Furnace Technology MCQs Archives

71. The reason for excessive clinker formation in gas producers is the

Use of coal/coke containing a high % of fines and ash

Use of fuel having too low an ash fusion temperature

Development of hot spots in the fuel bed and an abnormally high rate of gasification

All of the above

✅ The correct answer is option D.

72. Design of waste heat boiler for recovery of waste heat from furnace gases depends upon the

Quantity & temperature of waste gas

Dust concentration & nature of dust in waste gas

Corrosive nature of the waste gas

All of the above

✅ The correct answer is option B.

73. Operation of blast furnace stove is based on the principles of a __________ furnace.

Regenerative

Recuperative

Both A and B

Neither A nor B

✅ The correct answer is option A.

74. The purpose of controlling the furnace atmosphere is to prevent surface attack by

Oxidation/scaling

Decarburising

Sulphur penetration

Either of the above

✅ The correct answer is option D.

75. Which furnace employs natural draft?

Coke oven

Boiler

Rotary kilns

L.converter

✅ The correct answer is option A.

76. A refractory wall separating the stock and the source of heat is provided in a

Updraft kiln

Muffle furnace

Continuous furnace

None of these

✅ The correct answer is option B.

77. In low or standard frequency induction furnace, heat is produced by the

Combination of induced current and skin effect

Induction and resistance

Current flow through a heating element

None of these

✅ The correct answer is option B.

78. Which of the following variables does not affect the furnace capacity?

Size of the furnace

Gas velocity in furnace

Ratio of wall surface to surface of stock

None of these

✅ The correct answer is option D.

79. Which is not accomplished in an underfired furnace?

Increase in heating capacity/m² of floor space

Elimination of cold spot at the bottom of the charge

Reduction in the temperature of furnace gases

Portection of the periphery of the charge from excessive radiation

✅ The correct answer is option A.

80. Furnace aerodynamics is related to the __________ in the furnace.

Movement of gases

Measurement of flue gas volume

Temperature control

Pressure adjustment

✅ The correct answer is option A.