Fuels and Combustion MCQs

469 MCQs  — Chemical Engineering MCQs  (Page 16 of 47)

Attempt Fuels and Combustion Quiz
Natural draft created by the chimney depends upon _____________________?
A. Temperature of the flue gas
B. Its height
C. Both a. & b.
D. Neither a. nor b.
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Coke oven gas constitutes mainly of ____________________?
A. H2 & co
B. H2 & ch4
C. Ch4 & co
D. H2 & co2
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Presence of nitrogen in combustion air does not reduce the ____________________?
A. Amount of heat liberated
B. Flame temperature
C. Flue gas temperature
D. Any of the above
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Coke oven gas is stripped of its H2S and mercaptans content by_________________?
A. Absorption in wash oil
B. Adsorption on bog iron bed
C. Bubbling it through dilute sulphuric acid
D. Adsorption on silica gel
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For long flame and easy ignition, the coal used should have_________________?
A. High volatile matter
B. Low ash
C. High calorific value
D. High ash
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Quantity of coke oven gas produced by high temperature carbonisation of one ton of dry coal may be around ______________ Nm3?
A. 30
B. 300
C. 3,000
D. 30,000
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The gasification reaction represented by, C + H2O = CO + H2, is__________________?
A. Exothermic
B. Endothermic
C. Catalytic
D. Autocatalytic
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The calorific value of a gas of composition CO2 = 20%, H2 = 50%, CH4 = 30%, is y. If the composition of gas is changed to H2 = 50%, CH4 = 30%, CO2 = 10%, N2 = 10%, then the calorific value will be___________________?
A. Y
B. 0.95 y
C. 1.05 y
D. 1.8 y
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C/H ratio is the minimum in case of_________________?
A. Furnace oil
B. Natural gas
C. Coal
D. Naphtha
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Which of the following is the most important deterrents to an extended use of pulverised coal in boiler firing ?
A. Ash disposal problem
B. Excessive fly-ash discharge from the stack
C. High power consumption in its transportation
D. Erosion of induced draft fan blades
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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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