Temperature of preheated air used for the transportation of pulverised coal through pipes to the burner of a boiler furnace is restricted to a maximum limit of about 300° C to avoid the___________________?

Related Mcqs:

Bunsen burner is an example of a/an _____________ burner?

A. Inside mixing/premix type B. Outside mixing/diffusion flame/nozzle mix type C. Rotary cup D. Submerged combustion...

Which is the most matured coal ?

A. Lignite B. Bituminous C. Semi-anthracite D. Anthracite...

Correct viscosity of furnace oil at the burner tip for proper atomisation is about 25 centistokes. To reduce the viscosity of high viscosity furnace oil (250 centistokes) to the correct atomisation viscosity (i.e. 25 cst), it should be preheated to about ______________°C?

A. 70 B. 85 C. 105 D. 145...

Volatile matter content in coking coal may be about _____________ percent?

A. 1 B. 7 C. 22 D. 46...

Yield of pitch from distillation of high temperature tar is around _____________ percent?

A. 10 B. 25 C. 65 D. 90...