ABYC Systems Certification EXAM WITH CORRECT ACTUAL
QUESTIONS AND CORRECTLY WELL DEFINED ANSWERS LATEST
ALREADY GRADED A+ (2025/2026)
Polyethylene - CORRECT 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 - CORRECT ANSWER-Name 5 materials allowable for contact
use in potable water systems:
Siphon Break - CORRECT ANSWER-What device can be used to separate potable
water from other water systems?
Accumulator Tank, after pump/filter and before check-valve - CORRECT ANSWER-
What is the device used to maintain a stable pressure and minimize pump cycling,
and where should it be located?
,175% - CORRECT 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) - CORRECT
ANSWER-Is a standard household type relief valve acceptable for hot water tanks?
nominal working pressure, not to exceed 80 PSI - CORRECT ANSWER-For the pressure
reducing valve and check valve installed after a shore water connection, what is
the maximum allowable pressure?
overboard - CORRECT ANSWER-Where shall the storage tank be vented?
3 PSI or mnfg's maximum, which ever is greater. - CORRECT ANSWER-What is the
maximum allowable pressure to which the storage tank and vent system be
subjected?
-40 °F to +140 °F - CORRECT ANSWER-What temperate range is required for pumps to
be able to tolerate exposure?
257 F - CORRECT ANSWER-When operating at an ambient temperature of 140 F, what
is the max allowable surface temperature of a pump?
True - CORRECT ANSWER-Potable water systems must be equipped with a drain. T or
F?
,False - CORRECT ANSWER-Storage tank inlet may also serve as the tank vent. T or F?
True - CORRECT ANSWER-Storage tank inlet caps must be retained to prevent loss. T
or F?
True - CORRECT ANSWER-Storage tanks must be equipped with a vent. T or F?
True - CORRECT 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. - CORRECT ANSWER-What rate of static
pressure must a storage tank withstand?
3 PSI - CORRECT ANSWER-What is the max pressure that a desalinator can impart to a
storage tank?
True - CORRECT ANSWER-Each desalinator must be equipped with an automatic
shutoff salinity detector. T or F?
"For Cold Water Use Only" - CORRECT ANSWER-What marking must be on pipe or
tubes that are not capable of handling hot water?
125 PSI, 300 PSI - CORRECT ANSWER-What is the test pressure for water heater tank
15 gal or less? over 15 gal but under 120 gal?
, 175 PSI - CORRECT ANSWER-What is the max pressure relief valve setting for hot
water tanks?
210 F - CORRECT ANSWER-What is the max temperature relief setting for hot water
tanks?
125 F - CORRECT ANSWER-What is the max allowable water output temperature for
hot water system?
True - CORRECT ANSWER-All potable water system connections shall be positioned
above the normal bilge water accumulation level. T or F?
True - CORRECT ANSWER-Exposed metallic parts of a potable water system shall have
provisions for electrical bonding. T or F?
Improper venting - CORRECT ANSWER-For what reason might a holding tank collapse
during pump-out?
Type I - CORRECT ANSWER-What type of MSD (Marine Sanitation Device) discharges
effluent with fecal coliform bacteria count <= 1,000 (per 100 ml) and no
suspended solids?
QUESTIONS AND CORRECTLY WELL DEFINED ANSWERS LATEST
ALREADY GRADED A+ (2025/2026)
Polyethylene - CORRECT 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 - CORRECT ANSWER-Name 5 materials allowable for contact
use in potable water systems:
Siphon Break - CORRECT ANSWER-What device can be used to separate potable
water from other water systems?
Accumulator Tank, after pump/filter and before check-valve - CORRECT ANSWER-
What is the device used to maintain a stable pressure and minimize pump cycling,
and where should it be located?
,175% - CORRECT 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) - CORRECT
ANSWER-Is a standard household type relief valve acceptable for hot water tanks?
nominal working pressure, not to exceed 80 PSI - CORRECT ANSWER-For the pressure
reducing valve and check valve installed after a shore water connection, what is
the maximum allowable pressure?
overboard - CORRECT ANSWER-Where shall the storage tank be vented?
3 PSI or mnfg's maximum, which ever is greater. - CORRECT ANSWER-What is the
maximum allowable pressure to which the storage tank and vent system be
subjected?
-40 °F to +140 °F - CORRECT ANSWER-What temperate range is required for pumps to
be able to tolerate exposure?
257 F - CORRECT ANSWER-When operating at an ambient temperature of 140 F, what
is the max allowable surface temperature of a pump?
True - CORRECT ANSWER-Potable water systems must be equipped with a drain. T or
F?
,False - CORRECT ANSWER-Storage tank inlet may also serve as the tank vent. T or F?
True - CORRECT ANSWER-Storage tank inlet caps must be retained to prevent loss. T
or F?
True - CORRECT ANSWER-Storage tanks must be equipped with a vent. T or F?
True - CORRECT 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. - CORRECT ANSWER-What rate of static
pressure must a storage tank withstand?
3 PSI - CORRECT ANSWER-What is the max pressure that a desalinator can impart to a
storage tank?
True - CORRECT ANSWER-Each desalinator must be equipped with an automatic
shutoff salinity detector. T or F?
"For Cold Water Use Only" - CORRECT ANSWER-What marking must be on pipe or
tubes that are not capable of handling hot water?
125 PSI, 300 PSI - CORRECT ANSWER-What is the test pressure for water heater tank
15 gal or less? over 15 gal but under 120 gal?
, 175 PSI - CORRECT ANSWER-What is the max pressure relief valve setting for hot
water tanks?
210 F - CORRECT ANSWER-What is the max temperature relief setting for hot water
tanks?
125 F - CORRECT ANSWER-What is the max allowable water output temperature for
hot water system?
True - CORRECT ANSWER-All potable water system connections shall be positioned
above the normal bilge water accumulation level. T or F?
True - CORRECT ANSWER-Exposed metallic parts of a potable water system shall have
provisions for electrical bonding. T or F?
Improper venting - CORRECT ANSWER-For what reason might a holding tank collapse
during pump-out?
Type I - CORRECT ANSWER-What type of MSD (Marine Sanitation Device) discharges
effluent with fecal coliform bacteria count <= 1,000 (per 100 ml) and no
suspended solids?
