FUELS AND COMBUSTION QUIZ

Which of the following gaseous fuels is likely to have the highest gross calorific value?

Sewage gas

Natural gas

LPG

Producer gas

TRUE ANSWER : ?
YOUR ANSWER : ?

Traces of tar fog present in the coke oven gas is removed by

Electrostatic precipitator

Wet packed scrubber

Cyclone separator

Washing with monoethanolamine

TRUE ANSWER : ?
YOUR ANSWER : ?

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

300

2000

5000

10000

TRUE ANSWER : ?
YOUR ANSWER : ?

Percentage of hydrogen in coke oven gas may be around

60

25

10

45

TRUE ANSWER : ?
YOUR ANSWER : ?

Artificial draught produced by a fan can be controlled by the

Variation in the pitch of the fan blades

All of these

Speed of the fan

Damper

TRUE ANSWER : ?
YOUR ANSWER : ?

Prime coking coal is always blended with medium or non- coking coal before ear-bonisation

To check against its excessive swelling during heating, which may exert high pressure and damage coke oven walls

Neither A nor B

Because, it alone produces unreactive coke

Both A & B

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following fuel gases has the highest calorific value ?

Liquefied petroleum gas (LPG)

Natural gas

Coal bed methane (CBM)

Sewage gas

TRUE ANSWER : ?
YOUR ANSWER : ?

Coking time in a commercial high temperature coal carbonisation plant is about __________ hours.

18

6

28

36

TRUE ANSWER : ?
YOUR ANSWER : ?

Calorific value of bituminous coal may be around __________ Kcal/kg.

20000

6500

500

1500

TRUE ANSWER : ?
YOUR ANSWER : ?

Dry air required to burn 1 kg of carbon completely may be around __________ kg.

11

38

2

20

TRUE ANSWER : ?
YOUR ANSWER : ?

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