Chemical Engineering - Chemical Engineering Basics

6. 

Other parameters remaining same, the recrystallisation temperature of an alloy is lowered, when

A. strain rate is increased.
B. grain size is increased.
C. prior cold deformation is increased.
D. not affected by any of the above parameters.

Answer: Option A

Explanation:

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7. 

__________ are normally subjected to sub-zero treatment.

A. Highly stressed parts
B. Gauges or precision parts
C. Cold rolled sheets
D. Non machinable materials

Answer: Option B

Explanation:

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8. 

Induced draft fans provided in large thermal power plant boilers have __________ blades.

A. forward curved
B. backward curved
C. double curved
D. radial or straight

Answer: Option B

Explanation:

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9. 

Which of the following has the highest value of refractive index ?

A. Brine (sea water)
B. Diamond
C. Distilled water
D. Glass

Answer: Option B

Explanation:

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10. 

Use of economiser in a boiler plant reduces the fuel consumption for steam generation by about __________ percent.

A. 1
B. 10
C. 30
D. 45

Answer: Option B

Explanation:

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