FUELS AND COMBUSTION QUIZ

Low temperature oxidation of coal during storage does not decrease its

Calorific value

None of these

Caking power

Oxygen content

TRUE ANSWER : ?
YOUR ANSWER : ?

Coke made in narrower by-product coke ovens (as compared to wider ovens) is

Smaller in size

Stronger

Less reactive

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Producer gas containing least amount of tar is produced by the

High pressure gasification of coal (e.g. in Lurgi gasifier)

Partial combustion of coal

Atmospheric pressure gasification of coal (e.g., in Kopper-Totzek gasifier)

Partial combustion of large size (< 50 mm) coke

TRUE ANSWER : ?
YOUR ANSWER : ?

L.D. converter gas (produced in steel plant) comprises mainly of

CO & O₂

CO₂ & O₂

CO (upto 65%) & CO₂

CO₂ & H₂

TRUE ANSWER : ?
YOUR ANSWER : ?

Assam coals suffers mainly from the disadvantage of high __________ content.

Moisture

Volatile matter

Ash

Sulphur (4-6%)

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Coal having high fusion point of its ash

Anthracite

Coke

Coal having low fusion point of its ash

TRUE ANSWER : ?
YOUR ANSWER : ?

Which is the most matured coal?

Semi-anthracite

Anthracite

Bituminous

Lignite

TRUE ANSWER : ?
YOUR ANSWER : ?

The gas which contributes maximum to the heating value of natural gas is

H₂

CH₄

CO

CO₂

TRUE ANSWER : ?
YOUR ANSWER : ?

Calorific value of wood gas is about __________ kcal/Nm³.

8500

1500

3300

5400

TRUE ANSWER : ?
YOUR ANSWER : ?

A travelling grate stoker is meant for the efficient burning of __________ coal.

High ash

Caking

Non-caking

Pulverised

TRUE ANSWER : ?
YOUR ANSWER : ?

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