FUELS AND COMBUSTION QUIZ

In Lurgi coal gasifier,

Entrainment of solids is higher

Low carbon conversion efficiency is achieved

Coking coals cannot be used

Larger quantity of coal can be processed

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Decreases

Remains same

Increases

May increase or decrease ; depends on the type of fuel

TRUE ANSWER : ?
YOUR ANSWER : ?

Gobar gas is produced by the __________ of 'gobar' (cow dung).

Oxidation

Hydrolysis

Dehydration

Fermentation

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Kopper-Totzek process

Winkler process

None of these

Lurgi Process

TRUE ANSWER : ?
YOUR ANSWER : ?

Volumetric ratio of N₂ to O₂ in dry atmospheric air is

3.76

0.79

4.76

0.21

TRUE ANSWER : ?
YOUR ANSWER : ?

Pitch creosote mixture (PCM) as compared to furnace oil is a better fuel, because its

Emissivity factor is higher

Sulphur content is lower

All of these

Flue gas has lower dew point thereby facilitating more waste heat recovery

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is a poisonous fuel gas?

Blast furnace gas

Natural gas

None of these

Coke oven gas

TRUE ANSWER : ?
YOUR ANSWER : ?

Coke compared to the coal from which it has been made, contains

All of these

Less volatile matter

More carbon

Greater percentage of ash

TRUE ANSWER : ?
YOUR ANSWER : ?

Preheating of a gaseous fuel results in increased

Ignition temperature

Quantity of flue gas

Flame length

Flame temperature

TRUE ANSWER : ?
YOUR ANSWER : ?

Steam is intermittently admitted into the fuel bed during the production of producer gas to

Minimise the chances of clinker formation

Increase the combustion rate

Convert CO to CO₂

Increase the gas production rate

TRUE ANSWER : ?
YOUR ANSWER : ?

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