CHEMICAL ENGINEERING

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.

Question: For a fixed cross-sectional area, the most economical channel section has maximum
[A].

wetted perimeter.

[B].

fluid discharge rate.

[C].

fluid velocity.

[D].

depth of flowing fluid.

Answer: Option B

Explanation:

No answer description available for this question.

Question: An example of a buffer solution is
[A].

mercury

[B].

lime water

[C].

human blood

[D].

concentrated nitric acid

Answer: Option C

Explanation:

No answer description available for this question.

Question: A metalloid possesses the characteristics of both the metals and non-metals. Which of the following is not a metalloid ?
[A].

Arsenic

[B].

Antimony

[C].

Lead

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: Density in the solid state is slightly less than that in its liquid state, in case of
[A].

carbon dioxide

[B].

water

[C].

mercury

[D].

none of these.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Addition of small amount of __________ to grey cast iron is done to produce nodular grey cast iron.
[A].

manganese

[B].

phosphorous

[C].

magnesium

[D].

chromium

Answer: Option C

Explanation:

No answer description available for this question.

Question: Increasing sulphur content in pig iron tends to make it
[A].

soft

[B].

hard

[C].

tough

[D].

ductile & malleable

Answer: Option B

Explanation:

No answer description available for this question.