On most commercial cargo vessels with a relatively small crew size and few users of the potable water system, how is the potable water system pressure maintained?
A
Cycling the potable water pump on and off by the action of the potable water hydro pneumatic tank pressure switch in response to system demand changes.
B
Allowing the potable water pump to run continuously against a shut-off head during periods of zero demand for potable water.
C
Allowing the potable water pump to run continuously while recirculating during periods of zero demand for potable water.
D
Cycling the potable water pump on and off by the action of potable water storage tank level switches in response to system demand changes
E
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