Chemical Engineering - Chemical Engineering Basics

46. 

With increase in pressure, the saturation temperature of steam

A. increases rapidly first and then slowly.
B. increases slowly first and then rapidly.
C. first increases and then decreases.
D. none of these.

Answer: Option A

Explanation:

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47. 

'Sterilised zone' around a hazardous chemical industry is an area with __________ km radius around it, in which the total population/inhabitants should be less than 20000 preferably in the upwind direction.

A. 0.5
B. 5
C. 25
D. 50

Answer: Option B

Explanation:

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48. 

Pick out the wrong statement. Termination of polymerisation reaction occurs, if the

A. catalyst supply is stopped.
B. monomer supply is exhausted.
C. impurities present in monomers interfere with the chemical reaction.
D. two ends of a chain of molecules join.

Answer: Option A

Explanation:

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49. 

A thin, flat & square plate measuring 2 m x 2 m is freely hanging in ambient air at 25°C. It is exposed to the solar radiation falling on one side of the plate at the rate of 500 W/m2 . The plate temperature will remain constant at 30°C, if the convective heat transfer co-efficient is __________ W/m2 °C.

A. 50
B. 100
C. 150
D. 200

Answer: Option B

Explanation:

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50. 

The maximum value, which the residual stress in a material can reach is the __________ of the material.

A. elastic limit
B. plastic limit
C. yield stress
D. breaking stress

Answer: Option A

Explanation:

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