FUELS AND COMBUSTION QUIZ

Fusion point of coal ash increases with increase in its __________ content.

Iron silicate

All of these

Lime and magnesia

Iron sulphate

TRUE ANSWER : ?
YOUR ANSWER : ?

Gas yield in the Kopper-Totzek coal gasifier is about __________ Nm³/ton coal (ash = 35%).

3500

1500

5000

150

TRUE ANSWER : ?
YOUR ANSWER : ?

__________ has the widest inflammability limit (explosion limit) of all the gases.

Acetylene

Hydrogen

Carbon monoxide

Methane

TRUE ANSWER : ?
YOUR ANSWER : ?

Which is the heaviest fuel gas out of the following?

Water gas

Coke oven gas

Carburetted water gas

Blast furnace gas

TRUE ANSWER : ?
YOUR ANSWER : ?

Increase in ash content of blast furnace coke

Reduces its consumption in the furnace

Does not affect its consumption in the furnace

Decreases its hardness and abrasion resistance

Increases its consumption in the furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is a single stage, fixed bed high pressure coal gasification process?

Winkler process

None of these

Kopper-Totzek process

Lurgi Process

TRUE ANSWER : ?
YOUR ANSWER : ?

Natural draft created by the chimney depends upon

Its height

Both A & B

Neither A nor B

Temperature of the flue gas

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following combustibles is absent in blast furnace gas?

CO

H₂

CH₄

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Fussain

Has highest fixed carbon and lowest volatile matter content of all the four banded components of coal

Is non-coking, but when blended with highly coking coal, controls its swelling and produces high strength coke on carbonisation

All of these

Is friable, charcoal like substance

TRUE ANSWER : ?
YOUR ANSWER : ?

Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixture. It means that the blast furnace gas will explode when burnt in a confined space, if its concentration in the gas-air mixture is __________ percent.

None of these

>71%

In between 37 & 71%

< 37%

TRUE ANSWER : ?
YOUR ANSWER : ?