FUELS AND COMBUSTION QUIZ

A good quality coal should have

High sulphur

High ash content

Low fusion point of ash

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Critical Air Blast (CAB) value of coke is a direct measure of its

Strength

Hardness

None of these

Reactivity

TRUE ANSWER : ?
YOUR ANSWER : ?

High ash containing coke

None of these

Is desirable in producer gas manufacture

Has poor strength and abrasion resistance

Produces more slag when used in the blast furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

Coking coals are invariably

Lignites

Bituminous coals

Semi-anthracites

Anthracites

TRUE ANSWER : ?
YOUR ANSWER : ?

Octane number of 2, 2, 4 - trimethyl pen-tane is

More than 100

100

In between 0 and 100

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is unsuitable fuel for producer gas manufacture?

Coke

Anthracite

Coal having low fusion point of its ash

Coal having high fusion point of its ash

TRUE ANSWER : ?
YOUR ANSWER : ?

Washing of coal is done to reduce the

Mineral matter

Inherent impurities

Adhering impurities

Both B and C

TRUE ANSWER : ?
YOUR ANSWER : ?

In flue gas analysis by Orsat's apparatus, oxygen is absorbed by

Cuprous chloride

None of these

Potassium hydroxide

Alkaline pyragllol solution

TRUE ANSWER : ?
YOUR ANSWER : ?

C/H ratio is the maximum in case of

Coal

Natural gas

Furnace oil

Naphtha

TRUE ANSWER : ?
YOUR ANSWER : ?

Blast furnace gas burns with a bluish flame, because of the presence of

S

CH₄

CO₂

CO

TRUE ANSWER : ?
YOUR ANSWER : ?

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