ABYC SYSTEMS CERTIFICATION EXAM
REVIEW EXAM WITH CORRECT
QUESTIONS AND ANSWERS
What is the most often used materials for potable water systems? - CORRECT-
ANSWERS********Polyethylene
Name 5 materials allowable for contact use in potable water systems: - CORRECT-
ANSWERS********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? - CORRECT-
ANSWERS********Siphon Break
What is the device used to maintain a stable pressure and minimize pump cycling, and where
should it be located? - CORRECT-ANSWERS********Accumulator Tank, after pump/filter and
before check-valve
,At what what percentage of nominal working pressure shall the relief valve be set? - CORRECT-
ANSWERS********175%
Is a standard household type relief valve acceptable for hot water tanks? - CORRECT-
ANSWERS********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? - CORRECT-ANSWERS********nominal working pressure,
not to exceed 80 PSI
Where shall the storage tank be vented? - CORRECT-ANSWERS********overboard
What is the maximum allowable pressure to which the storage tank and vent system be
subjected? - CORRECT-ANSWERS********3 PSI or mnfg's maximum, which ever is greater.
What temperate range is required for pumps to be able to tolerate exposure? - CORRECT-
ANSWERS********-40 °F to +140 °F
When operating at an ambient temperature of 140 F, what is the max allowable surface
temperature of a pump? - CORRECT-ANSWERS********257 F
Potable water systems must be equipped with a drain. T or F? - CORRECT-
ANSWERS********True
Storage tank inlet may also serve as the tank vent. T or F? - CORRECT-ANSWERS********False
,Storage tank inlet caps must be retained to prevent loss. T or F? - CORRECT-
ANSWERS********True
Storage tanks must be equipped with a vent. T or F? - CORRECT-ANSWERS********True
Storage tank vent may be used for filling purposes. T or F? - CORRECT-ANSWERS********True
What rate of static pressure must a storage tank withstand? - CORRECT-ANSWERS********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? - CORRECT-
ANSWERS********3 PSI
Each desalinator must be equipped with an automatic shutoff salinity detector. T or F? -
CORRECT-ANSWERS********True
What marking must be on pipe or tubes that are not capable of handling hot water? - CORRECT-
ANSWERS********"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? -
CORRECT-ANSWERS********125 PSI, 300 PSI
What is the max pressure relief valve setting for hot water tanks? - CORRECT-
ANSWERS********175 PSI
, What is the max temperature relief setting for hot water tanks? - CORRECT-
ANSWERS********210 F
What is the max allowable water output temperature for hot water system? - CORRECT-
ANSWERS********125 F
All potable water system connections shall be positioned above the normal bilge water
accumulation level. T or F? - CORRECT-ANSWERS********True
Exposed metallic parts of a potable water system shall have provisions for electrical bonding. T
or F? - CORRECT-ANSWERS********True
For what reason might a holding tank collapse during pump-out? - CORRECT-
ANSWERS********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? - CORRECT-ANSWERS********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? - CORRECT-
ANSWERS********Type II
What type of MSD (Marine Sanitation Device) is designed to hold sewage or any waste derived
from sewage? - CORRECT-ANSWERS********Type III
REVIEW EXAM WITH CORRECT
QUESTIONS AND ANSWERS
What is the most often used materials for potable water systems? - CORRECT-
ANSWERS********Polyethylene
Name 5 materials allowable for contact use in potable water systems: - CORRECT-
ANSWERS********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? - CORRECT-
ANSWERS********Siphon Break
What is the device used to maintain a stable pressure and minimize pump cycling, and where
should it be located? - CORRECT-ANSWERS********Accumulator Tank, after pump/filter and
before check-valve
,At what what percentage of nominal working pressure shall the relief valve be set? - CORRECT-
ANSWERS********175%
Is a standard household type relief valve acceptable for hot water tanks? - CORRECT-
ANSWERS********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? - CORRECT-ANSWERS********nominal working pressure,
not to exceed 80 PSI
Where shall the storage tank be vented? - CORRECT-ANSWERS********overboard
What is the maximum allowable pressure to which the storage tank and vent system be
subjected? - CORRECT-ANSWERS********3 PSI or mnfg's maximum, which ever is greater.
What temperate range is required for pumps to be able to tolerate exposure? - CORRECT-
ANSWERS********-40 °F to +140 °F
When operating at an ambient temperature of 140 F, what is the max allowable surface
temperature of a pump? - CORRECT-ANSWERS********257 F
Potable water systems must be equipped with a drain. T or F? - CORRECT-
ANSWERS********True
Storage tank inlet may also serve as the tank vent. T or F? - CORRECT-ANSWERS********False
,Storage tank inlet caps must be retained to prevent loss. T or F? - CORRECT-
ANSWERS********True
Storage tanks must be equipped with a vent. T or F? - CORRECT-ANSWERS********True
Storage tank vent may be used for filling purposes. T or F? - CORRECT-ANSWERS********True
What rate of static pressure must a storage tank withstand? - CORRECT-ANSWERS********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? - CORRECT-
ANSWERS********3 PSI
Each desalinator must be equipped with an automatic shutoff salinity detector. T or F? -
CORRECT-ANSWERS********True
What marking must be on pipe or tubes that are not capable of handling hot water? - CORRECT-
ANSWERS********"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? -
CORRECT-ANSWERS********125 PSI, 300 PSI
What is the max pressure relief valve setting for hot water tanks? - CORRECT-
ANSWERS********175 PSI
, What is the max temperature relief setting for hot water tanks? - CORRECT-
ANSWERS********210 F
What is the max allowable water output temperature for hot water system? - CORRECT-
ANSWERS********125 F
All potable water system connections shall be positioned above the normal bilge water
accumulation level. T or F? - CORRECT-ANSWERS********True
Exposed metallic parts of a potable water system shall have provisions for electrical bonding. T
or F? - CORRECT-ANSWERS********True
For what reason might a holding tank collapse during pump-out? - CORRECT-
ANSWERS********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? - CORRECT-ANSWERS********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? - CORRECT-
ANSWERS********Type II
What type of MSD (Marine Sanitation Device) is designed to hold sewage or any waste derived
from sewage? - CORRECT-ANSWERS********Type III
