LESSON
PRACTICE EXERCISE
ANSWER KEY AND FEEDBACK
Item
Correct Answer and Feedback
1.
B.
Ensure the soldiers do not crank the engine for more than
15 seconds and allow 15 seconds between attempts to prevent
damage to the starter.
(page 2-2)
2.
C.
Calibrate the sodium hexametaphosphate and chlorine feed
setting at 2.6 and 60 ml per minute.
(page 2-3)
3.
A.
After 20 hours of operation, or
- Multimedia filter gauge rises above 10 paid, or
- Multimedia filter gauge rises 5 psid above initial log
reading, or
- ROWPU is shut down for more than 24 hours.
(page 2-4)
4.
C.
Mix .75 pound of citric acid with 3 gallons of brine water
for two minutes. (page 2-5)
5.
D.
The two methods to clean R.O. elements are citric acid for
salt water and surfactant for fresh water. (page 2-6)
2-11
QM4913
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