Chemical Engineering - Process Equipment and Plant Design

16.
The thermal stress in a metallic bar does not depend upon the
changes in temperature.
cross-sectional area.
both (a) and (b).
neither (a) nor (b).
Answer: Option
Explanation:
No answer description is available. Let's discuss.

17.
The minimum baffle height should be
equal to the impeller diameter.
twice the impeller diameter.
twice the tank diameter.
3/4 of the tank height.
Answer: Option
Explanation:
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18.
For turbulent flow (NRe > 2100) of low viscosity fluid (μ > 20cp) in steel pipes, the optimum inside pipe diameter is given by(where, Q = fluid flow rate, ft3/sec.ρ = fluid density, lb/ft3 μ = fluid viscosity, centipoise Di = optimum inside pipe diameter, inches)
Di, opt = 3.9 Q0.45 ρ0.13
Di, opt = 3.9 Q0.45 . μ0.95
Di, opt = 4.7 Q0.36 . μ3.2ρ0.13
Di, opt = 3 Q0.36 . μ0.88
Answer: Option
Explanation:
No answer description is available. Let's discuss.

19.
To avoid the tearing off the plate of an edge, the margin (i.e., the minimum distance from the centre of the rivet hole to the nearest edge of the plate) should be equal to
0.5 d
d
1.5 d
2.5 d
Answer: Option
Explanation:
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20.
The normal range of velocity of water in pipes is __________ m/sec.
0.1-0.5
1-2
10-50
15-30
Answer: Option
Explanation:
No answer description is available. Let's discuss.