Speed of the fan
Damper
Variation in the pitch of fan blades
All of the above
✅ The correct answer is option D.
Furnace Technology MCQs
Low stack loss indicates the
Use of sub-stoichiometric air for combustion
Efficient use of fuel
Inefficient use of fuel
Oxygen enrichment of combustion air
✅ The correct answer is option B.
Heat transfer rate to the stock/charge in the furnace does not depend upon the
Emissivity of the refactory walls
Size of the furance
Use of waste heat recovery equipments
Thickness of the stock
✅ The correct answer is option C.
The heat recoverable from flue gases of furnaces depends on the
Thermal efficiency of furnace
Quantity of flue gases
Flue gas temperature drop through the furnace
All of the above
✅ The correct answer is option D.
Which is a continuous furnace?
Coke ovens
Annealing furnace
Glass tank furnace
None of these
✅ The correct answer is option C.
Which one is not an induced draught furnace?
Blast furnace stove
Sintering furnace
High pressure boiler
None of these
✅ The correct answer is option A.
The advantages of firing pulverised coal in the furnace lies in the fact that, it
Permits the use of high ash content coal
Permits the use of low fusion point ash coal
Accelerates the burning rate and economises on fuel consumption
All of the above
✅ The correct answer is option C.
Ceramic recuperators (made of SiC) is economical, only when used for preheating combustion air above __________ °C.
250
650
850
1000
✅ The correct answer is option B.
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.
2000
3000
4500
6000
✅ The correct answer is option C.
Regenerators compared to the recuperators for the same duty
Occupy more space
Are less costly
Are of smaller size
All of the above
✅ The correct answer is option A.