FUELS AND COMBUSTION QUIZ

KOH solution used in orsat apparatus absorbs

SO₂

Both A & B

CO₂

Neither A nor B

TRUE ANSWER : ?
YOUR ANSWER : ?

A coal gasifier opearating at 20 atm. (e.g. Lugri gasifier) as compared to one operating at atmospheric pressure (e.g. Kopper-Totzek or Winkler gasifier) will produce a gas having

Lower carbon dioxide content

Higher methane content and thus higher calorific value

Higher carbon monoxide content

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Fuel consumption in coke making can be reduced by

Stamped charging of coal

All of these

Dry quenching of coke

Preheating, blending and de-ashing the coal

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is a primary fuel?

Blast furnace coke

Wood charcoal

Gasoline

Natural gas

TRUE ANSWER : ?
YOUR ANSWER : ?

Flue gas discharge velocity through chimney of a big thermal power plant may be around __________ m/sec.

0.5

50

10

500

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Absorption in wash oil

Adsorption on silica gel

Bubbling it through dilute sulphuric acid

Adsorption on bog iron bed

TRUE ANSWER : ?
YOUR ANSWER : ?

Calorific value of coke oven gas is around __________ Kcal/Nm³.

2000

7500

900

4200

TRUE ANSWER : ?
YOUR ANSWER : ?

Orsat apparatus

Can

Gives flue gas analysis on dry basis

All of these

Determines N₂ in flue gas indirectly

TRUE ANSWER : ?
YOUR ANSWER : ?

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

CO₂

H₂

CH₄

CO

TRUE ANSWER : ?
YOUR ANSWER : ?

Ionisation potential applied across the electrodes of electrostatic tar precipitator is around

230 V DC

60 KV DC

230 V AC

60 KV AC

TRUE ANSWER : ?
YOUR ANSWER : ?

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