Fuels And Combustion MCQ Questions & Answers

1

In flue gas analysis by Orsat's apparatus, oxygen is absorbed by

A) Potassium hydroxide B) Cuprous chloride C) Alkaline pyragllol solution D) None of these

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Answer & Solution

Answer: Option C

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2

Calorific value of pitch creosote mixture (PCM) i.e., C.T.F.-200 is about

A) 8800 kcal/m³ B) 8800 kcal/kg C) Same as that of coal middling D) 25000 kcal/kg

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Answer & Solution

Answer: Option B

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3

Pick out the wrong statement.:

A) Carburetted water gas is also called blue gas B) Coals are divided in four species according to their carbon content in Seylor's classification C) Carbonisation time in a by-product coke oven is about 16 hours D) Gross and net calorific value of a fuel is the same, if it does not contain hydrogen or hydrocarbons

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Answer & Solution

Answer: Option A

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4

Pick the odd man out.

A) Briquettes B) Wood C) Oil gas D) Pitch creosote mixture

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Answer & Solution

Answer: Option B

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5

Coke oven gas after passing through return electrostatic tar precipitator (RETP) is used for the

A) Hot scarfing of steel slabs B) Mixing with blast furnace gas C) Coke oven battery heating D) Steel ladle drying

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Answer & Solution

Answer: Option C

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6

Bunsen burner is an example of a/an __________ burner.

A) Inside mixing/premix type B) Outside mixing/diffusion flame/nozzle mix type C) Rotary cup D) Submerged combustion

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Answer & Solution

Answer: Option A

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7

Stack (chimney) height in a big thermal power plant is dictated by the

A) Pollution control aspect B) Draught to be created C) Limitation of constructional facilities D) None of these

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Answer & Solution

Answer: Option B

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8

Undercharging of coal in the by-product coke ovens results in

A) Decrease in the c.v. of coke oven gas B) Increase in its throughput C) Increase in the c.v. of coke oven gas D) No change in the c.v. of coke oven gas

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Answer & Solution

Answer: Option A

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9

Which of the following will be unsuitable for dust cleaning from flue gas at 400°C from a pulverised coal fired boiler ?

A) Multicyclones B) Bag filter C) Wet scrubber D) Hydrocyclones

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Answer & Solution

Answer: Option B

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10

With increase in calorific value of fuels, their adiabatic flame temperatures

A) Increase B) Decrease C) Remain unchanged D) May increase or decrease ; depends on the quantity of products of combustion

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Answer & Solution

Answer: Option D

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Fuels And Combustion MCQ Questions & Answers | Chemical Engineering