Fuels and Combustion MCQs

469 MCQs  — Chemical Engineering MCQs  (Page 27 of 47)

Attempt Fuels and Combustion Quiz
The ratio of % total carbon obtained in the ultimate analysis of coke and % fixed carbon obtained in the proximate analysis is always ___________________?
A. 1
B. < 1
C. > 1
D. Unpredictable
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Coalification means the ___________________?
A. Process of conversion of lignite into anthracite
B. Underground gasification of coal
C. Complete combustion of coal
D. Direct hydrogenation of coal
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Washing of coal _________________?
A. Reduces its ash & sulphur content
B. Improves its coking properties
C. Increase the fusion point of its ash by removing chlorine compounds
D. All a., b. and c.
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Bituminous coal___________________?
A. Ignites less easily than anthracite
B. Is generally coking
C. Burns with smoky yellow flame
D. Both b. and c.
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Volumetric ratio of N2 to O2 in dry atmospheric air is ______________?
A. 0.21
B. 3.76
C. 4.76
D. 0.79
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_____________ prohibits the use of alcohols directly in petrol engines ?
A. Low octane number
B. High cost & availability
C. Low flash point
D. Low calorific value
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Highly reactive coke have lower ___________________?
A. Porosity
B. Coke reactivity index (cri)
C. Critical air blast (cab) value
D. Both b. and c.
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Natural draught produced by a chimney depends upon the _____________________?
A. Density of the chimney gases
B. Height of the chimney
C. Both a. and b.
D. Neither a. nor b.
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Width of the coke oven towards coke side is slightly more than that on pusher side to____________________?
A. Facilitate easy discharging of coke as it swells during carbonisation
B. Facilitate uniform heating of the oven
C. Increase the output of the coke
D. None of these
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Which of the following gaseous fuels has the highest net calorific value (kcal/Nm3) ?
A. Producer gas
B. Carburetted water gas
C. Natural gas
D. Liquefied petroleum gas
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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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