fresh water Flashcards
what is osmosis (1)
dilution of salt water with fresh water through filters
what is reverse osmosis (1)
filtering out salt from water
in a reverse osmosis plant what are the size of filters (2)
initial bag is 60 microns
2 blank cartridges are 10 microns
what is the ccv (2)
concentration control valves
increases or decreases flow of salt water through membrains
what are chlorines levels kept at and when are they checked (2)
checked daily kept at 0.22
who authorises and supervises the addition of cholorine (1)
section head
what are the purpose of fresh water systems (9)
laundries
galleys
showers and sinks
water heaters
medical use
bridge windo washers
fresh water hose reals
machinery cooling
gas turbine washing
what are the water tests in order
(3)
visual test
chem test
taste test
what do you use to reduce water hammer
(1)
air eliminator
what is anti scale dosing (2)
keeps membrains scale free
uses hyperspere (calgon)
what colour are fresh water and salt water hoses (2)
fresh water- blue
salt water- green
what is the name for purified water
(1)
permeate made water
what is the tds of sea water (1)
36000 ppm
what is the tds of salt water after desolation (1)
250-300 ppm
what percentage of water supplied is ejected (1)
80%
