FUELS AND COMBUSTION QUIZ

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

Both B & C

Reduces the combustion efficiency by limiting the permissible temperature reduction

Increases the dew point

Decreases the dew point

TRUE ANSWER : ?
YOUR ANSWER : ?

Coal is pulverised before burning in large capacity boiler furnaces mainly to

Provide trouble free operation

Enhance its calorific value

Facilitate easy ash removal

Ensure its complete combustion

TRUE ANSWER : ?
YOUR ANSWER : ?

Weathering of coal during storage causes

Increase in its friability

All of these

Decrease in its caking capacity

Reduction in coal size

TRUE ANSWER : ?
YOUR ANSWER : ?

As the equilibrium moisture content of the coal increases, its

Swelling number decreases

Calorific value increases

Bulk density decreases

Swelling number increases

TRUE ANSWER : ?
YOUR ANSWER : ?

Shatter index of metallurgical coke on 2 inches and 0.5 inch screen should be respectively around __________ percent.

80 and 97

25 and 97

95 and 100

40 and 70

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Coal bed methane (CBM)

Sewage gas

Liquefied petroleum gas (LPG)

Natural gas

TRUE ANSWER : ?
YOUR ANSWER : ?

Presence of __________ in a dry gaseous fuel does not contribute to its calorific value.

Oxygen

Carbon

Hydrogen

Sulphur

TRUE ANSWER : ?
YOUR ANSWER : ?

Micum Index of a coke is a measure of its

Porosity

Bulk density

Hardness & strength

Reactivity

TRUE ANSWER : ?
YOUR ANSWER : ?

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

10

0.5

20

2.5

TRUE ANSWER : ?
YOUR ANSWER : ?

Fuel for a fast breeder nuclear reactor is

Plutonium

Uranium

Radium

Neptunium

TRUE ANSWER : ?
YOUR ANSWER : ?

↑