Ceramic coating material for furnace refractory, which increases its e – McqOptions

MCQOPTIONS

1.	Ceramic coating material for furnace refractory, which increases its emissivity and thus the radiation heat transfer rate in the furnace, comprises of?
A.	Graphite powder
B.	Thoria
C.	Zircon powder
D.	Beryllium
Answer» D. Beryllium

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?