$$\frac{{{{\text{L}}_{\text{e}}}}}{{\text{D}}}$$ for 90° elbow (medium radius) and 90° square elbow would be respectively around
A. 25 and 60
B. 3 and 5
C. 100 and 250
D. 250 and 600
Answer: Option A
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Width and depth of grooves in the tube sheet holes normally are __________ inch respectively.
A. $$\frac{1}{8}$$ and $$\frac{1}{{64}}$$
B. $$\frac{1}{{64}}$$ and $$\frac{1}{8}$$
C. $$\frac{1}{2}$$ and 8
D. $$\frac{1}{2}$$ and 5
A. Less than
B. 1.25-1.50 times
C. 2.5 times
D. One-fourth of
Value of Peclet number = 0, is the representative of
A. Laminar flow
B. Complete back mixing
C. Plug flow
D. Eddy diffusivity = 0
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