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Fuels And Combustion MCQs | Page - 1

Dear candidates you will find MCQ questions of Fuels And Combustion here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.

Q. 1) Incomplete combustion of fuel in the furnace is judged by high __________ of the flue gases.

(A) CO content
(B) Dew point
(C) CO2 content
(D) O2 content
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Q. 2) High sulphur content in a fuel __________ of the flue gases.

(A) Decreases the dew point
(B) Increases the dew point
(C) Reduces the combustion efficiency by limiting the permissible temperature reduction
(D) Both B & C
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Q. 3) Fusion point of coal ash generally varies from 1000 to 1700°C. Ash having fusion point less than __________ °C is liable to form clinker. 

(A) 1100
(B) 1250
(C) 1350
(D) 1400
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Q. 4) Coal tar fuel - 200 (CTF 200) is a mixture of

(A) Pitch and creosote oil
(B) Light oil and pitch
(C) Anthracene and crecosote oil
(D) Solar oil and pitch
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Q. 5) Kopper-Totzek coal gasifier (installed in a coal based nitrogeneous fertiliser plant) employs a/an __________ bed gasifier.

(A) Fluidised
(B) Fixed
(C) Moving
(D) Entrained
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Q. 6) During combustion of coal on grate, clinker formation is increased by the

(A) Use of thick fire bed
(B) Low fusion point of ash (< 1100°C)
(C) Use of preheated primary air
(D) All of the above
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Q. 7) A good quality coal should have

(A) Low fusion point of ash
(B) High ash content
(C) High sulphur
(D) None of these
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Q. 8) Coke oven gas is stripped of its H2 S 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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Q. 9) Which of the following has the highest flame speed?

(A) CO
(B) H2
(C) CH4
(D) C2 H6
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Q. 10) A good coking coal should have high __________ content.

(A) Ash
(B) Sulphur & phosphorus
(C) Moisture
(D) None of these
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