In case of pulverised coal fired steam boiler, the secondary air serves the main purpose of__________________?

Related Mcqs:

Which of the following would require least amount of secondary air for combustion ?

A. Coke breeze containing 25% ash and 2% volatile matter B. Anthracite containing 10% volatile matter and 8% ash C. Bituminous coal containing 20% ash and 25% volatile matter D. Semi-bituminous coal containing 25% ash and 20% volatile matter...

Very ______________ coals are completely devoid of cokability i.e., it is non-coking ?

A. Young B. Mature C. Both A & B D. Neither A nor B...

In general, the limit of inflammability/explosion limit of fuel gases is widened by the__________________?

A. Increase in gas pressure B. Increase in temperature (i.e. preheating) C. Use of pure oxygen for combustion instead of air D. All A., B. & C....

Calorific value of a typical dry anthracite coal may be around _____________ Kcal/kg?

A. 1000 B. 4000 C. 8000 D. 15000...

Naphthalene is removed from coke oven gas by________________?

A. Scrubbing with wash oil (a petroleum product) B. Adsorbing on bog iron bed C. Absorbing in vetro-coke solution D. None of these...