Chemical Engineering MCQs

6108 MCQs  (Page 499 of 611)

Attempt Chemical Engineering Quiz
Fuel economy in an industrial furnace operation cannot be achieved by the use of__________________?
A. Stoichiometric combustion air
B. Non-preheated combustion air
C. Combustion air not enriched with oxygen
D. Recuperators
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Out of the following fuels used in a furnace exhausting flue gas at a temperature of 600°C, the percentage stack loss will be maximum in case of complete combustion of_________________?
A. Furnace oil with air
B. Furnace oil with oxygen
C. Blast furnace gas with air
D. Blast furnace gas with oxygen
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Which of the following is not an additive for flue gases from furnace to reduce its dewpoint ?
A. Ammonia
B. Fine dolomite
C. Alkaline powders
D. None of these
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The function of an economiser in a boiler is to preheat the _____________________?
A. Feedwater
B. Combustion air
C. Pulverised coal
D. Furnace oil
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Which of the following furnaces will have maximum thermal efficiency ?
A. Soaking pits
B. Walking beam reheating furnace
C. Boiler furnace
D. Rotary kilns
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Ostwald charts are meant for__________________?
A. Computing the excess/deficiency of combustion air
B. Calculation of flue gas temperature
C. Computation of flue gas analysis
D. None of these
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Raw materials for nitric acid manufacture are___________________?
A. Hydrogen peroxide, air and water
B. Anhydrous ammonia and air
C. Anhydrous ammonia, air and water
D. Wet ammonia, air and water
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Plant tranquillisers___________________?
A. Hold back stem growth and halt plants at a desired height
B. Cause early maturation of plants
C. Accelerate ripening of food and grain
D. Produce seedless fruit
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Nitrogen content of a nitrogenous fertiliser is 35%. It could be___________________?
A. Urea
B. Ammonium nitrate
C. Calcium ammonium nitrate (can)
D. Ammonium sulphate
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Nitrogen content of urea is about _____________ percent ?
A. 10
B. 46
C. 80
D. 94
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Word of the Day
24 Jul
Untenable
(especially of a position or view) not able to be maintained or defended against attack or objection.
ناقابل مدافعت، غیر مستحکم، جو دلیل سے ثابت نہ ہو سکے

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