ABYC Systems Certification Exam Review -
Questions With Proven Solutions (Pass!)
What is the most often used materials for potable water systems?
Correct Answer - Polyethylene
Name 5 materials allowable for contact use in potable water
systems: Correct Answer - 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 Answer - Siphon Break
What is the device used to maintain a stable pressure and minimize
pump cycling, and where should it be located? Correct Answer -
Accumulator Tank, after pump/filter and before check-valve
At what what percentage of nominal working pressure shall the
relief valve be set? Correct Answer - 175%
Is a standard household type relief valve acceptable for hot water
tanks? Correct Answer - 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 Answer - nominal working pressure, not to exceed 80
PSI
,Where shall the storage tank be vented? Correct Answer -
overboard
What is the maximum allowable pressure to which the storage tank
and vent system be subjected? Correct Answer - 3 PSI or
mnfg's maximum, which ever is greater.
What temperate range is required for pumps to be able to tolerate
exposure? Correct Answer - -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 Answer -
257 F
Potable water systems must be equipped with a drain. T or F?
Correct Answer - True
Storage tank inlet may also serve as the tank vent. T or F? Correct
Answer - False
Storage tank inlet caps must be retained to prevent loss. T or F?
Correct Answer - True
Storage tanks must be equipped with a vent. T or F? Correct
Answer - True
Storage tank vent may be used for filling purposes. T or F? Correct
Answer - True
What rate of static pressure must a storage tank withstand?
Correct Answer - 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 Answer - 3 PSI
Each desalinator must be equipped with an automatic shutoff
salinity detector. T or F? Correct Answer - True
What marking must be on pipe or tubes that are not capable of
handling hot water? Correct Answer - "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 Answer - 125 PSI, 300 PSI
What is the max pressure relief valve setting for hot water tanks?
Correct Answer - 175 PSI
What is the max temperature relief setting for hot water tanks?
Correct Answer - 210 F
What is the max allowable water output temperature for hot water
system? Correct Answer - 125 F
All potable water system connections shall be positioned above the
normal bilge water accumulation level. T or F? Correct Answer -
True
Exposed metallic parts of a potable water system shall have
provisions for electrical bonding. T or F? Correct Answer -
True
For what reason might a holding tank collapse during pump-out?
Correct Answer - 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 Answer - 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 Answer - Type II
What type of MSD (Marine Sanitation Device) is designed to hold
sewage or any waste derived from sewage? Correct Answer -
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? Correct Answer - Retention
System
What is the name of the system that includes all sanitation
equipment and fittings designed to receive, treat, vent and discharge
sewage? Correct Answer - Treatment System
What is another name for a vented loop that prevents back
siphoning by breaking suction yet allowing normal flow when
pressurized? Correct Answer - Siphon break
When calculating holding tank size, how many flushes per day are
included in the calculation? Correct Answer - 5
What volume of human waste is used per flush when calculating
holding tank size? Correct Answer - 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. Correct
Answer - True
Questions With Proven Solutions (Pass!)
What is the most often used materials for potable water systems?
Correct Answer - Polyethylene
Name 5 materials allowable for contact use in potable water
systems: Correct Answer - 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 Answer - Siphon Break
What is the device used to maintain a stable pressure and minimize
pump cycling, and where should it be located? Correct Answer -
Accumulator Tank, after pump/filter and before check-valve
At what what percentage of nominal working pressure shall the
relief valve be set? Correct Answer - 175%
Is a standard household type relief valve acceptable for hot water
tanks? Correct Answer - 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 Answer - nominal working pressure, not to exceed 80
PSI
,Where shall the storage tank be vented? Correct Answer -
overboard
What is the maximum allowable pressure to which the storage tank
and vent system be subjected? Correct Answer - 3 PSI or
mnfg's maximum, which ever is greater.
What temperate range is required for pumps to be able to tolerate
exposure? Correct Answer - -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 Answer -
257 F
Potable water systems must be equipped with a drain. T or F?
Correct Answer - True
Storage tank inlet may also serve as the tank vent. T or F? Correct
Answer - False
Storage tank inlet caps must be retained to prevent loss. T or F?
Correct Answer - True
Storage tanks must be equipped with a vent. T or F? Correct
Answer - True
Storage tank vent may be used for filling purposes. T or F? Correct
Answer - True
What rate of static pressure must a storage tank withstand?
Correct Answer - 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 Answer - 3 PSI
Each desalinator must be equipped with an automatic shutoff
salinity detector. T or F? Correct Answer - True
What marking must be on pipe or tubes that are not capable of
handling hot water? Correct Answer - "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 Answer - 125 PSI, 300 PSI
What is the max pressure relief valve setting for hot water tanks?
Correct Answer - 175 PSI
What is the max temperature relief setting for hot water tanks?
Correct Answer - 210 F
What is the max allowable water output temperature for hot water
system? Correct Answer - 125 F
All potable water system connections shall be positioned above the
normal bilge water accumulation level. T or F? Correct Answer -
True
Exposed metallic parts of a potable water system shall have
provisions for electrical bonding. T or F? Correct Answer -
True
For what reason might a holding tank collapse during pump-out?
Correct Answer - 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 Answer - 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 Answer - Type II
What type of MSD (Marine Sanitation Device) is designed to hold
sewage or any waste derived from sewage? Correct Answer -
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? Correct Answer - Retention
System
What is the name of the system that includes all sanitation
equipment and fittings designed to receive, treat, vent and discharge
sewage? Correct Answer - Treatment System
What is another name for a vented loop that prevents back
siphoning by breaking suction yet allowing normal flow when
pressurized? Correct Answer - Siphon break
When calculating holding tank size, how many flushes per day are
included in the calculation? Correct Answer - 5
What volume of human waste is used per flush when calculating
holding tank size? Correct Answer - 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. Correct
Answer - True
