2492. Dampers are located
Before the I.D fan
After the I.fan
Near the top of the chimney
Anywhere after the I.fan
✅ The correct answer is option A.
2457. In order to maintain an oxidising atmosphere in a furnace, it should have
More of excess air
Less of excess air
More of CO in flue gas
More of CO₂ in flue gas
✅ The correct answer is option A.
2464. Pot furnace which is either regenerative or recupterative, is used in the manufacture of
Glass
Stainless steel
Potteries
Refractory bricks
✅ The correct answer is option A.
2467. Air filtration in a furnace
Reduces its thermal efficiency
Is indicated by flame sting out
Increases the flue gas temperature
None of these
✅ The correct answer is option A.
2473. Which of the following is not a continuous waste heat recovery equipment from the flue gases going out of furnace?
Economiser
Regenerator
Ceramic recuperator
Waste heat boiler
✅ The correct answer is option B.
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.
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.
2487. __________ furnace is not an electric furnace.
Arc
Induction
Pot
Resistance
✅ The correct answer is option C.
2493. If fuel and air are mixed ahead of the burner, it is called a/an __________ burner.
Premix
Outside mixing type
Rotary
Diffusion
✅ The correct answer is option A.
2458. Which of the following furnaces will have maximum thermal efficiency?
Soaking pits
Walking beam reheating furnace
Boiler furnace
Rotary kilns
✅ The correct answer is option C.