FUELS AND COMBUSTION QUIZ

Purity of coke means that, it is high in carbon and low in

Ash

Moisture

Volatiles

Iron

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is a rich fuel gas?

Coal gas from underground gasification of coal

None of these

Producer gas

Refinery gases

TRUE ANSWER : ?
YOUR ANSWER : ?

The cooling medium used in dry quenching of coke is

Air

Carbon dioxide

Phenolic water

Nitrogen

TRUE ANSWER : ?
YOUR ANSWER : ?

The advantage of firing pulverised coal in the furnace lies in the fact, that it

Permits the use of low fusion point ash coal

Permits the use of high ash content coal

All of these

Accelerates the burning rate and economises on fuel combustion

TRUE ANSWER : ?
YOUR ANSWER : ?

Low temperature carbonisation

Is mainly for producing the smokeless domestic coke

Produces less quantity of tar than high temperature carbonisation

Is meant for the production of 'metallurgical coke'

Produces higher quantity of gas than high temperature carbonisation

TRUE ANSWER : ?
YOUR ANSWER : ?

The calorific value of L.D. converter gas is about __________ Kcal/Nm³ .

800

4500

1800

10000

TRUE ANSWER : ?
YOUR ANSWER : ?

A good coking coal should have high __________ content.

None of these

Ash

Moisture

Sulphur & phosphorus

TRUE ANSWER : ?
YOUR ANSWER : ?

Low temperature oxidation of coal during storage does not decrease its

Caking power

Oxygen content

None of these

Calorific value

TRUE ANSWER : ?
YOUR ANSWER : ?

Natural draught produced by a chimney depends upon the

Height of the chimney

Neither A nor B

Both A & B

Density of the chimney gases

TRUE ANSWER : ?
YOUR ANSWER : ?

Presence of nitrogen in combustion air does not reduce the

Any of the above

Flue gas temperature

Flame temperature

Amount of heat liberated

TRUE ANSWER : ?
YOUR ANSWER : ?