ABYC Systems Certification Exam Review questions with verified
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detailed answers ||
What is the most often used materials for potable water systems? - ✔✔Polyethylene
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Name 5 materials allowable for contact use in potable water systems: - ✔✔1. Copper
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Alloys (incl. bronze, brass and nickel-copper)
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2. AISI Type 300 series stainless steel
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3. Glass-lined metal
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4. FDA approved plastic
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5. FDA approved rubber
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What device can be used to separate potable water from other water systems? -
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✔✔Siphon Break ||
What is the device used to maintain a stable pressure and minimize pump cycling, and
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where should it be located? - ✔✔Accumulator Tank, after pump/filter and before
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check-valve
At what what percentage of nominal working pressure shall the relief valve be set? -
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✔✔175%
Is a standard household type relief valve acceptable for hot water tanks? - ✔✔No,
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typically these are too high (up to 400% of nominal pressure)
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For the pressure reducing valve and check valve installed after a shore water
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connection, what is the maximum allowable pressure? - ✔✔nominal working pressure,
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not to exceed 80 PSI
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,Where shall the storage tank be vented? - ✔✔overboard
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What is the maximum allowable pressure to which the storage tank and vent system
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be subjected? - ✔✔3 PSI or mnfg's maximum, which ever is greater.
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What temperate range is required for pumps to be able to tolerate exposure? - ✔✔-40
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°F to +140 °F
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When operating at an ambient temperature of 140 F, what is the max allowable
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surface temperature of a pump? - ✔✔257 F
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Potable water systems must be equipped with a drain. T or F? - ✔✔True
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Storage tank inlet may also serve as the tank vent. T or F? - ✔✔False
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Storage tank inlet caps must be retained to prevent loss. T or F? - ✔✔True
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Storage tanks must be equipped with a vent. T or F? - ✔✔True
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Storage tank vent may be used for filling purposes. T or F? - ✔✔True
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What rate of static pressure must a storage tank withstand? - ✔✔At least 1.5X the
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pressure exerted by the distance from the tank bottom to the deck fill plate or vent,
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but not less than 3 PSI.
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What is the max pressure that a desalinator can impart to a storage tank? - ✔✔3 PSI
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,Each desalinator must be equipped with an automatic shutoff salinity detector. T or F?
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- ✔✔True
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What marking must be on pipe or tubes that are not capable of handling hot water? -
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✔✔"For Cold Water Use Only" || || || ||
What is the test pressure for water heater tank 15 gal or less? over 15 gal but under
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120 gal? - ✔✔125 PSI, 300 PSI
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What is the max pressure relief valve setting for hot water tanks? - ✔✔175 PSI
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What is the max temperature relief setting for hot water tanks? - ✔✔210 F
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What is the max allowable water output temperature for hot water system? - ✔✔125 F
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All potable water system connections shall be positioned above the normal bilge water
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accumulation level. T or F? - ✔✔True || || || || || ||
Exposed metallic parts of a potable water system shall have provisions for electrical
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bonding. T or F? - ✔✔True || || || || ||
For what reason might a holding tank collapse during pump-out? - ✔✔Improper
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venting
What type of MSD (Marine Sanitation Device) discharges effluent with fecal coliform
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bacteria count <= 1,000 (per 100 ml) and no suspended solids? - ✔✔Type I
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, What type of MSD (Marine Sanitation Device) discharges effluent with fecal coliform
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bacteria count <= 200 (per 100 ml) and <= 150 mg suspended solids per liter? -
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✔✔Type II ||
What type of MSD (Marine Sanitation Device) is designed to hold sewage or any waste
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derived from sewage? - ✔✔Type III
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What is the name given to the complete system including toilets, hoses, pipes, holding
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tanks and fittings designed to receive, retain, vent and pump out sewage? -
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✔✔Retention System ||
What is the name of the system that includes all sanitation equipment and fittings
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designed to receive, treat, vent and discharge sewage? - ✔✔Treatment System
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What is another name for a vented loop that prevents back siphoning by breaking
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suction yet allowing normal flow when pressurized? - ✔✔Siphon break
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When calculating holding tank size, how many flushes per day are included in the
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calculation? - ✔✔5 || ||
What volume of human waste is used per flush when calculating holding tank size? -
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✔✔0.14 gallons ||
True or False: If a portable toilet is secured and fitted with a deck pump-out fitting
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and vent it qualifies as a type III device. - ✔✔True
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Why must careful consideration be given to the location and routing of inlet and
|| || || || || || || || || || || || || ||
discharge lines for manual flush toilets when the "shut-off" merely bleeds air into the
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inlet line? - ✔✔Prevention of siphoning
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detailed answers ||
What is the most often used materials for potable water systems? - ✔✔Polyethylene
|| || || || || || || || || || || ||
Name 5 materials allowable for contact use in 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
|| || ||
What device can be used to separate potable water from other water systems? -
|| || || || || || || || || || || || || ||
✔✔Siphon Break ||
What is the device used to maintain a stable pressure and minimize pump cycling, and
|| || || || || || || || || || || || || ||
where should it be located? - ✔✔Accumulator Tank, after pump/filter and before
|| || || || || || || || || || || || ||
check-valve
At what what percentage of nominal working pressure shall the relief valve be set? -
|| || || || || || || || || || || || || || ||
✔✔175%
Is a standard household type relief valve acceptable for hot water tanks? - ✔✔No,
|| || || || || || || || || || || || || ||
typically these are too high (up to 400% of nominal pressure)
|| || || || || || || || || ||
For the pressure reducing valve and check valve installed after a shore water
|| || || || || || || || || || || || ||
connection, what is the maximum allowable pressure? - ✔✔nominal working pressure,
|| || || || || || || || || ||
not to exceed 80 PSI
|| || || || ||
,Where shall the storage tank be vented? - ✔✔overboard
|| || || || || || || ||
What is the maximum allowable pressure to which the storage tank and vent system
|| || || || || || || || || || || || || ||
be subjected? - ✔✔3 PSI or mnfg's maximum, which ever is greater.
