FUELS AND COMBUSTION QUIZ

5

75

55

25

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

None of these

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

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

Heating value

None of these

S & P content

Fusion point of ash

Maximum 200 tons should be stored in a heap

Both A and B

Neither A nor B

Height of the coal heap should be < 3 metres

Increases

Decreases

Remains constant

None of these

Is not undersirable

Reduces its calorific value

Increases its caking power

Badly affects the quality of steel

15, 000

5000

25, 000

10, 000

Singreni (AP.)

Raniganj

Dankuni (West Bengal)

Dhanbad

Washing

Pulverisation

Storage

Transportation and handling

Dry the coal

Reduce primary air requirement

Transport the coal to the burner

Ensure efficient burning of coal around the burner