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Chemical Engineering - Fluid Mechanics

Exercise : Fluid Mechanics - Section 1
26.
A particle A of diameter 10 microns settles in an oil of specific gravity 0.9 and viscosity 10 poise under Stoke's law. A particle B with diameter 20 microns settling in the same oil will have a settling velocity
same as that of A.
one fourth as that of A.
twice as that of A.
four times as that of A.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
The pitot static tube does not measure the __________ pressure.
static
total
difference in static & dynamic
all (a), (b) and (c)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
The fluid in which the shearing stress within it is proportional to the velocity gradient across the sheared section, is called a __________ fluid.
Bingham
Newtonion
perfect
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
In fluid flow, cavitation is caused, if the
fluid velocity decreases to zero.
total energy decreases.
both (a) and (b).
flow pressure approaches its vapor pressure at the prevailing temperature.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
The ratio of the depth of flow to the hydraulic radius for the most economical trapezoidal section, in open channel flow is
0.5
1
1.5
2
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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