Chemical Engineering - Chemical Engineering Basics

36. 

Silicon crystal can be converted to p-type semi-conductor by doping with

A. phosphorous
B. nitrogen
C. carbon
D. boron

Answer: Option D

Explanation:

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37. 

Large diameter reinforced cement concrete (RCC) pipes are generally joined by __________ joint.

A. flanged iron
B. collar
C. flexible
D. expansion

Answer: Option B

Explanation:

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38. 

Increase in the entropy of a system represents the

A. degradation of energy.
B. decrease in system pressure.
C. increase in the availability of energy.
D. increase in the temperature.

Answer: Option A

Explanation:

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39. 

Property responsible for the talcum powder to cling to the skin is the

A. capillary action
B. adhesion
C. cohesion
D. surface tension

Answer: Option B

Explanation:

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40. 

__________ has a negative co-efficient of linear expansion.

A. Iron
B. Copper
C. Rubber
D. Nickel

Answer: Option B

Explanation:

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