Furnace Technology MCQs with answers Page - 5

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A

Admin • 833K Points
Coach

Q. Forced recirculation of furnace gases is practised

  • (A) To increase heat transfer by convection
  • (B) To ensure uniform temperature
  • (C) In furnaces, operating below 750°C
  • (D) All of the above

A

Admin • 833K Points
Coach

Q. The amount of combustible escaping uncon-sumed from the furnace, depends upon the

  • (A) Air supplied and furnace temperature
  • (B) Burner design (thoroughness of mixing versus stratification)
  • (C) Air preheat and the flow of gases in the furnace (mixing by induction, by acceleration or by change of direction)
  • (D) All of the above

A

Admin • 833K Points
Coach

Q. Power required in case of forced draught as compared to induced draught (for the same draught produced) is

  • (A) Same
  • (B) Less
  • (C) More
  • (D) Either more or less; depends on the flue gas density

A

Admin • 833K Points
Coach

Q. Which is the most thermally efficient furnace?

  • (A) Reheating furnace
  • (B) Reverberatory furnace
  • (C) Rotary kilns
  • (D) Boiler furnace

A

Admin • 833K Points
Coach

Q. In a heating process, a heat flow diagram in which the quantities of heat in the various items of a heat balance are represented by the width of a band is called the

  • (A) Ostwald chart
  • (B) Cox chart
  • (C) Sankey diagram
  • (D) None of these

A

Admin • 833K Points
Coach

Q. Higher furnace temperature can not be achieved by use of a lean fuel gas in the furnace by

  • (A) Increasing the draft in the furnace
  • (B) Preheating the fuel gas
  • (C) Oxygen enrichment of combustion air
  • (D) Preheating the combustion air

A

Admin • 833K Points
Coach

Q. Neutral atmosphere is maintained in a/an __________ furnace.

  • (A) Cold rolled steel coil annealing
  • (B) Open hearth
  • (C) Soaking pit
  • (D) Walking beam reheating

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Admin • 833K Points
Coach

Q. The method of Lobo and Evans is concerned with the calculation of the

  • (A) Heat absorption in radiant section of a furnace
  • (B) Heat transfer by forced convection in a reboiler
  • (C) Heat transfer in vacuum condensers
  • (D) Mass transfer co-efficient

A

Admin • 833K Points
Coach

Q. Pulverised fuel fired furnaces employ __________ fuel firing.

  • (A) Vertical
  • (B) Tangential
  • (C) Horizontal
  • (D) All of the above

A

Admin • 833K Points
Coach

Q. Combustion of fuel in a furnace with oxygen enriched air results in higher

  • (A) Flue gas volume
  • (B) Flame temperature
  • (C) Fuel consumption
  • (D) Stack loss

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