FUELS AND COMBUSTION QUIZ

The cuprous chloride used in orsat apparatus can absorb

Both CO and O₂

Both CO and CO₂

Only CO

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Mott and Wheeler test is conducted on coke to find its

Reactivity with O₂

Phosphorus content

Abradability

Volatile matter content

TRUE ANSWER : ?
YOUR ANSWER : ?

The main drawback of supplying more excess air in the combustion of fuel is the

Excessive power requirement of air blower

Enhanced sensible heat loss in the flue gas

Intermittant and uncontrolled combustion of the fuel

High exit flue gas temperature from the furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

The calorific value of producer gas is around __________ kcal/Nm³

1300

9000

500

4500

TRUE ANSWER : ?
YOUR ANSWER : ?

Pick out the wrong statement.

Low grade coal can be used, but generally high volatile matter coals are more suitable for making pulverised fuel

Regulation of furnace temperature and atmosphere (oxidising or reducing) is easily possible with pulverised fuel firing

None of these

Pulverised fuel can be completely burnt with less percentage of excess air compared to lump coal

TRUE ANSWER : ?
YOUR ANSWER : ?

'Mixed gas' used in steel plants is a mixture of

F. gas and coke oven gas

Blast furnace gas and naphtha vapor

Coke oven gas and converter gas

Coke oven gas and L.P.G

TRUE ANSWER : ?
YOUR ANSWER : ?

Temperature of coke oven gas just before entering into saturator (for recovery of NH₃) is about __________ °C.

120

65

180

30

TRUE ANSWER : ?
YOUR ANSWER : ?

Percentage of carbon monoxide in blast furnace gas may be around

14

52

8

22

TRUE ANSWER : ?
YOUR ANSWER : ?

Fixed carbon in coal is defined as

The one which is present in the residue after combustion

Hundred minus the percentage of volatile matter, ash and moisture

That present in volatile matters

The total quantity of carbon present in the coal

TRUE ANSWER : ?
YOUR ANSWER : ?

Low temperature carbonisation of coal produces

Very low calorific value coke oven gas

Metallurgical coke

No by-products

Soft coke

TRUE ANSWER : ?
YOUR ANSWER : ?