FUELS AND COMBUSTION QUIZ

Out of the following fuels, the difference between gross and net calorific value will be minimum in case of

Coke oven gas

Water gas

Blast furnace gas

Natural gas

TRUE ANSWER : ?
YOUR ANSWER : ?

Yield of blast furnace gas is about __________ Nm³ /ton of pig iron.

2000

300

10000

5000

TRUE ANSWER : ?
YOUR ANSWER : ?

Number of macrocomponents present in coal according to Stopes are

Two

Four

Six

Five

TRUE ANSWER : ?
YOUR ANSWER : ?

If CO₂ is not fully absorbed by the KOH solution meant for its absorption in the orsat apparatus, it will appear as

CO

O₂

SO₂

N₂

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is unsuitable fuel for producer gas manufacture?

Anthracite

Coal having low fusion point of its ash

Coke

Coal having high fusion point of its ash

TRUE ANSWER : ?
YOUR ANSWER : ?

Heat penetration rate in narrow coke ovens in high temperature carbonisation of coal is around __________ cm/hr.

10

20

0.5

2.5

TRUE ANSWER : ?
YOUR ANSWER : ?

In Orsat's apparatus, ammoniacal cuprous chloride is used for selectivity absorbing

O₂

CO

H₂O

CO₂

TRUE ANSWER : ?
YOUR ANSWER : ?

Stack heat losses can be minimised by

Oxygen enrichment of combustion air

Maintaining proper draft in the furnace

Controlling the excess air

Using low c.v. fuels

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is coking?

Fussain

Vitrain

Neither A nor B

Both A & B

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following gaseous fuels has the highest net calorific value (kcal/Nm³)?

Natural gas

Producer gas

Liquified petroleum gas

Carburetted water gas

TRUE ANSWER : ?
YOUR ANSWER : ?

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