Amount of coal lost in ash particle, which is carried through the boiler system, depends upon the__________________?

Physical nature, ash content and fineness of the coal

Amount of excess air supplied and load on the boiler

Type of burner and combustion chamber

Amount of coal lost in ash particle, which is carried through the boil

1.	Amount of coal lost in ash particle, which is carried through the boiler system, depends upon the__________________?
A.	Physical nature, ash content and fineness of the coal
B.	Amount of excess air supplied and load on the boiler
C.	Type of burner and combustion chamber
D.	All A., B. and C.
Answer» E.