LESSON 2
PRACTICE EXERCISE
The following items will test your knowledge of the material covered in this
lesson. There is only one correct answer for each item. When you complete
the exercise, check your answers with the answer key. If you answer any
items incorrectly, go back to the part of the lesson that contains the
information involved and study again.
1. A petroleum pipeline, with an 8-inch inside diameter is pumping crude oil
What is Reynolds number for this pumping condition?
A. 2,244.2.
B. 2,422.2.
C. 4,224.4.
D. 4,422.2.
2. You are operating a 9.7-mile-long pipeline (4-inch LWST) which supplies
an airbase with JP4. The average product temperature will be 75 degrees
Fahrenheit and the desired flow rate is 8,520 bpd. Your assistant was
tasked to compute the head loss due to friction for this situation. Thus
far, it has been determined that the 8,520 bpd was the same velocity as
5.38 ft/sec and the Reynolds number was 188,041. Your assistant is not
familiar with the Darcy-Weisbach equation and asks you for your help.
What is the total head loss due to friction in the system?
A. 1129 ft/hd.
B. 1192 ft/hd.
C. 1292 ft/hd.
D. 2192 ft/hd.
3. What is the head loss due to friction for any 1 mile of pipeline if the
flow rate in question 2 were to change to 350 gpm?
A. 214.9.
B. 241.9.
C. 291.4.
D. 412.9.
4. How far can you pump JP4 at a flow rate of 1,320 bph and a temperature of
40 degrees Fahrenheit through a pipe with an inside diameter of 7.981
inches if you have 1,150 feet of head available to overcome the friction
loss?
A. 15.5 mi.
B. 15.9 mi.
C. 19.5 mi.
D. 19.9 mi.
5. You are pumping AVGAS at a flow rate of 650 gpm and a temperature of 10
degrees Fahrenheit through a pipe with a diameter of 6 inches and a wall
thickness of 0.12. In order to pump the fuel 9 miles, how many feet of
head must you have available to overcome the friction loss?
A. 1467 ft/hd.
12-27
QM 5099
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