Exam (elaborations)
ABYC Marine Systems Certification.
- Institution
- 11 Body Systems (Anatomy & Physiology
ABYC Marine Systems Certification.
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ABYC Marine Systems CertificationWhich components may need to be by-passed for decommissioning? - correct
answer-*Tanks, filters, water heaters. They can be drained and cleaned separately,
saving money on antifreeze
Which agency should be referenced when selecting materials for potable water
systems? - correct answer-FDA
Biologically contaminated potable-water systems should be disinfected with a
mixture of chlorine and have a strength of at least: - correct answer-100 ppm
Contamination of the potable water system with ethylene glycol may be explained
by: - correct answer-*Leaking heat exchanger on a water heater.
What is the ABYC standard referencing potable water? - correct answer-H-23
What component is intended to maintain a stable pressure within a potable water
system and to minimize pump cycling? - correct answer-Accumulator tank.
List components of potable water system in order from the deck fill - correct answer-*
*
Deck fill, freshwater tank, filter/strainer, accumulator tank, check valve, *vent, water
heater, faucets, etc.
What is the desired operating pressure within a potable water system found on board
boats? - correct answer-35-50 psi
What is the main job of a potable water system? - correct answer-To deliver drinking
water without introducing detectable taste, odor, or color.
If the potable water system includes a water heater tank, what shall be located on
the water heater? - correct answer-Pressure relief valve.
What is the first component that tends to freeze in a potable water system? - correct
answer-Faucets
What is the function of a type I or II MSD - correct answer-Treat waste to reduce
bacteria and visible solids, and discharge directly overboard. Type II is more
powerful.
What is the function of a type III MSD? - correct answer-Head connected directly to a
holding tank which can be emptied at marinas and pump-out stations.
, What is the function of a Y-valve in MSDs - correct answer-Allow waste to be
diverted and discharged directly overboard (outside 3-mile discharge limit)
What is a portable toilet? - correct answer-A fully self-contained head. Upper section
holds water for flushing. Treated water and waste are flushed to bottom each time.
May be used for several days before pump out is needed. Not permanently installed
and legal to use on all waters.
A head located below the vessel's dynamic waterline using raw water for flushing
requires a: - correct answer-*Vented loop on its intake
The result of an obstructed holding tank vent during pump-out may be: - correct
answer-Collapsed holding tank
Which sanitation pump could tun dry without damage? - correct answer-Centrifugal
pump.
A sea clock shall be securely mounted so that the assembly will withstand a ______
lb static force applied for ______ to the ______ end of the assembly without failing to
stop the ingress of water. - correct answer-500 lb, 30 seconds, inboard end.
A seacock shall be mounted in a ______ location, and installed so that it will open or
close with a _____ degree turn. - correct answer-Readily accessible, 90 degree.
Why is a ball-valve connected to a thru-hull fitting not an ABYC approved
installation? - correct answer-Incompatible threads, will not pass structural stress
test, lack of base flange to distribute the load.
What type of threads do seacocks have? - correct answer-Straight threads.
What is gray water? - correct answer-Wastewater from showers, sinks, dishwashers,
and tubs
Per ABYC TH-22, sink and shower drains should contain a ______ to stop the
ingress of carbon monoxide. - correct answer-P-trap
Ethylene glycol or propylene glycol, which one would kill you to drink? - correct
answer-Ethylene glycol.
What is the lifespan of marine sanitation hoses? - correct answer-*10 years.
Inspected annually.
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