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Overall thermal efficiency of a lumpy coal fired suitably designed heating furnace, if operated & maintained properly may be about ____________ percent?
Related MCQs
An example of recuperative furnace is the__________?
In a furnace employing forced draught as compared to induced draught__________?
Which is a regenerative furnace ?
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Reverberatory furnace is used for__________?
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Cement Kiln is a__________?
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Means for giving direction to the circulation of gases in furnaces are__________?
Heat balance of furnace provides means of determining the__________?
If fuel and air are mixed ahead of the burner, it is called a/an __________ burner?
Temperature of a furnace fired with low calorific value fuel gas (i.e. lean gas) can be increased by__________?
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Which of the following variables does not affect the furnace capacity ?
Circulation of gases in furnace is caused by the__________?
Which is not accomplished in an underfired furnace ?
The purpose of controlling the furnace atmosphere is to prevent surface attack by__________?
Regenerators as compared to recuperators for the same duty__________?
Dampers are located__________?
The resistance furnace produces heat by the__________?
Thickness of stock does not affect the fuel economy of furnaces, if the material to be heated is of__________?
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The thermal efficiency of a steel slab reheating furnace (walking beam type) may be about __________ percent?
In low or standard frequency induction furnace, heat is produced by the__________?
The rate of scaling of furnace stock depends upon the__________?
The reason for excessive clinker formation in gas producers is the__________?
In furnaces operating at very high temperature (say) 1250°C, e.g. soaking pit), the maximum heat transfer takes place by__________?
Amount of coal lost in ash particle, which is carried through the boiler system, depends upon the__________?
Coke ovens in steel plant are heated by__________?
Specific heating capacity of a furnace is expressed as__________?
Unit of furnace loading is__________?
Thermal efficiency of a limestone calcination rotary kiln may be around __________ percent?
Maximum thermal efficiency of boiler may be about __________ percent?
Advantages of use of preheated combustion air are__________?
Thermal efficiency of blast furnace stoves used for heating blast (air) may be about __________ percent?
Very high pressure boilers are usually __________ boilers?
Pot furnace which is either regenerative or recuperative, is used in the manufacture of__________?
Soaking pits are meant for heating steel__________?
Overall thermal efficiency of a lumpy coal fired suitably designed heating furnace, if operated & maintained properly may be about ____________ percent?
A. 10-15
B. 25-30
C. 45-50
D. 65-70
Correct Answer:
25-30
✔
Last Updated:
March 11, 2019