31. Furnace pressure is normally controlled by regulating the
Air pressure
Fuel gas pressure
Speed of I.fan
Damper
✅ The correct answer is option D.
Furnace Technology MCQs
32. Thickness of stock does not affect the fuel economy of furnaces, if the material to be heated is of
Low emissivity
High thermal conductivity
Both A and B
Neither A nor B
✅ The correct answer is option C.
33. Soaking pits are meant for heating steel
Ingots
Coils
Sheets
Slabs
✅ The correct answer is option A.
34. In which of the waste heat recovery equipment, the flow of flue gas and air is alternately reversed after a fixed interval of time?
Recuperator
Regenerator
Waste heat boiler
None of these
✅ The correct answer is option B.
35. Specific heating capacity of a furnace is expressed as
Weight heated/hr
Weight heated/furnace volume
Weight heated/hr/furnace volume
None of these
✅ The correct answer is option C.
36. In which of the following furnaces, the gases are sucked through the stock bed from below?
Soaking pit
Sintering machine
Beehive oven
None of these
✅ The correct answer is option B.
37. Regenerators are used for waste heat recovery in
By-product coke ovens
Beehive coke oven
Blast furnace stoves
Soaking pits
✅ The correct answer is option A.
38. Recuperator is
Not used for fuel gas preheating
An intermittant waste heat recovery equipment
A continuous waste heat recovery equipment
Heavier than regenerator meant for the same duty
✅ The correct answer is option C.
39. In a muffle furnace, the muffle
Retards the heat transfer
Assists in temperature equalisation in the charge
Permits the use of controlled atmosphere for the protection of stock
All of the above
✅ The correct answer is option D.
40. Heat transfer takes place through a liquid medium surrounding the submerged material under heating, in case of a/an
Blast furnace
Steam boiler
Salt bath furnace
Annealing furnace
✅ The correct answer is option C.