FUELS AND COMBUSTION QUIZ

The sequence of absorption in flue gas analysis by Orsat's apparatus is respectively

CO₂, CO, O₂

CO₂, O₂, CO

CO, O₂, CO₂

O₂, CO₂, CO

TRUE ANSWER : ?
YOUR ANSWER : ?

Very __________ coals are completely devoid of cokability i.e, it is non coking.

Both A & B

Neither A nor B

Mature

Young

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Convert CO to CO₂

Minimise the chances of clinker formation

Increase the combustion rate

Increase the gas production rate

TRUE ANSWER : ?
YOUR ANSWER : ?

A sooty flame can be made non-luminous by

Admitting more air

Shutting gas supply

Admitting more gas

Shutting air supply

TRUE ANSWER : ?
YOUR ANSWER : ?

The difference between total carbon and fixed carbon of coal will be minimum in case of

Lignite

Anthracite

High temperature coke (V.M < 0.5%)

Bituminous coal

TRUE ANSWER : ?
YOUR ANSWER : ?

Coke oven gas is stripped of its H₂S and mercaptans content by

Bubbling it through dilute sulphuric acid

Adsorption on bog iron bed

Adsorption on silica gel

Absorption in wash oil

TRUE ANSWER : ?
YOUR ANSWER : ?

If CO₂ is not fully absorbed by the KOH solution meant for its absorption in the orsat apparatus, it will appear as

O₂

CO

SO₂

N₂

TRUE ANSWER : ?
YOUR ANSWER : ?

In low temperature carbonisation of coal, the

Yield of coke oven gas is 290 Nm³ /ton dry coal

Temperature maintained is 700°C

Yield of tar is about 3% of dry coal

Volatile matter in coke is zero

TRUE ANSWER : ?
YOUR ANSWER : ?

Caking coal is desirable for

Coke making

All of these

Burning on firebars

Burning on travelling grate

TRUE ANSWER : ?
YOUR ANSWER : ?

In high temperature carbonisation (as compared to low temperature carbonisation) of coal, the

Ignition temperature of coke produced is less

Tar yield is more

Aromatic content of tar produced is more

Gas yield is less

TRUE ANSWER : ?
YOUR ANSWER : ?

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