Increase in calorific value of the fuel
Increase in flame temperature
Reduction in scale losses
Saving in fuel consumption
✅ The correct answer is option A.
Furnace Technology MCQs
2. Shaft furnaces are used for
Smelting
Calcining
Roasting
All of the above
✅ The correct answer is option D.
3. Regenerators are normally provided in the
Glass melting furnace
Open hearth furnace
By product coke ovens
All of the above
✅ The correct answer is option D.
4. Unit of furnace loading is
Ton stock/hr/m² hearth area
Ton stock/hr
Ton stock/m² hearth area
Both B and C
✅ The correct answer is option A.
5. Very high pressure boilers are usually __________ boilers.
Fire tube
Water tube
Waste heat
Natural circulation
✅ The correct answer is option D.
6. Turndown ratio of a burner gives an idea of the __________ in the furnace.
Range of fuel firing rates
Volume of the combustion chamber
Maximum heat input rate only
Minimum heat input rate only
✅ The correct answer is option A.
7. Which of the following is not a directly fired furnace?
By-product coke oven
Calcination kiln
Sintering furnace
Open hearth furnace
✅ The correct answer is option A.
8. Which furnace employs preheating, heating and soaking zones?
Soaking pit
Reheating furnace
Open hearth furnace
Cupola
✅ The correct answer is option B.
9. Which is not a hearth furnace?
Glass tank furnace
Open hearth furnace
Cupola
Reheating furnace
✅ The correct answer is option C.
10. Which of the following accentuates clinker-ing troubles on furnace grate burning coal?
Low reactivity of carbonised residue containing high proportion of iron & sulphur
Low forced draft & fuel bed temperature
Thick firebed and preheated primary air
All of the above
✅ The correct answer is option D.