81. Heat balance of furnace provides means of determining the
Thermal efficiency of the process
Sources of heat losses
Scope of reduction of heat losses
All of the above
✅ The correct answer is option D.
Furnace Technology MCQs
82. 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.
83. Large tonnage of refractory bricks are dried in a
Shaft furnace
Rotary hearth furnace
Tunnel kiln
Muffle furnace
✅ The correct answer is option C.
84. 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.
85. 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.
86. 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.
87. 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.
88. 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.
89. 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.
90. 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.