Fluid Mechanics

Question 1

what is a stagnation point in pitot tubes?

Accepted Answer

a point at which velocity = 0

Question 2

how do you find velocity/area/flow/etc when the pipe isn't full?

Accepted Answer

use the partial flow graph

Question 3

if y<yc then flow is what?

Accepted Answer

supercritical

Question 4

what do hydraulic jumps represent?

Accepted Answer

conservation of momentum when water transitions from supercritical to subcritical flow

Question 5

when tailwater normal depth is less than conjugate depth of hydraulic jump, does the jump move upstream or downstream?

Accepted Answer

downstream

Question 6

when pumps are in parallel, what happens to pressure and flow?

Accepted Answer

pressure stays constant and flow increases

Question 7

when pumps are in series, what happens to pressure and flow?

Accepted Answer

pressure increases and flow stays constant

Question 8

NPSH available must be greater than what to prevent cavitation?

Accepted Answer

NPSH required by manufacturer

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