Furnace Technology MCQs with answers Page - 6

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A

Admin • 831.35K Points
Coach

Q. An improved and fuel efficient version of the pusher type reheating furnace is the __________ furnace.

  • (A) Walking beam
  • (B) Shaft
  • (C) Tunnel
  • (D) Rotary hearth

A

Admin • 831.35K Points
Coach

Q. Which of the following variables affects the furnace capacity?

  • (A) Temperature of flue gas
  • (B) Thermal conductivity of stock
  • (C) Thickness of heating stock
  • (D) All of the above

A

Admin • 831.35K Points
Coach

Q. Air filtration in a furnace

  • (A) Reduces its thermal efficiency
  • (B) Is indicated by flame sting out
  • (C) Increases the flue gas temperature
  • (D) None of these

A

Admin • 831.35K Points
Coach

Q. In case of pulverised coal fired steam boiler, the secondary air serves the main purpose of

  • (A) Transportation of coal
  • (B) Drying of coal
  • (C) Combustion of coal by supplying it around the burner
  • (D) Preheating the primary air

A

Admin • 831.35K Points
Coach

Q. If the flame is produced under the hearth and then sweeps up into the heating chamber, this is called a/an __________ furnace.

  • (A) Sidefired
  • (B) Underfired
  • (C) Covered
  • (D) Recirculating

A

Admin • 831.35K Points
Coach

Q. Reverberatory furnace is used for

  • (A) asting/reduction of ores
  • (B) Annealing steel coil
  • (C) Heating air
  • (D) Steel melting

A

Admin • 831.35K Points
Coach

Q. Which of the following is the most important deterrants to an extended use of pulverised coal in boiler firing?

  • (A) Ash disposal problem
  • (B) Excessive fly ash discharge from the stack
  • (C) Higher power consumption in its transportation
  • (D) Erosion of induced draft fan blades

A

Admin • 831.35K Points
Coach

Q. Circulation of gases in furnace is caused by the

  • (A) Change in volume during a change of temperature
  • (B) Difference in density between hot and cold gases
  • (C) Furnace pressure in conjunction with draft in flues
  • (D) All of the above

A

Admin • 831.35K Points
Coach

Q. Metallic recuperators are not used for waste heat recovery, if the hot flue gas temperature is above __________ °C, because corrosion prevails at higher temperatures.

  • (A) 350
  • (B) 750
  • (C) 1050
  • (D) 1250

A

Admin • 831.35K Points
Coach

Q. Rate of heat release in a furnace, which is the measure of heat intensity is defined as

  • (A) kcal/hr/m3 combustion space
  • (B) kcal/m3 combustion space
  • (C) kcal/hr
  • (D) None of these

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