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MCQs

Total Questions : 757 | Page 10 of 76 pages
Question 91. Which furnace employs preheating, heating and soaking zones?
  1.    Soaking pit
  2.    Reheating furnace
  3.    Open hearth furnace
  4.    Cupola
 Discuss Question
Answer: Option B. -> Reheating furnace
Question 92. Thickness of stock does not affect the fuel economy of furnaces, if the material to be heated is of
  1.    Low emissivity
  2.    High thermal conductivity
  3.    Both A and B
  4.    Neither A nor B
 Discuss Question
Answer: Option C. -> Both A and B
Question 93. Which is a continuous furnace?
  1.    Coke ovens
  2.    Annealing furnace
  3.    Glass tank furnace
  4.    None of these
 Discuss Question
Answer: Option C. -> Glass tank furnace
Question 94. Which is not accomplished in an underfired furnace?
  1.    Increase in heating capacity/m² of floor space
  2.    Elimination of cold spot at the bottom of the charge
  3.    Reduction in the temperature of furnace gases
  4.    Portection of the periphery of the charge from excessive radiation
 Discuss Question
Answer: Option A. -> Increase in heating capacity/m² of floor space
Question 95. Which is not a hearth furnace?
  1.    Glass tank furnace
  2.    Open hearth furnace
  3.    Cupola
  4.    Reheating furnace
 Discuss Question
Answer: Option C. -> Cupola
Question 96. Which one shows the diagramatic heat balance in a furnace?
  1.    Sankey diagram
  2.    Cox chart
  3.    Ostwald chart
  4.    None of these
 Discuss Question
Answer: Option A. -> Sankey diagram
Question 97. Fuel economy in furnaces can be achieved by
  1.    Using oxygen enriched combustion air
  2.    Preheating the combustion air
  3.    Reducing the heat loss through furnace openings & doors
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 98. Maximum heat transfer in high temperature furnaces is by
  1.    Conduction
  2.    Convection
  3.    Radiation
  4.    Either A, B or C; depends on the type of furnace
 Discuss Question
Answer: Option C. -> Radiation
Question 99. Which of the following advantages is not associated with the use of preheated air for combustion of a fuel in the furnace?
  1.    Increase in calorific value of the fuel
  2.    Increase in flame temperature
  3.    Reduction in scale losses
  4.    Saving in fuel consumption
 Discuss Question
Answer: Option A. -> Increase in calorific value of the fuel
Question 100. Operation of blast furnace stove is based on the principles of a __________ furnace.
  1.    Regenerative
  2.    Recuperative
  3.    Both A and B
  4.    Neither A nor B
 Discuss Question
Answer: Option A. -> Regenerative

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