CHEMICAL ENGINEERING

Question: Alloys having more than 80% copper are generally more
[A].

abrasion resistant.

[B].

corrosion resistant.

[C].

prone to season cracking.

[D].

machinable.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Material having maximum density is
[A].

plutonium

[B].

osmium

[C].

titanium

[D].

uranium

Answer: Option B

Explanation:

No answer description available for this question.

Question: Fibre reinforced plastic (FRP) are
[A].

made of glass fibre and thermoplastic resins.

[B].

anisotropic.

[C].

made of thermosetting resin and glass fibre.

[D].

both ‘b’ & ‘c’

Answer: Option D

Explanation:

No answer description available for this question.

Question: Cast iron contains __________ percent carbon.
[A].

2.5

[B].

3.75

[C].

4.75

[D].

5.25

Answer: Option A

Explanation:

No answer description available for this question.

Question: The amount of water evaporated in kg per kg of fuel burnt in a boiler is called the __________ of a boiler.
[A].

evaporative capacity

[B].

evaporation efficiency

[C].

thermal efficiency

[D].

steam load

Answer: Option A

Explanation:

No answer description available for this question.

Question: Draught produced by a tall chimney due to density difference between hot flue gas inside the Chimney and atmospheric air outside the chimney is more appropriately known as the __________ draught.
[A].

natural

[B].

induced

[C].

forced

[D].

chimney

Answer: Option A

Explanation:

No answer description available for this question.

Question: Heat transfer to the water wall in a high pressure water wall type boiler furnace is mainly by
[A].

conduction

[B].

convection

[C].

both ‘a’ & ‘b’

[D].

radiation

Answer: Option D

Explanation:

No answer description available for this question.

Question: Which of the following relatively employs the highest heat transfer surface area in a high pressure boiler ?
[A].

Airpreheater

[B].

Economiser

[C].

Steam superheater

[D].

Furnace water wall

Answer: Option A

Explanation:

No answer description available for this question.

Question: A balanced draught boiler furnace employs __________ draught fan.
[A].

induced

[B].

forced

[C].

both ‘a’ & ‘b’

[D].

neither ‘a’ nor ‘b’

Answer: Option C

Explanation:

No answer description available for this question.

Question: Function of blow down valve in a boiler is to
[A].

maintain the drum level.

[B].

keep the drum pressure constant.

[C].

drain out the sludge from the drum.

[D].

empty the boiler during shutdown.

Answer: Option C

Explanation:

No answer description available for this question.