FUELS AND COMBUSTION QUIZ

Combustion reaction of fuels is a/an __________ reaction.

Auto catalytic

None of these

Exothermic

Endothermic

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is not a by-product fuel?

Refinery gas

Petrol

Blast furnace gas

Pitch

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following constituents of coal is the most important in the production of coke?

Carbon

Moisture

Volatiles

Ash

TRUE ANSWER : ?
YOUR ANSWER : ?

With increase in calorific value of fuels, their adiabatic flame temperatures

Remain unchanged

Decrease

Increase

May increase or decrease ; depends on the quantity of products of combustion

TRUE ANSWER : ?
YOUR ANSWER : ?

Main constituent of the gas produced from a gobar gas plant is

CH₄

CO

H₂

CO₂

TRUE ANSWER : ?
YOUR ANSWER : ?

Power alcohol as compared to straight run gasoline has lower

Viscosity

Octane number

Specific gravity

Calorific value

TRUE ANSWER : ?
YOUR ANSWER : ?

Critical Air Blast (CAB) value of coke is a direct measure of its

Reactivity

Strength

None of these

Hardness

TRUE ANSWER : ?
YOUR ANSWER : ?

Producer gas containing least amount of tar is produced by the

Atmospheric pressure gasification of coal (e.g., in Kopper-Totzek gasifier)

Partial combustion of large size (< 50 mm) coke

High pressure gasification of coal (e.g. in Lurgi gasifier)

Partial combustion of coal

TRUE ANSWER : ?
YOUR ANSWER : ?

Actual flame temperature is always lower than the adiabatic flame temperature, because there is

Both A & B

Neither A nor B

Always loss of heat from the flame

No possibility of obtaining complete combustion at high temperature

TRUE ANSWER : ?
YOUR ANSWER : ?

The cuprous chloride used in orsat apparatus can absorb

All of these

Both CO and O₂

Both CO and CO₂

Only CO

TRUE ANSWER : ?
YOUR ANSWER : ?