Coke oven gas burns with an yellowish flame, because of the presence of

Blast furnace gas burns with a bluish flame, because of the presence of

A

CO

B

CH₄

C

CO₂

D

S

Coke oven gas is a better fuel than blast furnace gas, because of its higher

A

Calorific value, cleanliness and relatively low distribution cost (due to its low specific gravity)

B

Adiabatic flame temperature

C

Heat release rate (thus requiring smaller combustion chamber)

D

All of the above

Width of the coke oven towards coke side is slightly more than that on pusher side to

A

Facilitate easy discharging of coke as it swells during carbonisation

B

Facilitate uniform heating of the oven

C

Increase the output of the coke

D

None of these

Blast furnace gas compared to coke oven gas has

A

Lower ignition temperature

B

Narrower limit of inflammability

C

Higher calorific value

D

Lower theoretical flame temperature

Coke oven gas compared to blast furnace gas is

A

More explosive and inflammable

B

Less poisonous

C

Lighter

D

All of the above

Fuel gases containing hydrocarbons (ie.g. coke oven gas) are not preheated before burning, mainly because

A

The hydrocarbons crack thereby choking and fouling the heat transfer surface by carbon soot

B

It reduces its calorific value tremendously

C

It reduces its flame temperature tremendously

D

There are chances of explosion during preheating

Naphthalene is removed from coke oven gas by

A

Adsorbing on palladium

B

Absorbing in ethanolamine

C

Scrubbing with wash oil

D

Passing it through electrostatic precipitator

Hydrogen content of coke oven gas is __________ percent.

A

4

B

22

C

58

D

84

Flushing liquor used for cooling coke oven gas constitutes of

A

Ammoniacal liquor

B

K₂CO₃ solution

C

Dilute H₂SO₄

D

Dilute HCl

Coke oven gas produced by high temperature carbonisation of coal (as compared to that produced by low temperature carbonisation), has

A

Higher calorific value

B

Lower hydrogen content

C

Both A & B

D

Neither A nor B

Coke oven gas burns with an yellowish flame, because of the presence of

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