iron

[C].

mild steel

[D].

high carbon steel

Answer: Option C

Explanation:

No answer description available for this question.

Question: Magnesium is present in
[A].

haemoglobin

[B].

chlorophyll

[C].

hypo solution

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.