FUELS AND COMBUSTION QUIZ

Preheating of a gaseous fuel results in increased

Flame length

Quantity of flue gas

Flame temperature

Ignition temperature

TRUE ANSWER : ?
YOUR ANSWER : ?

Yield of coke oven gas in low temperature carbonisation of coal is about __________ Nm³ /ton of dry coal.

60

750

160

500

TRUE ANSWER : ?
YOUR ANSWER : ?

Flue gas from the heating chamber of byproduct coke ovens is removed by

Steam ejector

Forced draft fan

Induced draft fan

Natural draft

TRUE ANSWER : ?
YOUR ANSWER : ?

Largest constituent of coke oven gas is

CH₄

H₂

CO₂

N₂

TRUE ANSWER : ?
YOUR ANSWER : ?

Spontaneous combustion of coal on storage results due to

Low temperature oxidation

Storage in large heaps with small surface to volume ratio

Inadequate ventilation

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

A coal having high ratio of volatile matter to fixed carbon as compared to a coal having low ratio of volatile matter to fixed carbon

Is more difficult to ignite and produces a shorter flame

None of these

Is less liable to spontaneous combustion on storage

Requires smaller combustion space and less secondary air

TRUE ANSWER : ?
YOUR ANSWER : ?

Efficient burning of anthracite coal requires

High excess air

Fine grinding

Low preheat of air

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Use of pulverised coal in boiler furnace provides

High calorific value

Better combustion

Smokeless burning

Less erosion on furnace walls

TRUE ANSWER : ?
YOUR ANSWER : ?

The cuprous chloride used in orsat apparatus can absorb

All of these

Both CO and CO₂

Only CO

Both CO and O₂

TRUE ANSWER : ?
YOUR ANSWER : ?

Low temperature oxidation of coal is accelerated by the

Storage in large heaps

All of these

Storage in compressed piles

Absence of porous or friable particles

TRUE ANSWER : ?
YOUR ANSWER : ?