|| || || || || || || || || || ||
What temperate range is required for pumps to be able to tolerate exposure? - ✔✔-40
|| || || || || || || || || || || || || || ||
°F to +140 °F
|| || ||
When operating at an ambient temperature of 140 F, what is the max allowable
|| || || || || || || || || || || || || ||
surface temperature of a pump? - ✔✔257 F
|| || || || || || ||
Potable water systems must be equipped with a drain. T or F? - ✔✔True
|| || || || || || || || || || || || ||
Storage tank inlet may also serve as the tank vent. T or F? - ✔✔False
|| || || || || || || || || || || || || ||
Storage tank inlet caps must be retained to prevent loss. T or F? - ✔✔True
|| || || || || || || || || || || || || ||
Storage tanks must be equipped with a vent. T or F? - ✔✔True
|| || || || || || || || || || || ||
Storage tank vent may be used for filling purposes. T or F? - ✔✔True
|| || || || || || || || || || || || ||
What rate of static pressure must a storage tank withstand? - ✔✔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.
|| || || || ||
What is the max pressure that a desalinator can impart to a storage tank? - ✔✔3 PSI
|| || || || || || || || || || || || || || || ||
,Each desalinator must be equipped with an automatic shutoff salinity detector. T or F?
|| || || || || || || || || || || || ||
- ✔✔True
|| ||
What marking must be on pipe or tubes that are not capable of handling hot water? -
|| || || || || || || || || || || || || || || || ||
✔✔"For Cold Water Use Only" || || || ||
What is the test pressure for water heater tank 15 gal or less? over 15 gal but under
|| || || || || || || || || || || || || || || || || ||
120 gal? - ✔✔125 PSI, 300 PSI
|| || || || || ||
What is the max pressure relief valve setting for hot water tanks? - ✔✔175 PSI
|| || || || || || || || || || || || || ||
What is the max temperature relief setting for hot water tanks? - ✔✔210 F
|| || || || || || || || || || || || ||
What is the max allowable water output temperature for hot water system? - ✔✔125 F
|| || || || || || || || || || || || || ||
All potable water system connections shall be positioned above the normal bilge water
|| || || || || || || || || || || || ||
accumulation level. T or F? - ✔✔True || || || || || ||
Exposed metallic parts of a potable water system shall have provisions for electrical
|| || || || || || || || || || || || ||
bonding. T or F? - ✔✔True || || || || ||
For what reason might a holding tank collapse during pump-out? - ✔✔Improper
|| || || || || || || || || || || ||
venting
What type of MSD (Marine Sanitation Device) discharges effluent with fecal coliform
|| || || || || || || || || || || ||
bacteria count <= 1,000 (per 100 ml) and no suspended solids? - ✔✔Type I
|| || || || || || || || || || || || ||
, 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 II ||
What type of MSD (Marine Sanitation Device) is designed to hold sewage or any waste
|| || || || || || || || || || || || || ||
derived from sewage? - ✔✔Type III
|| || || || || ||
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? -
|| || || || || || || || || || || || ||
✔✔Retention System ||
What is the name of the system that includes all sanitation equipment and fittings
|| || || || || || || || || || || || || ||
designed to receive, treat, vent and discharge sewage? - ✔✔Treatment System
|| || || || || || || || || ||
What is another name for a vented loop that prevents back siphoning by breaking
|| || || || || || || || || || || || || ||
suction yet allowing normal flow when pressurized? - ✔✔Siphon break
|| || || || || || || || ||
When calculating holding tank size, how many flushes per day are included in the
|| || || || || || || || || || || || || ||
calculation? - ✔✔5 || ||
What volume of human waste is used per flush when calculating holding tank size? -
|| || || || || || || || || || || || || || ||
✔✔0.14 gallons ||
True or False: If a portable toilet is secured and fitted with a deck pump-out fitting
|| || || || || || || || || || || || || || || ||
and vent it qualifies as a type III device. - ✔✔True
|| || || || || || || || || ||
Why must careful consideration be given to the location and routing of inlet and
|| || || || || || || || || || || || || ||
discharge lines for manual flush toilets when the "shut-off" merely bleeds air into the
|| || || || || || || || || || || || || ||
inlet line? - ✔✔Prevention of siphoning
|| || || || ||
