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MCQs

Total Questions : 757 | Page 70 of 76 pages
Question 691. The purpose of controlling the furnace atmosphere is to prevent surface attack by__________________?
  1.    Oxidation/scaling
  2.    Decarburising
  3.    Sulphur penetration
  4.    Either of the above
 Discuss Question
Answer: Option D. -> Either of the above
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 692. 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
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 693. Use of pulverised coal in boilers provides____________________?
  1.    Higher calorific value
  2.    Better combustion
  3.    Smokeless burning
  4.    Less erosion on furnace wall
 Discuss Question
Answer: Option B. -> Better combustion
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 694. 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
 Discuss Question
Answer: Option D. -> None of these
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 695. Which of the following is not a continuous waste heat recovery equipment from the flue gases going out of furnace ?
  1.    Economiser
  2.    Regenerator
  3.    Ceramic recuperator
  4.    Waste heat boiler
 Discuss Question
Answer: Option B. -> Regenerator
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 696. An example of a periodic furnace is the__________________?
  1.    Blast furnace stoves
  2.    Blast furnace
  3.    Coke oven heating chamber
  4.    Rotary kilns
 Discuss Question
Answer: Option A. -> Blast furnace stoves
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 697. 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 A., B. and C.
 Discuss Question
Answer: Option D. -> All A., B. and C.
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 698. Circulation of gases in furnace is caused by the_________________?
  1.    Change in volume during a change of temperature
  2.    Difference in density between hot and cold gases
  3.    Furnace pressure in conjunction with draft in flues
  4.    All A., B. and C.
 Discuss Question
Answer: Option D. -> All A., B. and C.
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 699. Example of an indirectly heated furnace is__________________?
  1.    Hood annealing furnace
  2.    Muffle furnace
  3.    Both A. and B.
  4.    Neither A. nor B.
 Discuss Question
Answer: Option C. -> Both A. and B.
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 700. Which of the following is a directly fired intermittent furnace ?
  1.    Walking beam reheating furnace
  2.    Reverberatory furnace
  3.    Tower furnace
  4.    Tunnel kiln
 Discuss Question
Answer: Option B. -> Reverberatory furnace
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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