Chemical Engineering - Chemical Engineering Basics

26. 

The type of water filter normally employed/ preferred for treating small quantities of water in railway stations and individual industries is the __________ filter.

A. rapid sand
B. pressure
C. gravity
D. slow sand.

Answer: Option B

Explanation:

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27. 

The radioactive isotope of hydrogen is

A. deuterium
B. tritium
C. protium
D. none of these

Answer: Option B

Explanation:

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28. 

Refrigerative cooling employed during long distance transportation of food stuffs is normally done by

A. ice
B. liquid nitrogen
C. liquid oxygen
D. vacuum evaporation

Answer: Option B

Explanation:

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29. 

Internal cracks in drawn bars are due to

A. secondary tensile stresses.
B. temperature gradient in the work piece.
C. heated dies and grips.
D. internal compressive residual stress.

Answer: Option A

Explanation:

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30. 

Yield strength of a polycrystalline metal with an average grain size, d, is proportional to

A. d1/2
B. d-1/2
C. d
D. d-1

Answer: Option B

Explanation:

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