Thermal efficiency of blast furnace stoves used for heating blast (air) may be a

Thermal efficiency of blast furnace stoves used for heating blast (air) may be about __________ percent.

Maximum thermal efficiency of boiler may be about __________ percent.

Maximum thermal efficiency of boiler may be about __________ percent.

Overall thermal efficiency of a lumpy coal fired suitably designed heating furna

Overall thermal efficiency of a lumpy coal fired suitably designed heating furnace, if operated & maintained properly may be about __________ percent.

Thermal efficiency of an open hearth furnace may be about __________ percent.

Thermal efficiency of an open hearth furnace may be about __________ percent.

Furnace pressure is normally controlled by regulating the

Furnace pressure is normally controlled by regulating the

Which of the following is a directly fired intermittant furnace?

Which of the following is a directly fired intermittant furnace?

To reduce the stack loss, heat recovery from flue gas can be done by

To reduce the stack loss, heat recovery from flue gas can be done by

Specific heating capacity of a furnace is expressed as

Specific heating capacity of a furnace is expressed as

Ceramic recuperators (made of SiC) is economical, only when used for preheating

Ceramic recuperators (made of SiC) is economical, only when used for preheating combustion air above __________ °C.

In which of the waste heat recovery equipment, the flow of flue gas and air is a

In which of the waste heat recovery equipment, the flow of flue gas and air is alternately reversed after a fixed interval of time?

Turndown ratio of a burner gives an idea of the __________ in the furnace.

Turndown ratio of a burner gives an idea of the __________ in the furnace.

Furnace aerodynamics is related to the __________ in the furnace.

Furnace aerodynamics is related to the __________ in the furnace.