MGVCL EXAM PAPER (30-07-2021 SHIFT 3) QUIZ

Which of the following is not applicable to fluidised bed combustion of coal?

It can not burn low grade coal

It achieves higher fuel combustion efficiency

Less heat transfer surface area is required in boilers

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Natural gas

Coal bed methane (CBM)

Liquefied petroleum gas (LPG)

Sewage gas

TRUE ANSWER : ?
YOUR ANSWER : ?

A coal that softens and fuses on heating is

Carbonised

Caking

Non-caking

Classified

TRUE ANSWER : ?
YOUR ANSWER : ?

High sulphur content in a fuel __________ of the flue gases.

Both B & C

Increases the dew point

Reduces the combustion efficiency by limiting the permissible temperature reduction

Decreases the dew point

TRUE ANSWER : ?
YOUR ANSWER : ?

Main constituent of natural gas is

CH₄ (upto 90%)

H₂

C₃H₈

C₂H₆

TRUE ANSWER : ?
YOUR ANSWER : ?

High pressure coal gasification is employed in __________ process.

Kopper-Totzek

Lurgi

None of these

Winkler

TRUE ANSWER : ?
YOUR ANSWER : ?

With increase in the oxygen content of the coal, its __________ decreases.

Both A & B

Calorific value

Caking power

Neither A nor B

TRUE ANSWER : ?
YOUR ANSWER : ?

The average molecular weight of a flue gas having the composition by volume as CO₂ = 25%, O₂ = 25%, N₂ = 50% will be

23

42.9

47.3

27.6

TRUE ANSWER : ?
YOUR ANSWER : ?

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

2000

5000

300

10000

TRUE ANSWER : ?
YOUR ANSWER : ?

Removal of hydrogen from coke oven gas

Is not possible on commerical scale

Does not alter its calorific value

Decreases its calorific value

Increases its calorific value

TRUE ANSWER : ?
YOUR ANSWER : ?