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R

Ram Sharma • 178.09K Points
Coach

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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Ram Sharma • 178.09K Points
Coach

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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Ram Sharma • 178.09K Points
Coach

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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R

Ram Sharma • 178.09K Points
Coach

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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Ram Sharma • 178.09K Points
Coach

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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Ram Sharma • 178.09K Points
Coach

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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Ram Sharma • 178.09K Points
Coach

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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Ram Sharma • 178.09K Points
Coach

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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Ram Sharma • 178.09K Points
Coach

Q. 9) Which of the following has the highest flame speed?

(A) CO
(B) H2
(C) CH4
(D) C2 H6
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Ram Sharma • 178.09K Points
Coach

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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