FUELS AND COMBUSTION QUIZ

Low temperature oxidation of coal resulting from bad storage conditions does not decrease its

Oxygen content

Calorific value

Caking power

Hydrogen content

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Volatile matter

Ash content

Colour

Moisture content

TRUE ANSWER : ?
YOUR ANSWER : ?

Naphthalene is removed from coke oven gas by

Adsorbing on bog iron bed

Scrubbing with wash oil (a petroleum product)

None of these

Absorbing in vetro-coke solution

TRUE ANSWER : ?
YOUR ANSWER : ?

The maximum adiabatic flame temperature in air is __________ the maximum flame temperature in pure oxygen.

Higher than

Lower than

Same as

Not related to

TRUE ANSWER : ?
YOUR ANSWER : ?

__________ prohibits the use of alcohols directly in petrol engines.

Low octane number

Low calorific value

Low flash point

High cost & availability

TRUE ANSWER : ?
YOUR ANSWER : ?

Method of maintaining fires in furnace during standby periods without undue consumption of fuel is called

None of these

Back draughting

Banking

Under pressurising

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following will generate maximum volume of product of complete combustion (Nm³/Nm³ of fuel) ?

Blast furnace gas

Producers

Carburetted water gas

Natural gas

TRUE ANSWER : ?
YOUR ANSWER : ?

The calorific value of natural gas is about __________ kcal/Nm³.

35, 000

25, 000

2500

10, 000

TRUE ANSWER : ?
YOUR ANSWER : ?

Anthracite can be used for

All of these

Making carbon electrodes

Recarbonising steel

Blending with highly coking coal to check its swelling which helps in saving coke even walls from damage and to produce high strength coke

TRUE ANSWER : ?
YOUR ANSWER : ?

Adiabatic flame temperature of a fuel is dependent on the initial temperature of

Fuel

Neither A nor B

Air

Both A & B

TRUE ANSWER : ?
YOUR ANSWER : ?