Premix
Outside mixing type
Rotary
Diffusion
✅ The correct answer is option A.
Furnace Technology MCQs
Scaling of furnace stock is reduced by __________ in flue gas.
CO
H₂
High CO/CO₂
All of the above
✅ The correct answer is option D.
Large tonnage of refractory bricks are dried in a
Shaft furnace
Rotary hearth furnace
Tunnel kiln
Muffle furnace
✅ The correct answer is option C.
In order to maintain a reducing atmosphere in a furnace, it should have
No O₂ in flue gas
CO in flue gas
High excess air
None of these
✅ The correct answer is option B.
If the flame is produced under the hearth and then sweeps up into the heating chamber, this is called a/an __________ furnace.
Sidefired
Underfired
Covered
Recirculating
✅ The correct answer is option B.
Which of the following is the most suitable for preheating combustion air above 650°C ?
Regenerator
Metallic recuperator
Ceramic recuperator
None of these
✅ The correct answer is option C.
Advantages of use of preheated combustion air are
Saving in fuel consumption
Reduction in scale losses
Increase in flame temperature
All of the above
✅ The correct answer is option D.
Calcination of limestone to produce lime is done in a __________ kiln.
Tunnel
Rotary
Vertical shaft
Both B and C
✅ The correct answer is option D.
In producer gas making furnace, steam is added along with air to mainly control the
Fusion of coal ash & clinker formation
V. of producer gas
Temperature of producer gas
Tar content in producer gas
✅ The correct answer is option A.
Neutral atmosphere is maintained in a/an __________ furnace.
Cold rolled steel coil annealing
Open hearth
Soaking pit
Walking beam reheating
✅ The correct answer is option A.