Fuels and Combustion MCQs with answers Page - 4

Here, you will find a collection of MCQ questions on Fuels and Combustion. Go through these questions to enhance your preparation for upcoming examinations and interviews.

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A

Admin • 802.91K Points
Coach

Q. Natural draught produced by a chimney depends upon the

  • (A) Density of the chimney gases
  • (B) Height of the chimney
  • (C) Both A & B
  • (D) Neither A nor B

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Admin • 802.91K Points
Coach

Q. Abrasion index of blast furnace coke should be around __________ percent.

  • (A) 20
  • (B) 35
  • (C) 55
  • (D) 80

A

Admin • 802.91K Points
Coach

Q. Quantity of coke produced from metallurgical coal may be around __________ percent.

  • (A) 30
  • (B) 50
  • (C) 75
  • (D) 95

A

Admin • 802.91K Points
Coach

Q. Pitch creosote mixture (PCM) as compared to furnace oil is a better fuel, because its

  • (A) Emissivity factor is higher
  • (B) Sulphur content is lower
  • (C) Flue gas has lower dew point thereby facilitating more waste heat recovery
  • (D) All of the above

A

Admin • 802.91K Points
Coach

Q. The calorific value of natural gas is about __________ kcal/Nm3.

  • (A) 10,000
  • (B) 2,500
  • (C) 25,000
  • (D) 35,000

A

Admin • 802.91K Points
Coach

Q. Calorific value of wood gas is about __________ kcal/Nm3.

  • (A) 1500
  • (B) 3300
  • (C) 5400
  • (D) 8500

A

Admin • 802.91K Points
Coach

Q. Calorific value of coke even gas produced by low temperature carbonisation of coal is about __________ kcal/Nm3.

  • (A) 2500
  • (B) 4000
  • (C) 6500
  • (D) 10000

A

Admin • 802.91K Points
Coach

Q. For maximum discharge through a chimney, its height should be

  • (A) 200 meters
  • (B) Infinitely long
  • (C) More than 105.7 metres
  • (D) Equal to the height of the hot gas column producing draught

A

Admin • 802.91K Points
Coach

Q. Fuel consumption in coke making can be reduced by

  • (A) Preheating, blending and de-ashing the coal
  • (B) Stamped charging of coal
  • (C) Dry quenching of coke
  • (D) All of the above

A

Admin • 802.91K Points
Coach

Q. Blast furnace gas compared to coke oven gas has

  • (A) Narrower limit of inflammability
  • (B) Lower ignition temperature
  • (C) Lower theoretical flame temperature
  • (D) Higher calorific value

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