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34 Cards in this Set
- Front
- Back
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The R/O elements should be cleaned whenever the temperture corrected product water output drops by __-__%.
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10
15 |
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Engineering or medical department personnel shall test for halogen residuals under these conditions:
- - - |
Before receiving potable water onboard
With each potable water sample collected for bacteriological analysis. Daily from various sampling points. As part of evaluating the treatment process, the engineering department tests chlorine or bromine residuals in potable water tanks after 30 minutes contact time |
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The following are two types of mechanical bromination systems used for the treatment of potable water:
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Automatic Proportioning Brominator
Recirculating Brominator |
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When water is taken on from a shore-side source the following agencies and authorites have guidance on approved shore-sides sites:
- - - |
United States Public Health Service
United States Navy Medical Representatives United States Government Representatives |
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Potable water with bromine levels exceeding __ milligrams per liter (mg/l) should not be ingested
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2.7
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Halogenations are more effective at _____, more acidic PH values and ______ temperatures.
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Lower
Warmer |
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The R/O elements should also be cleaned when the TDS level of the product water exceeds ___ ppm.
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500
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Do not exceed ____ PSI system pressure or ____ GPM product water flow.
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950
4.35 |
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A ______-_____ _________(coalescer) usually a two staged unit,should be sized to hold of a five micron size.
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Filter-Water Separator
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When filling the R/O high pressure pump with new lube oil, fill the pump until the sight glass is approximately ___ full.
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1/2
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Potable water systems are what NSTM chapter?
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533
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Bacterial contamination can be avoided by following one of these three procedures:
- - - |
Flush the R/O unit with non-chlorinated fresh water for 2 minutes weekly
Flush the R/O unit by operating the system for 5 minutes every 7 days Flush the R/O unit with a perservative solution every 3 months |
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Pressure as indicated on high pressure gauge should never exceed ____ PSI.
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1000
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The HP pump raises the feedwater pressure to between ___ -_____ PSI.
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800-1000
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If feedwater salt concentration decreases, the product water flow rate should not be allowed to increase more than __% above rated flow.
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20%
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Monthly, the engineering department will prepare and support the potable water quality log, Coast Guard form CG-____.
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5648
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Chlorine for shipboard and shore-side use is typically available in two forms:
- - |
Calcium Hypochlorite (Granular)
Sodium Hypochlorite (Liquid Bleach) |
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What safety requirements apply when handling bromine:
- - - - |
Skin Protection
Eye Protection Respiratory Protection Ventilation |
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Engineering departments shall maintain a ___ year chronological record of potable water monitoring.
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two
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_____ ____________ procedures use over the counter bleach products as the source for sodium hypochlorite.
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Batch Chlorination
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Water temperature affects the amount of bromine a bromine cartridge releases, ______ temperatures may deplete the cartridge more _______.
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Warmer
Rapidly |
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For free chlorine, place the prepared sample cell in the cell holder within ___ minute after adding the DPD free pillow.
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One
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What is the minimum amount FAC or TBR to be maintained?
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0.2 ppm
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The FAC and TBR are measured amounts of halogen redidual contained throughout the potable water system after a __ minute contact period.
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30
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What is FAC and TBR stand for?
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Free Available Chlorine
Total Bromine Residual |
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The high pressure switch shuts down the compressor when the pressure rises above __ BAR.
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25
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The after blow function keeps the fan running for approximately __ minutes after the system has been stopped in any mode of operation
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10
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Use of non-approved cartridges will ____ the R/O unit _______.
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Void
Warranty |
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The PW400 uses a single ____ micron, 30FT2 filter. Filters can be washed and re-used _-_ times.
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Five
2-3 |
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Always flush the unit with ___-________ _____ water only.
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Non-Chlorinated Fresh
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Failure to open the ____ ________ ________ valve can result in hydralic shock to the system.
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High Pressure Bypass
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Typical sea water contains about __% salinity where in a bay, it is about __%.
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33
20 |
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The R/O unit will produce permeate(product water) with a quality pf <____ ppm TDS in accordance with WHO standards for drinking water.
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500
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_______ and ________ are the two halogen disinfectants approved for use in CG systems.
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Bromine
Chlorine |
