FUELS AND COMBUSTION QUIZ

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 : ?

Mineral matter, 'M' and ash percentage 'A' in coal are roughly related as

M = 1.8 A

M = 0.5 A

M = A

M = 1.1 A

TRUE ANSWER : ?
YOUR ANSWER : ?

Degree of carbonisation of coal during coke making can be roughly judged by the __________ of the coke produced.

Moisture content

Ash content

Volatile matter

Colour

TRUE ANSWER : ?
YOUR ANSWER : ?

Bituminous coal

Burns with smoky yellow flame

Ignites less easily than anthracite

Is generally coking

Both B and C

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is a rich fuel gas?

None of these

Coal gas from underground gasification of coal

Refinery gases

Producer gas

TRUE ANSWER : ?
YOUR ANSWER : ?

'Fat coals' are those coals which have very high

Caking capacity

Inherent moisture content

Volatile matter content

Fusion point of its ash

TRUE ANSWER : ?
YOUR ANSWER : ?

Calorific value as determined by bomb calorimeter is the

Net calorific value at constant volume

Lower calorific value at constant pressure

Gross calorific value at constant pressure

Higher calorific value at constant volume

TRUE ANSWER : ?
YOUR ANSWER : ?

The calorific value is the highest out of the following for

Water gas

Producer gas

Coke oven gas

Blast furnace gas

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is called "blue gas"?

Producer gas

Natural gas

Water gas

Coke oven gas

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Calorific value of the fuel

Flame temperature

Scale losses of the furnace stock

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

↑