FUELS AND COMBUSTION QUIZ

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

Remain unchanged

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

Decrease

Increase

TRUE ANSWER : ?
YOUR ANSWER : ?

'Wind loss' resulting from unscientific storage of coal may be the order of about __________ percent.

10.5

2.5

14.5

7.5

TRUE ANSWER : ?
YOUR ANSWER : ?

Increase in ash content of blast furnace coke

Does not affect its consumption in the furnace

Decreases its hardness and abrasion resistance

Increases its consumption in the furnace

Reduces its consumption in the furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

A coal with high __________ content, would ignite most easily.

Oxygen

Ash

Volatile matter

Fixed carbon

TRUE ANSWER : ?
YOUR ANSWER : ?

If CO₂ is not fully absorbed by the KOH solution meant for its absorption in the orsat apparatus, it will appear as

SO₂

CO

O₂

N₂

TRUE ANSWER : ?
YOUR ANSWER : ?

Coke oven gas compared to blast furnace gas is

All of these

Less poisonous

Lighter

More explosive and inflammable

TRUE ANSWER : ?
YOUR ANSWER : ?

While the first commercial low temperature coal carbonisation plant is located at Neyveli (in Chennai), the second such plant has been built at

Singreni (AP.)

Raniganj

Dankuni (West Bengal)

Dhanbad

TRUE ANSWER : ?
YOUR ANSWER : ?

Use of pulverised coal in boiler furnace provides

Smokeless burning

Better combustion

High calorific value

Less erosion on furnace walls

TRUE ANSWER : ?
YOUR ANSWER : ?

Calorific value of

N-paraffin is lower than that of iso-paraffins of the same compounds

Light paraffinic fuel oils is equal to that of equivalent olefins

Light paraffinic fuel oils is higher than that of equivalent olefins

Light paraffinic fuel oils is lower than that of equivalent olefins

TRUE ANSWER : ?
YOUR ANSWER : ?

A good quality coal should have

High sulphur

None of these

High ash content

Low fusion point of ash

TRUE ANSWER : ?
YOUR ANSWER : ?