Chemical Engineering Basics

Question: Fire on fuel oil lines can be extinguished by
[A].

foam

[B].

steam

[C].

water

[D].

carbon dioxide

Answer: Option A

Explanation:

No answer description available for this question.

Question: Large scale fire on fuel gas line is normally extinguished by
[A].

water

[B].

steam

[C].

foam

[D].

nitrogen

Answer: Option D

Explanation:

No answer description available for this question.

Question: ‘Flare tower’ used in industry is meant for
[A].

venting off (after burning) the excess inflammable/toxic gases at high pressure.

[B].

absorbing the pollutant gases from the furnace exhaust.

[C].

cooling of furnace exhaust gases.

[D].

none of these.

Answer: Option A

Explanation:

No answer description available for this question.

Question: ‘Sterilised zone’ around a hazardous chemical industry is an area with __________ km radius around it, in which the total population/inhabitants should be less than 20000 preferably in the upwind direction.
[A].

0.5

[B].

5

[C].

25

[D].

50

Answer: Option B

Explanation:

No answer description available for this question.

Question: Hardness & tensile strength of austenitic stainless steel can be increased by
[A].

martempering

[B].

cold working

[C].

normalising

[D].

hardening

Answer: Option B

Explanation:

No answer description available for this question.

Question: A psychrometer does not measure the __________ temperature of moist air.
[A].

dew point

[B].

dry bulb

[C].

wet bulb

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: At 100% relative humidity, the dew point temperature of moist air is
[A].

less than the wet bulb temperature.

[B].

more than the wet bulb temperature.

[C].

equal to the wet bulb temperature.

[D].

equal to the ambient temperature.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Lead pencil contains
[A].

graphite

[B].

lead sulphide

[C].

lead

[D].

both(b) & (c)

Answer: Option A

Explanation:

No answer description available for this question.

Question: Liquor poisoning generally occurs due to the presence of __________ in it.
[A].

ethyl alcohol

[B].

impurities

[C].

methyl alcohol

[D].

carbonic acid

Answer: Option C

Explanation:

No answer description available for this question.

Question: Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following is not used as a frother?
[A].

Cresylic acid

[B].

Xanthaies

[C].

Pine oil

[D].

all ‘a’ ‘b’ & ‘c’

Answer: Option B

Explanation:

No answer description available for this question.