Fresh water Flashcards
1
Q
What is TDS?
A
- Total dissolved soilds
- It’s how water purity is measured, the lower the TDS the purer the water
2
Q
What is the TDS of sea water?
A
34,000ppm
3
Q
What is the TDS of water after desalination?
A
Between 250 & 300ppm
4
Q
What percentage of sea water is ejected?
A
80%
5
Q
What is desalinated water called?
A
Permeate or made water
6
Q
What is waste water after desalination called & what is it’s TDS?
A
- Concentrate
- 56,000ppm TDS
7
Q
What is the CCV & what does it do?
A
- Concentration control valve
- Controls the back pressure, which affects the quality of water
8
Q
What services are provided by the fresh water system?
A
- Laundry
- Galley
- showers
- machinery cooling
- water heaters
9
Q
What are the 3 tests done on water?
A
- Visual
- Taste
- Chlorine
10
Q
What are the alongside procedures for bringing on fresh water?
A
- Draw blue hoses
- Uscrew deck cap
- Fit the gooseneck
- Connect hoses to shore supply
- Open valve & flush hoses
- Do tests on water
- Shut off supply valve
- connect hoses to filling gooseneck
- dip tanks
- Open tank filling valve
- open shore supply filling
- check tank level
- take water samples
11
Q
What is the air in the fresh water system called?
A
Water hammer
12
Q
How do we reduce the effects of water hammer?
A
Fit an air eliminator at the top of the system
