Fuels and Combustion MCQs

469 MCQs  — Chemical Engineering MCQs  (Page 20 of 47)

Attempt Fuels and Combustion Quiz
Which of the following has the highest flame speed ?
A. Co
B. H2
C. Ch4
D. C2h6
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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
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Presence of ______________ in a dry gaseous fuel does not contribute to its calorific value?
A. Sulphur
B. Oxygen
C. Hydrogen
D. Carbon
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Ammonia content in raw coke oven gas is about _____________ gm/Nm3?
A. 1
B. 5
C. 50
D. 100
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The maximum adiabatic flame temperature in air as compared to that in pure oxygen is_______________?
A. Much lower
B. Much higher
C. Same
D. Either lower or higher, depends on the type of fuel
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Calorific value of wood gas is about ______________ kcal/Nm3?
A. 1500
B. 3300
C. 5400
D. 8500
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Oxygen required for theoretically complete combustion of 1 Nm3 methane is ______________ Nm3?
A. 2
B. 4
C. 6
D. 1
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Ratio of primary air to secondary air increases with increase in the rank of coal, because the__________________?
A. High rank coals have higher amount of volatile matter
B. Ratio of fixed carbon to volatile matter increases
C. Oxygen content progressively decreases
D. Calorific value of the coal increases
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Coking coals are invariably____________________?
A. Lignites
B. Bituminous coals
C. Semi-anthracites
D. Anthracites
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Volatile matter content of metallurgical coke may be around ______________ percent?
A. 1-2
B. 10-15
C. 22-26
D. 30-33
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Word of the Day
23 Jul
Aisle
a passage between rows of seats in a building such as a church or theatre, an aircraft, or train.
طویل تنگ راستہ، نشتوں کے درمیان راستہ

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