Chemical Engineering - Chemical Engineering Basics

21. 

Which of the following materials has the least scrap value ?

A. Aluminium
B. Stainless steel
C. Brass
D. Copper

Answer: Option B

Explanation:

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22. 

Force between the molecules of the same substance is called __________ force.

A. adhesive
B. cohesive
C. molecular
D. Vander Walls

Answer: Option B

Explanation:

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23. 

Stresses encountered in the metal forming processes are less than the __________ of the material.

A. fracture strength
B. yield strength
C. elastic limit
D. limit of proportionality

Answer: Option A

Explanation:

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24. 

Which of the following is not a ferromagnetic material ?

A. Nickel
B. Cobalt
C. Aluminium
D. Iron

Answer: Option C

Explanation:

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25. 

Rain drops falling through atmospheric air attain limited terminal velocity, because of

A. upward thrust due to air.
B. viscous force exerted by air.
C. surface tension effects of water.
D. force of gravity.

Answer: Option B

Explanation:

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