1. Water passes from Reservoir 1 (W.S. Elev. = 135 ft) through a turbine into Reservoir 2 (W.S.
Elev. = 100 ft).
The total energy losses are equal 1.0 V
2
/2g due to pipe friction and pipe entrance
and exit losses.
If the discharge rate is 250 ft
3
/s, what power is supplied to the turbine by the
fluid?
2. Determine the head loss in a 1000ft length of 6inch diameter glass pipe carrying 0.75 cfs of
fluid.
Kinematic viscosity = 0.0333 ft
2
/s.
Mass density = 1.5 slug/ft
3
.
3. An oil tanker has run onto rocks and cannot move.
To allow the buoyancy force to lift the
tanker off the rocks, 1 million gallons of oil must be pumped out of the tanker within a 12hour
period (the period between low and high tides).
Five hundred feet of 8in. diameter pipe is to be
used.
The vertical lift from the surface of the oil in the tanker to the pipe exit is 40 ft. The
surface of the oil in the tanker and the pipe exit are both open to the atmosphere.
How much
horsepower must be supplied to the fluid (using a pump) to meet these criteria.
The friction loss
in the pipe is 0.01 (L/D) (V
2
/2g).
Neglect other losses.
4. The head loss in a 1000ft length of 6inch diameter glass pipe is 10 ft.
Find the discharge.
Kinematic viscosity = 0.0333 ft
2
/s.
Mass density = 1.5 slug/ft
3
.
5. What pressure gradient would be required to reach a maximum point velocity of 1.0 ft/s
between two horizontal fixed plates.
The spacing between the plates is 0.02 ft.
Specific weight
= 62.4 lft/ft
3
; dynamic viscosity = 2.36 x 10
5
lbfs/ft
2
.
6. A barge is 200 ft long and 40 ft wide and is being towed at a speed of 10 ft/s through still
water.
Compute the drag force.
7. Two reservoirs are connected by a 1000m long, 0.2m diameter concrete pipe.
The difference
in reservoir elevations is 10 m.
Neglect pipe entrance and exit losses.
What percent increase in
discharge would result if this pipe were replaced with the same length and diameter of plastic
pipe.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
This is the end of the preview.
Sign up
to
access the rest of the document.
 Fall '05
 Peyton
 Shear Stress, pipe, HGL

Click to edit the document details