2481. Forced recirculation of furnace gases is practised
To increase heat transfer by convection
To ensure uniform temperature
In furnaces, operating below 750°C
All of the above
✅ The correct answer is option D.
Chemical Engineering
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2482. An improved and fuel efficient version of the pusher type reheating furnace is the __________ furnace.
Walking beam
Shaft
Tunnel
Rotary hearth
✅ The correct answer is option A.
2483. Which of the following is a batch furnace?
Cupola
Reheating furnace
Glass tank furnace
None of these
✅ The correct answer is option A.
2484. Which of the following is the most important deterrants to an extended use of pulverised coal in boiler firing?
Ash disposal problem
Excessive fly ash discharge from the stack
Higher power consumption in its transportation
Erosion of induced draft fan blades
✅ The correct answer is option A.
2485. Blast furnace stoves are meant for heating
Air
Blast furnace gas
Steam
None of these
✅ The correct answer is option A.
2486. Cement Kiln is a
Rotary Kiln
Tunnel Kiln
Natural draft furnace
Batch furnace
✅ The correct answer is option A.
2487. __________ furnace is not an electric furnace.
Arc
Induction
Pot
Resistance
✅ The correct answer is option C.
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.
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.
2490. Higher furnace temperature can not be achieved by use of a lean fuel gas in the furnace by
Increasing the draft in the furnace
Preheating the fuel gas
Oxygen enrichment of combustion air
Preheating the combustion air
✅ The correct answer is option A.