A. Fire tube
B. Water tube
C. Waste heat
D. Natural circulation
Related Mcqs:
- Use of pulverised coal in boilers provides____________________?
A. Higher calorific value
B. Better combustion
C. Smokeless burning
D. Less erosion on furnace wall - The thermal efficiency of an air/fuel gas preheating recuperator may be as high as _____________ percent?
A. 50
B. 65
C. 85
D. 99 - Maximum heat transfer in high temperature furnaces is by____________________?
A. Conduction
B. Convection
C. Radiation
D. Either A., B. or C.; depends on the type of furnace - In furnaces operating at very high temperature (say) 1250°C, e.g. soaking pit), the maximum heat transfer takes place by__________________?
A. Conduction
B. Convection
C. Radiation
D. Cannot be predicted - Furnace pressure is normally controlled by regulating the__________________?
A. Air pressure
B. Fuel gas pressure
C. Speed of I.D. fan
D. Damper - Furnace aerodynamics is related to the _____________ in the furnace?
A. Movement of gases
B. Measurement of flue gas volume
C. Temperature control
D. Pressure adjustment - Ceramic recuperators (made of SiC) is economical, only when used for preheating combustion air above _____________ °C?
A. 250
B. 650
C. 850
D. 1000 - Thermal efficiency of blast furnace stoves used for heating blast (air) may be about _____________ percent?
A. 20
B. 40
C. 60
D. 80 - _____________ furnace is not an electric furnace?
A. Arc
B. Induction
C. Pot
D. Resistance - Metallic recuperators are not used for waste heat recovery, if the hot flue gas temperature is above _____________ °C, because corrosion prevails at higher temperatures?
A. 350
B. 750
C. 1050
D. 1250
