FUELS AND COMBUSTION QUIZ

Hard pitch is used for making

Plastics

Pulverised fuel

Insecticides

Perfumes

TRUE ANSWER : ?
YOUR ANSWER : ?

Coking coals are invariably

Anthracites

Bituminous coals

Semi-anthracites

Lignites

TRUE ANSWER : ?
YOUR ANSWER : ?

__________ present in coal is not determined in its ultimate analysis.

Hydrogen

Total carbon

Nitrogen

Fixed carbon

TRUE ANSWER : ?
YOUR ANSWER : ?

Fusion point of coal ash generally varies from 1000 to 1700° C. Ash having fusion point less than __________ °C is liable to form clinker.

1350

1400

1250

1100

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following can be made into briquettes without the use of a binder?

Bituminous coal

Lignite

None of these

Anthracite coal

TRUE ANSWER : ?
YOUR ANSWER : ?

Fuel combustion is never cent per cent efficient due to

All of these

Dry gas/stack gas loss

Incomplete combustion

Moisture loss

TRUE ANSWER : ?
YOUR ANSWER : ?

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

High ash

Caking

Pulverised

Non-caking

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is the most important deterrents to an extended use of pulverised coal in boiler firing?

Ash disposal problem

Erosion of induced draft fan blades

High power consumption in its transportation

Excessive fly-ash discharge from the stack

TRUE ANSWER : ?
YOUR ANSWER : ?

Water gas constitutes mainly of

CO & H₂

CO & N₂

CH₄ & H₂

CO₂ & H₂

TRUE ANSWER : ?
YOUR ANSWER : ?

Preheating of __________ the flame temperature.

Either the fuel or the air does not affect

Either the fuel or the air or both, increases

Combustion air decreases

The gaseous fuel before combustion decreases

TRUE ANSWER : ?
YOUR ANSWER : ?

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