Chemical Engineering Basics

Question: __________ pipe is the most suitable for carrying sanitary drainage.
[A].

stainless steel

[B].

Reinforced cement concrete

[C].

Cast iron

[D].

Asbestos cement

Answer: Option C

Explanation:

No answer description available for this question.

Question: Normal dosage of chlorine in public water supply scheme ranges from __________ ppm.
[A].

0.5 to 1

[B].

10 to 15

[C].

300 to 500

[D].

1000 to 1500

Answer: Option A

Explanation:

No answer description available for this question.

Question: A common disinfectant used in village wells for disinfection of water is
[A].

free chlorine

[B].

bromine

[C].

iodine

[D].

potassium permanganate

Answer: Option D

Explanation:

No answer description available for this question.

Question: If a heat transfer surface is pock-marked with a number of cavities, then as compared to a smooth surface the heat transfer by __________ will not increase.
[A].

convection

[B].

nucleate boiling

[C].

radiation

[D].

conduction

Answer: Option A

Explanation:

No answer description available for this question.

Question: “‘Dikes’ are low height walls made around the storage vessels meant for storing hazardous & inflammable material (e.g., petroleum products). Volume of dikes is equal to (where, V = volume of the storage vessel)
[A].

V

[B].

V/2

[C].

2V

[D].

3V

Answer: Option A

Explanation:

No answer description available for this question.

Question: Minimum safe distance between two liquid fuel storage tanks is equal to (where, H = height of the tank)
[A].

H

[B].

H/2

[C].

H/4

[D].

H/6

Answer: Option D

Explanation:

No answer description available for this question.

Question: As per international norms, the maximum permissible value of noise level in the industrial environment is __________ decibels as measured at a distance of 1.5 metres from the source of noise.
[A].

110

[B].

85

[C].

60

[D].

45

Answer: Option B

Explanation:

No answer description available for this question.

Question: A solar cell converts the sunlight directly into __________ energy.
[A].

thermal

[B].

electrical

[C].

mechanical

[D].

chemical

Answer: Option B

Explanation:

No answer description available for this question.

Question: If the head is doubled in & centrifugal pump, the power required will increase in the ratio of
[A].

23

[B].

23/2

[C].

25/2

[D].

21/3

Answer: Option B

Explanation:

No answer description available for this question.

Question: __________ is the process of coating the surface of steel with aluminium oxide, thereby imparting it increased resistance to corrosion & oxidation upto a temperature of 700°C.
[A].

Vaneering

[B].

Galvanising

[C].

Electroplating

[D].

Calorising

Answer: Option D

Explanation:

No answer description available for this question.