FUELS AND COMBUSTION QUIZ

The sequence of absorption in flue gas analysis by Orsat's apparatus is respectively

CO, O₂, CO₂

CO₂, O₂, CO

CO₂, CO, O₂

O₂, CO₂, CO

TRUE ANSWER : ?
YOUR ANSWER : ?

Orsat apparatus is meant for

Gravimetric analysis of flue gas

None of these

Finding out combustion efficiency

Direct determination of nitrogen in flue gas by absorbing it in ammoniacal cuprous chloride

TRUE ANSWER : ?
YOUR ANSWER : ?

Of the total tar present in raw coke oven gas, the tar recovered in primary cooler is about __________ percent.

25

55

5

75

TRUE ANSWER : ?
YOUR ANSWER : ?

Washing of coal is done to reduce the

Both B and C

Adhering impurities

Mineral matter

Inherent impurities

TRUE ANSWER : ?
YOUR ANSWER : ?

Calorific value as determined by bomb calorimeter is the

Gross calorific value at constant pressure

Higher calorific value at constant volume

Net calorific value at constant volume

Lower calorific value at constant pressure

TRUE ANSWER : ?
YOUR ANSWER : ?

Largest constituent of blast furnace gas is

CO₂

CO

H₂

N₂

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is a lean fuel gas?

Coke oven gas

LPG

Natural gas

Blast furnace gas

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YOUR ANSWER : ?

Width of the coke oven towards coke side is slightly more than that on pusher side to

None of these

Increase the output of the coke

Facilitate easy discharging of coke as it swells during carbonisation

Facilitate uniform heating of the oven

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Increase

Remain unchanged

Decrease

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

TRUE ANSWER : ?
YOUR ANSWER : ?

Stack (chimney) height in a big thermal power plant is dictated by the

Limitation of constructional facilities

Draught to be created

Pollution control aspect

None of these

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YOUR ANSWER : ?