Chemical Engineering - Process Equipment and Plant Design

41. 

Value of Peclet number = 0, is the representative of

A. laminar flow.
B. complete back mixing.
C. plug flow.
D. eddy diffusivity = 0.

Answer: Option B

Explanation:

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42. 

Poisson's ratio of a material is the ratio of unit lateral strain to the unit axial elongation within its elastic limit. The value of Poisson's ratio for structural and pressure vessel steel may be taken as

A. 0.01
B. 0.3
C. 0.75
D. 0.95

Answer: Option B

Explanation:

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43. 

Removable connection of tubes to tube sheet is called

A. ferrule
B. socket
C. nipple
D. saddle

Answer: Option A

Explanation:

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44. 

Stress-strain diagram for low carbon steel/mild steel is shown below in the Fig.

The point 'A' on the Fig. represents the

A. breaking stress
B. ultimate stress
C. elastic limit
D. yield point

Answer: Option C

Explanation:

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45. 

Typical static submergence for bubble cap plate column operating at atmospheric pressure may be around

A. 2.5"
B. 0.5"
C. 5"
D. 50% of the plate spacing

Answer: Option B

Explanation:

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