Chemical Engineering - Chemical Engineering Basics

1. 

Fluorine is not a constituent of

A. freon
B. chloroform
C. teflon
D. fluorocarbons

Answer: Option B

Explanation:

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2. 

The most commonly used combustion system manufactured in India for the thermal power plant boilers is the __________ combustion system.

A. pulverised fuel
B. travelling grate stoker firing
C. circulating fluidised bed
D. fluidised bed

Answer: Option A

Explanation:

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3. 

During solid state sintering of powders, the following mechanism can be active.

A. Evaporation and condensation.
B. Solid state diffusion processes.
C. Liquid formation in grain boundaries.
D. Creation of more dislocations.

Answer: Option B

Explanation:

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4. 

The transition temperature at which all the ferromagnetic materials become paramagnetic materials is termed as the 'Curie temperature'. Its value for cobalt is __________ °C.

A. 768
B. 1127
C. 1359
D. 1480

Answer: Option B

Explanation:

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5. 

Regeneration of molecular seive requires it to be heated to a temperature of about __________ °C.

A. 80-120
B. 200-300
C. 600-800
D. 1000-1100

Answer: Option D

Explanation:

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