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...
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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