Ballast System Flashcards
How many tanks do we have
20
How many flood valves do we have
20
How many interconnect valves do we have
18 (10 pneumatic and 8 manual)
How many deballast pumps do we have
10
How many discharge valves do we have
10
What cause the dock to sink
The weight of the water
What removes the water from the dock
Pumps
Tanks that share a bulk head can’t have no more than what difference between tanks
10 feet
What is the max differential between the tank level and the outside draft
23 feet
All pumps are powered from what
1E switch board
When on EDG power how many pumps can be run at a time
6 pumps
Which pumps move 5,626 gallons of water per minute
Pumps 3-8
Which pumps move 4,900 gallons of water per minute
1,2,9,10
What happens if the arco loses power or air pressure
We go into air lock which means we are unable to open or shut ballast system valves
In air lock what shuts and what opens
Flood valves-Shut
Interconnect valves-Shut
Discharge valves-Open
As a back up what do each pneumatic valve have
They have a flask that has enough air for 5 full valve movements
How are tank levels taken
With TLIs or by manually sounding the tank with a sounding tape
How do TLIs take readings
It takes a laser reading of tank depth and reports it to ballast control
