Chemical Engineering - Chemical Engineering Basics

6. 

Pipelines carrying various utilities in chemical industries are identified by their colour codes. The color of pipeline carrying steam is

A. black
B. silver grey
C. green
D. yellow

Answer: Option B

Explanation:

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7. 

What is the percentage of chromium in 18-4-1 high speed steel ?

A. 1
B. 4
C. 18
D. 23

Answer: Option C

Explanation:

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8. 

Preheating before welding is done to

A. make the plate softer.
B. burn oil & grease sticking to plate surfaces.
C. avoid plate distortion.
D. prevent cold cracks.

Answer: Option D

Explanation:

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9. 

Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity)

A. 1/k
B. k
C. k2
D. 1/k2

Answer: Option B

Explanation:

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10. 

Dew point temperature always gives an indication of the __________ of the moist air.

A. dryness
B. moisture content
C. coolness
D. latent heat

Answer: Option B

Explanation:

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