2483. Which of the following is a batch furnace?
Cupola
Reheating furnace
Glass tank furnace
None of these
✅ The correct answer is option A.
2488. Out of the following fuels used in a furnace exhausting flue gas at a temperature of 600°C, the percentage stack loss will be maximum in case of complete combustion of
Furnace oil with air
Furnace oil with oxygen
Blast furnace gas with air
Blast furnace gas with oxygen
✅ The correct answer is option C.
2491. Power required in case of forced draught as compared to induced draught (for the same draught produced) is
Same
Less
More
Either more or less; depends on the flue gas density
✅ The correct answer is option B.
2456. Flue gas outlet temperature from the chimney of any furnace should be ideally about __________ °C.
50
100
150
250
✅ The correct answer is option C.
2463. In reverberatory furnace, charge is heated mainly by
Conduction
Natural convection
Radiation of heat from the roof of the combustion chamber
None of these
✅ The correct answer is option C.
2469. Hearth furnaces are not used for
Roasting
Melting
Reheating
None of these
✅ The correct answer is option D.
2476. Pulverised fuel fired furnaces employ __________ fuel firing.
Horizontal
Vertical
Tangential
All of the above
✅ The correct answer is option D.
2480. The thermal efficiency of an air/fuel gas preheating recuperator may be as high as __________ percent.
50
65
85
99
✅ The correct answer is option C.
2485. Blast furnace stoves are meant for heating
Air
Blast furnace gas
Steam
None of these
✅ The correct answer is option A.
2489. Rate of heat release in a furnace, which is the measure of heat intensity is defined as
Kcal/hr/m³ combustion space
Kcal/m³ combustion space
Kcal/hr
None of these
✅ The correct answer is option A.