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.Management Sciences
Category: Furnace Technology
Rate of heat release in a furnace, which is the measure of heat intensity, is defined as_________________?
A. kcal/hr/m3 combustion space
B. kcal/m3 combustion space
C. kcal/hr
D. None of these
In low or standard frequency induction furnace, heat is produced by the_______________________?
A. Combination of induced current and skin effect
B. Induction and resistance
C. Current flow through a heating element
D. None of these
If fuel and air are mixed ahead of the burner, it is called a/an ______________ burner?
A. Premix
B. Outside mixing type
C. Rotary
D. Diffusion
Coke ovens in steel plant are heated by____________________?
A. Electricity
B. Blast furnace gas/mixed gas
C. Coke oven gas
D. Both B. and C.
Circulation of gases in furnace is caused by the_________________?
A. Change in volume during a change of temperature
B. Difference in density between hot and cold gases
C. Furnace pressure in conjunction with draft in flues
D. All A., B. and C.
Regenerators are normally provided in the____________________?
A. Glass melting furnace
B. Open hearth furnace
C. By product coke ovens
D. All A., B. and C.
Neutral atmosphere is maintained in a/an ____________ furnace?
A. Cold rolled steel coil annealing
B. Open hearth
C. Soaking pit
D. Walking beam reheating
An example of a periodic furnace is the__________________?
A. Blast furnace stoves
B. Blast furnace
C. Coke oven heating chamber
D. Rotary kilns
In salt bath furnace, heat is transferred to the charge mainly by __________________?
A. Conduction
B. Convection
C. Radiation
D. None of these
Which of the following is the most important deterrents to an extended use of pulverised coal in boiler firing ?
A. Ash disposal problem
B. Excessive fly ash discharge from the stack
C. Higher power consumption in its transportation
D. Erosion of induced draft fan blades
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