Chemical Engineering MCQs

6108 MCQs  (Page 489 of 611)

Attempt Chemical Engineering Quiz
Which of the following is not a directly fired furnace ?
A. By-product coke oven
B. Calcination kiln
C. Sintering furnace
D. Open hearth furnace
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Thermal efficiency of an open hearth furnace may be about _____________ percent?
A. 5
B. 20
C. 50
D. 80
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The electric furnace in which heat is produced by a combination of induced current and skin effect is called _____________ furnace?
A. Arc
B. Resistance
C. Low frequency induction
D. High frequency induction
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Which of the following is the most suitable for preheating combustion air above 650°C ?
A. Regenerator
B. Metallic recuperator
C. Ceramic recuperator
D. None of these
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Artificial draught produced by a fan in the furnace can be controlled by the___________________?
A. Speed of the fan
B. Damper
C. Variation in the pitch of fan blades
D. All a., b. and c.
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Protective gas used in the annealing furnace for steel coil comprises of__________________?
A. 95% n2 + 5% h2
B. 5% h2 + 9% n2
C. 100% co
D. 100% h2
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Acid dew point temperature (ADT) of a flue gas produced by the combustion of a fuel containing 1% sulphur may be about ____________ °C?
A. 80
B. 130
C. 180
D. 250
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Reheating furnace (pusher type) is used for heating_____________________?
A. Ingots
B. Slabs
C. Steel coils
D. Steel sheets
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Shaft furnaces are used for_______________________?
A. Smelting
B. Calcining
C. Roasting
D. All a., b. and c.
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Regenerators are installed in_______________?
A. Coke ovens
B. Open hearth furnace
C. Both a. & b.
D. Neither a. nor b.
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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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