FUELS AND COMBUSTION QUIZ

Carbon Content by weight in air dried wood may be about __________ percent.

10

50

80

25

TRUE ANSWER : ?
YOUR ANSWER : ?

Main component of sewage gas produced during aneorobic decomposition of organic waste (by suitable bacteria) during sewage disposal is

N₂

CO₂

H₂

CH₄

TRUE ANSWER : ?
YOUR ANSWER : ?

Fuel consumption in coke making can be reduced by

Preheating, blending and de-ashing the coal

All of these

Stamped charging of coal

Dry quenching of coke

TRUE ANSWER : ?
YOUR ANSWER : ?

With increase in C/H ratio of a fuel, the dew point of flue gases

May increase or decrease ; depends on the type of fuel

Increases

Decreases

Remains same

TRUE ANSWER : ?
YOUR ANSWER : ?

Preheating of combustion air is done to

Reduce its requirement for effecting the complete combustion

Increase the adiabatic flame temperature

Complete the combustion of fuel

Increase the calorific value of the fuel

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is not endothermic?

Gasification

Reforming

Cracking

Partial oxidation

TRUE ANSWER : ?
YOUR ANSWER : ?

Anthracite can be used for

Recarbonising steel

Blending with highly coking coal to check its swelling which helps in saving coke even walls from damage and to produce high strength coke

Making carbon electrodes

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Gray-King Assay and Roga Index of coal is a measure of its

Caking and swelling properties

Abradability

Weathering properties

Grindability

TRUE ANSWER : ?
YOUR ANSWER : ?

Commercial production of petrol from coal (as practised in a factory at Sasol in South Africa) is done by the __________ of coal.

Carbonisation

None of these

Gasification

Hydrogenation

TRUE ANSWER : ?
YOUR ANSWER : ?

KOH solution used in orsat apparatus absorbs

SO₂

Both A & B

CO₂

Neither A nor B

TRUE ANSWER : ?
YOUR ANSWER : ?