FUELS AND COMBUSTION QUIZ

Coking time in beehive coke oven is about

2-3 days

Two weeks

12 hours

One week

TRUE ANSWER : ?
YOUR ANSWER : ?

Net calorific value is the gross calorific value less the __________ heat of water in the product of combustion when cooled to 15°C.

Latent

Sensible and latent

None of these

Sensible

TRUE ANSWER : ?
YOUR ANSWER : ?

High amount of sulphur and phosphorous in coke causes

None of these

Increase in its strength

Brittleness of steel made by using it

Decrease in its calorific value

TRUE ANSWER : ?
YOUR ANSWER : ?

Low temperature oxidation of coal during storage does not decrease its

Caking power

Calorific value

None of these

Oxygen content

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following gaseous fuels has the lowest calorific value?

Converter gas

Blast furnace gas

Gobar gas

Refinery gas

TRUE ANSWER : ?
YOUR ANSWER : ?

Calorific value of pitch creosote mixture (PCM) i.e., C.T.F.-200 is about

8800 kcal/m³

25000 kcal/kg

Same as that of coal middling

8800 kcal/kg

TRUE ANSWER : ?
YOUR ANSWER : ?

Fixed carbon in coal is defined as

That present in volatile matters

The total quantity of carbon present in the coal

Hundred minus the percentage of volatile matter, ash and moisture

The one which is present in the residue after combustion

TRUE ANSWER : ?
YOUR ANSWER : ?

Quantity of coke produced from metallurgical coal may be around __________ percent.

30

75

50

95

TRUE ANSWER : ?
YOUR ANSWER : ?

Mineral matter, 'M' and ash percentage 'A' in coal are roughly related as

M = 1.1 A

M = 0.5 A

M = A

M = 1.8 A

TRUE ANSWER : ?
YOUR ANSWER : ?

Benzol is used

As a motor fuel blend

Neither A nor B

For producing benzene, tolune & xylene by its distillation

Both A & B

TRUE ANSWER : ?
YOUR ANSWER : ?