ABYC AIR CONDITIONING AND
REFRIGERATION CERTIFICATION FINAL PAPER
2026 QUESTIONS WITH FULL SOLUTION
GRADED A+
◉ 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?
REFRIGERATION CERTIFICATION FINAL PAPER
2026 QUESTIONS WITH FULL SOLUTION
GRADED A+
◉ 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?
