ABYC Systems Certification Exam
Review Questions & Answers
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
,ABYC Systems Certification Exam
Review Questions & Answers
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.
,ABYC Systems Certification Exam
Review Questions & Answers
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
, ABYC Systems Certification Exam
Review Questions & Answers
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
Review Questions & Answers
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
,ABYC Systems Certification Exam
Review Questions & Answers
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.
,ABYC Systems Certification Exam
Review Questions & Answers
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
, ABYC Systems Certification Exam
Review Questions & Answers
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
