FUELS AND COMBUSTION QUIZ

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

Tar yield is more

Gas yield is less

Aromatic content of tar produced is more

Ignition temperature of coke produced is less

TRUE ANSWER : ?
YOUR ANSWER : ?

Function of secondary air in pulverised coal firing is to

Ensure efficient burning of coal around the burner

Reduce primary air requirement

Transport the coal to the burner

Dry the coal

TRUE ANSWER : ?
YOUR ANSWER : ?

The shift conversion reaction taking place during water gas manufacture is given by

C + 2H₂O ⟷ CO₂ + 2H₂

C + H₂O ⟷ CO + H₂

CO + H₂O ⟷ CO₂ + H₂

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

A coal having higher volatile matter content, has lower

Smoking tendency on burning

Chance of catching fire during storage in open space

Ignition temperature

Coke oven gas yield on carbonisation

TRUE ANSWER : ?
YOUR ANSWER : ?

Pensky-Marten apparatus is used for those oils, whose flash points are __________ °F.

>120

90-110

TRUE ANSWER : ?
YOUR ANSWER : ?

Turndown ratio of a gas burner is equal to the

Both A & B

Minimum to maximum heat input ratio

Maximum to minimum heat input ratio

Maximum to minimum permissible gas flow rate

TRUE ANSWER : ?
YOUR ANSWER : ?

Use of preheated air for combustion of fuel in the furnace, increases the

Scale losses of the furnace stock

Flame temperature

Calorific value of the fuel

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

About __________ Nm³ of air will be required for the complete combustion of 2Nm³ of CO.

2

1

5

3

TRUE ANSWER : ?
YOUR ANSWER : ?

High pressure coal gasification is employed in __________ process.

Lurgi

Kopper-Totzek

Winkler

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Pure carbon is completely burnt in oxygen. The flue gas analysis is 70%CO₂, 20%CO and 10%O₂. The percent excess oxygen used is

12.5

0

10

20

TRUE ANSWER : ?
YOUR ANSWER : ?

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