Furnace Technology(Chemical Engineering ) Questions and Answers

Question 1. Acid dew point temperature (ADT) of a flue gas produced by the combustion of a fuel containing 1% sulphur may be about __________ °C.
  1.    80
  2.    130
  3.    180
  4.    250
Explanation:-
Answer: Option B. -> 130
Question 2. Waste heat from the outgoing flue gases in a thermal power plant is recovered by a/an
  1.    Economiser
  2.    Steam superheater
  3.    Air preheater
  4.    All of the above
Explanation:-
Answer: Option D. -> All of the above
Question 3. In producer gas making furnace, steam is added along with air to mainly control the
  1.    Fusion of coal ash & clinker formation
  2.    C. V. of producer gas
  3.    Temperature of producer gas
  4.    Tar content in producer gas
Explanation:-
Answer: Option A. -> Fusion of coal ash & clinker formation
Question 4. Heat balance of furnace provides means of determining the
  1.    Thermal efficiency of the process
  2.    Sources of heat losses
  3.    Scope of reduction of heat losses
  4.    All of the above
Explanation:-
Answer: Option D. -> All of the above
Question 5. Which furnace employs natural draft?
  1.    Coke oven
  2.    Boiler
  3.    Rotary kilns
  4.    L.D. converter
Explanation:-
Answer: Option A. -> Coke oven
Question 6. Reducing atmosphere is maintained in a
  1.    Calcination kiln
  2.    Blast furnace
  3.    Soaking pit
  4.    L.D. converter
Explanation:-
Answer: Option B. -> Blast furnace
Question 7. __________ is an indirectly heated furnace.
  1.    Open hearth furnace
  2.    Muffle furnace
  3.    Soaking pit
  4.    Reheating furnace
Explanation:-
Answer: Option B. -> Muffle furnace
Question 8. Which of the following variables does not affect the furnace capacity?
  1.    Size of the furnace
  2.    Gas velocity in furnace
  3.    Ratio of wall surface to surface of stock
  4.    None of these
Explanation:-
Answer: Option D. -> None of these
Question 9. Overfire burning in a furnace is a phenomenon characterised by
  1.    Supply of excess fuel
  2.    Supply of excess air
  3.    Burning carbon monoxide and other incombustible in upper zone of furnace by supplying more air
  4.    None of these
Explanation:-
Answer: Option C. -> Burning carbon monoxide and other incombustible in upper zone of furnace by supplying more air
Question 10. Thermal efficiency of a limestone calcination rotary kiln may be around __________ percent.
  1.    20
  2.    40
  3.    65
  4.    80
Explanation:-
Answer: Option B. -> 40
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