21 AUGUST 2021 CURRENT AFFAIRS QUIZ

CSR & CRI

Volatile matter content

Ash content

Moisture content

Higher calorific value

Both A & B

Neither A nor B

Lower hydrogen content

Junkar's

Boy's

Bomb

None of these

Preheated secondary air

Very little excess air

Low amount/current of combustion air

High amount/current of combustion air

Coking tendency

Size stability

Clinkering tendency

Caking tendency

15 to 25

55 to 75

35 to 45

75

Hydrogen content of coke oven gas increases due to cracking of hydrocarbons

All of these

Methane content in the coke oven gas decreases and carbon monoxide content increases

Calorific value of the coke oven gas decreases due to cracking of hydrocarbons which is not compensated by increase in CO & H? content

> 1

1

Unpredicatable

All of these

Sulphur content is lower

Flue gas has lower dew point thereby facilitating more waste heat recovery

Emissivity factor is higher

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

Because, it alone produces unreactive coke

Neither A nor B

Both A & B