Minimum thermal efficiency of a steam boiler may be around __________ percent

Question: Fussain
[A].

is friable, charcoal like substance.

[B].

has highest fixed carbon and lowest volatile matter content of all the four banded components of coal.

[C].

is non-coking, but when blended with highly coking coal, controls its swelling and produces high strength coke on carbonisation.

[D].

all (a), (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question.

Question: For the case of a fuel gas undergoing combustion with air, if the air/fuel ratio is increased, the adiabatic flame temperature will
[A].

increase

[B].

decrease

[C].

increase or decrease depending on the fuel type

[D].

not change

Answer: Option B

Explanation:

No answer description available for this question.