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MCQs

Total Questions : 757 | Page 71 of 76 pages
Question 701. Temperature of a furnace fired with low calorific value fuel gas (i.e. lean gas) can be increased by______________________?
  1.    Preheating the combustion air
  2.    Oxygen enrichment of combustion air
  3.    Preheating the fuel gas
  4.    All A., B. & C.
 Discuss Question
Answer: Option D. -> All A., B. & C.
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 702. In case of pulverised coal fired steam boiler, the secondary air serves the main purpose of_________________?
  1.    Transportation of coal
  2.    Drying of coal
  3.    Combustion of coal by supplying it around the burner
  4.    Preheating the primary air
 Discuss Question
Answer: Option C. -> Combustion of coal by supplying it around the burner
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 703. 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 A., B. and C.
 Discuss Question
Answer: Option D. -> All A., B. and C.
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 704. If fuel and air are mixed ahead of the burner, it is called a/an ______________ burner?
  1.    Premix
  2.    Outside mixing type
  3.    Rotary
  4.    Diffusion
 Discuss Question
Answer: Option A. -> Premix
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 705. Which of the following accentuates clinkering troubles on furnace grate burning coal ?
  1.    Low reactivity of carbonised residue containing high proportion of iron & sulphur
  2.    Low forced draft & fuel bed temperature
  3.    Thick firebed and preheated primary air
  4.    All A., B. and C.
 Discuss Question
Answer: Option D. -> All A., B. and C.
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 706. Means for giving direction to the circulation of gases in furnaces are_____________________?
  1.    Fans
  2.    Arrangement of heating stock in the furnaces
  3.    Location of outlet ports and heating & combustion devices
  4.    All A., B. and C.
 Discuss Question
Answer: Option D. -> All A., B. and C.
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 707. Oxygen percentage in the flue gas coming out of a gaseous fuel fired furnace should be ideally about _____________ percent?
  1.    < 2
  2.    < 5
  3.    < 8
  4.    < 10
 Discuss Question
Answer: Option A. -> < 2
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 708. Cement Kiln is a___________________?
  1.    Rotary Kiln
  2.    Tunnel Kiln
  3.    Natural draft furnace
  4.    Batch furnace
 Discuss Question
Answer: Option A. -> Rotary Kiln
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 709. Which furnace employs an I.D. fan for the removal of flue gases from the furnace ?
  1.    Coke oven
  2.    Blast furnace stoves
  3.    Beehive coke oven
  4.    High pressure boiler
 Discuss Question
Answer: Option D. -> High pressure boiler
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 710. In a furnace operation, which is not preheated ?
  1.    Solid fuels
  2.    Hydrocarbon containing fuel gases (e.g. coke oven gas, refinery gas etc.)
  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!

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