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Exam (elaborations)

ABYC Systems Certification Exam Review CORRECT 100%

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  • Course
  • ABYC Diesel Engine Certification
  • Institution
  • ABYC Diesel Engine Certification

Polyethylene - ANSWER What is the most often used materials for potable water systems? 1. Copper Alloys (incl. bronze, brass and nickel-copper) 2. AISI Type 300 series stainless steel 3. Glass-lined metal 4. FDA approved plastic 5. FDA approved rubber - ANSWER Name 5 materials allowable for...

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  • November 6, 2024
  • 34
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • ABYC Diesel Engine Certification
  • ABYC Diesel Engine Certification
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shantelleG
ABYC Systems Certification Exam
Review CORRECT 100%
Polyethylene - ANSWER What is the most often used materials for potable water systems?



1. Copper Alloys (incl. bronze, brass and nickel-copper)

2. AISI Type 300 series stainless steel

3. Glass-lined metal

4. FDA approved plastic

5. FDA approved rubber - ANSWER Name 5 materials allowable for contact use in potable water systems:



Siphon Break - ANSWER What device can be used to separate potable water from other water systems?



Accumulator Tank, after pump/filter and before check-valve - ANSWER What is the device used to
maintain a stable pressure and minimize pump cycling, and where should it be located?



175% - ANSWER At what what percentage of nominal working pressure shall the relief valve be set?



No, typically these are too high (up to 400% of nominal pressure) - ANSWER Is a standard household
type relief valve acceptable for hot water tanks?



nominal working pressure, not to exceed 80 PSI - ANSWER For the pressure reducing valve and check
valve installed after a shore water connection, what is the maximum allowable pressure?



overboard - ANSWER Where shall the storage tank be vented?



3 PSI or mnfg's maximum, which ever is greater. - ANSWER What is the maximum allowable pressure to
which the storage tank and vent system be subjected?

, -40 °F to +140 °F - ANSWER What temperate range is required for pumps to be able to tolerate
exposure?



257 F - ANSWER When operating at an ambient temperature of 140 F, what is the max allowable surface
temperature of a pump?



True - ANSWER Potable water systems must be equipped with a drain. T or F?



False - ANSWER Storage tank inlet may also serve as the tank vent. T or F?



True - ANSWER Storage tank inlet caps must be retained to prevent loss. T or F?



True - ANSWER Storage tanks must be equipped with a vent. T or F?



True - ANSWER Storage tank vent may be used for filling purposes. T or F?



At least 1.5X the pressure exerted by the distance from the tank bottom to the deck fill plate or vent, but
not less than 3 PSI. - ANSWER What rate of static pressure must a storage tank withstand?



3 PSI - ANSWER What is the max pressure that a desalinator can impart to a storage tank?



True - ANSWER Each desalinator must be equipped with an automatic shutoff salinity detector. T or F?



"For Cold Water Use Only" - ANSWER What marking must be on pipe or tubes that are not capable of
handling hot water?



125 PSI, 300 PSI - ANSWER What is the test pressure for water heater tank 15 gal or less? over 15 gal but
under 120 gal?

, 175 PSI - ANSWER What is the max pressure relief valve setting for hot water tanks?



210 F - ANSWER What is the max temperature relief setting for hot water tanks?



125 F - ANSWER What is the max allowable water output temperature for hot water system?



True - ANSWER All potable water system connections shall be positioned above the normal bilge water
accumulation level. T or F?



True - ANSWER Exposed metallic parts of a potable water system shall have provisions for electrical
bonding. T or F?



Improper venting - ANSWER For what reason might a holding tank collapse during pump-out?



Type I - ANSWER What type of MSD (Marine Sanitation Device) discharges effluent with fecal coliform
bacteria count <= 1,000 (per 100 ml) and no suspended solids?



Type II - ANSWER What type of MSD (Marine Sanitation Device) discharges effluent with fecal coliform
bacteria count <= 200 (per 100 ml) and <= 150 mg suspended solids per liter?



Type III - ANSWER What type of MSD (Marine Sanitation Device) is designed to hold sewage or any waste
derived from sewage?



Retention System - ANSWER What is the name given to the complete system including toilets, hoses,
pipes, holding tanks and fittings designed to receive, retain, vent and pump out sewage?



Treatment System - ANSWER What is the name of the system that includes all sanitation equipment and
fittings designed to receive, treat, vent and discharge sewage?



Siphon break - ANSWER What is another name for a vented loop that prevents back siphoning by
breaking suction yet allowing normal flow when pressurized?

, 5 - ANSWER When calculating holding tank size, how many flushes per day are included in the
calculation?



0.14 gallons - ANSWER What volume of human waste is used per flush when calculating holding tank
size?




8 lbs - ANSWER What is the approximate weight of a gallon of sewage?



2X weight of tank and contents when full - ANSWER What safety factor shall be utilized when
determining necessary restraining forces for installation of a holding tank?



neoprene, bonded to tank surface with non-hydroscopic adhesive. - ANSWER What material is
recommended to be used to prevent chafe between metallic tanks and tank supports, bracing, etc?



Similar coefficient of thermal expansion - helps prevent leaks. - ANSWER Why is it recommended to use
plastic fittings with plastic holding tanks?



1.5 inch, internal national pipe thread (NPT) - liquid and vapor tight. - ANSWER What type of fitting shall
be used for deck pump-out?



True - ANSWER True or False: holding tank vent line shall have a constant rise from the top of the tank to
the vent fitting and be as short as possible.



True - ANSWER Only anaerobic bacterial produce a smell. T or F?



24 inches - ANSWER What is the minimal distance allowed between a holding tank vent fitting and any
opening into an accommodation space?



True. Maceration does not reduce bacteria content. - ANSWER A macerator pump is not a Type I, II, or III
MSD.

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