LESSON 3
PRACTICE EXERCISE
ANSWER KEY AND FEEDBACK
Item
Correct Answer and Feedback
1.
A.
The lead pumping station must be permanently manned.
The lead pumping station must be permanently manned during
TWDS operations while the boost pumping stations operating
in the electric automatic mode require only periodic
monitoring and refueling.
(page 3-3, para 3a)
2.
C.
Three hours.
At a minimum, a crew must service each of the boost pumping
stations every three hours while the TWDS is operating.
(page 3-3, para 3a)
3.
B.
20.
Under normal conditions, the TWDS delivers water to the
suction port of each boost pumping station at a pressure of
20 psig. (page 3-6, para 4b)
4.
C.
Approximately 3 MPH.
The recommended hose-laying speed is approximately 3 MPH.
The optimum speed of any hose-laying operation varies
depending upon the terrain, available manpower, and how far
the hose must be moved between the point at which it flakes
off the truck and its final secured position.
(page 3-7, para 2b)
5.
B.
80 to 90.
The 250-cfm air compressor supplies pressurized air (80 to
90 psi), forcing the ball through the hose, displacing any
residual water. (page 3-10, para 1a)
QM4912
3-13
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