Chemical Engineering - Chemical Engineering Basics

46. 

__________ is not a heat treatment process.

A. Cyaniding
B. Pakerising
C. Austempering
D. Martempering

Answer: Option B

Explanation:

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47. 

An ingot is hot forged to a 60% reduction in cross-section area. The percentage reduction in the volume for the above process is

A. 0
B. 60
C. 30
D. 20

Answer: Option A

Explanation:

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48. 

Volute casing of a centrifugal pump does not facilitate

A. uniform flow of fluid coming out of the impeller.
B. increase in the pump efficiency.
C. conversion of the part of the velocity head to the pressure head.
D. conversion of the part of the pressure head to velocity head.

Answer: Option D

Explanation:

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49. 

Desert air coolers being rendered ineffective in rainy season is due to

A. low humidity
B. low temperature
C. high humidity
D. sunny weather

Answer: Option C

Explanation:

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50. 

The hydraulic radius of a circular pipe of diameter 'd' flowing full is

A. d/4
B. d/2
C. 2d/3
D. d/3

Answer: Option A

Explanation:

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