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Ceramic recuperators (made of SiC) is economical, only when used for preheating combustion air above _____________ °C?
Related MCQs
Regenerators are used for waste heat recovery in__________?
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 ?
In a muffle furnace, the muffle__________?
Hearth furnaces are not used for__________?
Decarburisation of steel__________?
Maximum heat transfer in high temperature furnaces is by__________?
Design of waste heat boiler for recovery of waste heat from furnace gases depends upon the__________?
Rate of heat release in a furnace, which is the measure of heat intensity, is defined as__________?
Ceramic recuperators compared to metallic recuperators for the same duty__________?
Regenerators compared to the recuperators for the same duty__________?
Combustion of fuel in a furnace with oxygen enriched air results in higher__________?
Which is not a hearth furnace ?
Turn down ratio of a burner__________?
Main gas valve in a gaseous fuel burner is a __________ valve?
Pulverised fuel fired furnaces employ __________ fuel firing?
Which of the following is a periodic furnace ?
Furnace aerodynamics is related to the __________ in the furnace?
The heating capacity of muffle furnace depends on the__________?
The heating capacity of muffle furnace depends on the__________?
In salt bath furnace, heat is transferred to the charge mainly by __________?
An example of shaft furnace is the__________?
Which of the following is not a recuperative furnace ?
The thermal efficiency of an air/fuel gas preheating recuperator may be as high as __________ percent?
Which of the following is a batch furnace ?
Flue gas outlet temperature from the chimney of any furnace should be ideally about __________ °C?
In a furnace, the heat taken by the charge/stock and the heat lost to the furnace structure & flue gases depends on the__________?
Forced recirculation of furnace gases is practised__________?
An improved and fuel efficient version of the pusher type reheating furnace is the __________ furnace?
Scaling of furnace stock is reduced by __________ in flue gas?
Which of the following variables affects the furnace capacity ?
Ceramic recuperators (made of SiC) is economical, only when used for preheating combustion air above _____________ °C?
A. 250
B. 650
C. 850
D. 1000
Correct Answer:
650
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Last Updated:
March 11, 2019