Chemical Engineering - Chemical Engineering Basics

26. 

'Flare tower' used in industry is meant for

A. venting off (after burning) the excess inflammable/toxic gases at high pressure.
B. absorbing the pollutant gases from the furnace exhaust.
C. cooling of furnace exhaust gases.
D. none of these.

Answer: Option A

Explanation:

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27. 

Which of the following has the highest modulus of elasticity (about 7 x 106 kg/cm2) ?

A. High speed steel
B. Stainless steel
C. Tungsten carbide
D. Superalloys

Answer: Option C

Explanation:

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28. 

Electrolytic reduction cell used for conversion of calcined Al2O3 to Al is a carbon lined furnace operating at 800-900 °C. The purpose of electric current supplied to the furnace is to

A. achieve very high purity of aluminium (99.9%).
B. keep the electrolyte in liquid condition by the generation of heat.
C. electrolytically dissociate alumina.
D. both(b) & (c).

Answer: Option D

Explanation:

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29. 

All radiations falling on a black body are

A. refracted
B. reflected
C. transmitted
D. absorbed

Answer: Option D

Explanation:

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30. 

Styrofoam is the commercial name of

A. polyurathene
B. polystyrene
C. polyacrylonitrile
D. polybutadiene

Answer: Option B

Explanation:

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