Thermal efficiency of an open hearth furnace may be about __________ p – McqOptions

MCQOPTIONS

1.	Thermal efficiency of an open hearth furnace may be about __________ percent.
A.	5
B.	20
C.	50
D.	80
Answer» C. 50

Discussion

No Comment Found

Related MCQs

Which of the following is the most suitable for preheating combustion air above 650°C ?
Acid dew point temperature (ADT) of a flue gas produced by the combustion of a fuel containing 1% sulphur may be about __________ °C.
Ceramic recuperators (made of SiC) is economical, only when used for preheating combustion air above __________ °C.
In practical operation of any furnace, zero oxygen percentage or theoretical CO percentage in flue gas is rarely achieved, because of
Combustion of furnace oil in a furnace (soaking pit) with preheated combustion air at 400°C results in saving of about __________ percent furnace oil as compared to its combustion with atmospheric air, if the flue gas outlet temperature from the soaking pit is 1200°C.
While the fuel fired furnace can be used upto a maximum temperature of about 1700°C, the electric furnace can be used upto a temperature of about __________ °C.
Presence of SO in furnace gases attacks the ferrous metal by way of
Which of the following advantages is not associated with the use of preheated air for combustion of a fuel in the furnace?
In which of the waste heat recovery equipment, the flow of flue gas and air is alternately reversed after a fixed interval of time?
Which of the following is the most important deterrants to an extended use of pulverised coal in boiler firing?