Fuels and Combustion

Question: Nitrogen present in the flue gas is determined in the orsat apparatus by absorbing it in
[A].

KOH

[B].

ammoniacal cuprous chloride

[C].

pyrogallol solution

[D].

none of these

Answer: Option D

Explanation:

No answer description available for this question.

Question: Air/gas ratio for complete combustion will be the highest for
[A].

LPG

[B].

gobar gas

[C].

coke oven gas

[D].

carburetted water gas

Answer: Option A

Explanation:

No answer description available for this question.

Question: Calorific value of both the solid & liquid fuels can be determined by using __________ calorimeter.
[A].

Junker’s

[B].

Bomb

[C].

Boy’s

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: __________ process is meant for direct hydrogenation of coal to produce liquid fuel.
[A].

Fischer-Tropsch

[B].

Bergius

[C].

Lurgi

[D].

None of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: Main use of soft coke is as __________ fuel.
[A].

domestic

[B].

blastfurnace

[C].

foundary

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: Advantages of fluidised bed combustion are
[A].

reduced NOx formation in flue gas.

[B].

lower furnace operating temperature.

[C].

high heat transfer rate.

[D].

all (a), (b) & (c).

Answer: Option D

Explanation:

No answer description available for this question.

Question: Orsat apparatus
[A].

gives flue gas analysis on dry basis.

[B].

determines N2 in flue gas indirectly.

[C].

can’t determine CO in flue gas, if it is < 0.2%.

[D].

all (a), (b) & (c).

Answer: Option D

Explanation:

No answer description available for this question.

Question: Bunsen burner is an example of a/an __________ burner.
[A].

inside mixing/premix type

[B].

outside mixing/diffusion flame/nozzle mix type.

[C].

rotary cup.

[D].

submerged combustion.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Combustion of pulverised coal compared to the lumpy coal
[A].

provides better control of furnace temperature.

[B].

facilitates combustion with lower excess air.

[C].

provides higher thermal efficiency & flame temperature.

[D].

all (a), (b) & (c).

Answer: Option D

Explanation:

No answer description available for this question.

Question: Deficiency of combustion air during combustion of a gaseous fuel
[A].

lengthens the flame.

[B].

causes heat loss of fuel by its partial combustion.

[C].

both (a) & (b).

[D].

shortens the flame.

Answer: Option C

Explanation:

No answer description available for this question.