ABYC Systems Certification Exam Review questions
with verified answers
-22 °F to +158 °F Ans✓✓✓-What is the design operating temperature range for
CO detectors?
-40 °F to +140 °F Ans✓✓✓-What temperate range is required for pumps to be
able to tolerate exposure?
"For Cold Water Use Only" Ans✓✓✓-What marking must be on pipe or tubes
that are not capable of handling hot water?
> 250 PSI Ans✓✓✓-All components of LPG systems shall be rated to what
pressure?
~ 250% Ans✓✓✓-By what percentage does a start capacitor increase motor
torque?
0 °F - 140 °F Ans✓✓✓-What is the ambient temperature range for which LPG
systems must be operational?
0 °F - 140 °F Ans✓✓✓-What range of temperatures must all materials used in a
portable gas tank be capable of withstanding?
0.14 gallons Ans✓✓✓-What volume of human waste is used per flush when
calculating holding tank size?
,1 1/2 inch Ans✓✓✓-What is the minimum ID for fuel fill hose?
1 1/8 inch (note: hose ID must be greater, 1 1/2 inch) Ans✓✓✓-What is the
minimum inside diameter for a fuel fill system?
1 Bar = 14.7 PSI Ans✓✓✓-What is atmospheric pressure at sea level in bar and
PSI?
1 second or less Ans✓✓✓-How quickly must electric steering systems be
operational after powering up?
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 Ans✓✓✓-Name 5 materials allowable for contact use in
potable water systems:
1. Used inside or outside of engine room? 2. Required Insulation Temperature
Rating? 3. How many current carrying conductors will be bundled together?
Ans✓✓✓-What three factors must be known to size AC wiring?
1.5 inch, internal national pipe thread (NPT) - liquid and vapor tight. Ans✓✓✓-
What type of fitting shall be used for deck pump-out?
1.5 inches Ans✓✓✓-What is the minimum hose ID for use on un-macerated
sewage?
,1.5 inches Ans✓✓✓-What is the typical ID for deck-mount fuel and holding tank
discharge hose?
1/2 inch Ans✓✓✓-What is the minimal band width for fuel fill hose clamps?
1/2 inch ID Ans✓✓✓-LPG lockers must be vented at the bottom of the locker by a
dedicated vent with what minimum diameter?
1/4 inch Ans✓✓✓-Fuel tanks shall be restrained to prevent movement of more
than __ inche(s).
1/4 inch Ans✓✓✓-What is the minimal allowable distance above a flat horizontal
surface for a fuel tank to be mounted?
10' Ans✓✓✓-What is the maximum distance allowed between the main shore
power disconnect circuit breaker and the shore power inlet before requiring
additional OC protection?
12 Gallons Ans✓✓✓-According to ABYC, what is the maximum capacity of a
"portable" fuel tank?
12 inches (with max delivery hose length of 48 inches) Ans✓✓✓-How far away
(max) can electric fuel pumps be located from the engine?
122 F Ans✓✓✓-What is the maximum allowable ambient temperature for
installed locations of battery chargers?
, 125 F Ans✓✓✓-What is the max allowable water output temperature for hot
water system?
125 PSI, 300 PSI Ans✓✓✓-What is the test pressure for water heater tank 15 gal
or less? over 15 gal but under 120 gal?
14 in H20 (3.5 kPa or 0.5 PSI) Ans✓✓✓-What is the maximum allowable output
pressure from LPG pressure regulator?
15 inches Ans✓✓✓-What is the minimal allowed separation between fuel tank
ventilation and fuel fill openeings and compartment ventilation openings?
15 sq. in / 1 cu. ft (0.34 m^2 / m^3) Ans✓✓✓-What is the ratio (square inches :
cubic feet) of area to volume necessary for a space or compartment to be
considered "open to atmosphere"?
16 AWG Ans✓✓✓-What is the smallest wire guage allowed by ABYC (if not
sheathed or inside an equipment housing)?
170 °F Ans✓✓✓-Hydraulic system components shall not be installed in areas
where operating temperature exceeds _____ °F
175 PSI Ans✓✓✓-What is the max pressure relief valve setting for hot water
tanks?
with verified answers
-22 °F to +158 °F Ans✓✓✓-What is the design operating temperature range for
CO detectors?
-40 °F to +140 °F Ans✓✓✓-What temperate range is required for pumps to be
able to tolerate exposure?
"For Cold Water Use Only" Ans✓✓✓-What marking must be on pipe or tubes
that are not capable of handling hot water?
> 250 PSI Ans✓✓✓-All components of LPG systems shall be rated to what
pressure?
~ 250% Ans✓✓✓-By what percentage does a start capacitor increase motor
torque?
0 °F - 140 °F Ans✓✓✓-What is the ambient temperature range for which LPG
systems must be operational?
0 °F - 140 °F Ans✓✓✓-What range of temperatures must all materials used in a
portable gas tank be capable of withstanding?
0.14 gallons Ans✓✓✓-What volume of human waste is used per flush when
calculating holding tank size?
,1 1/2 inch Ans✓✓✓-What is the minimum ID for fuel fill hose?
1 1/8 inch (note: hose ID must be greater, 1 1/2 inch) Ans✓✓✓-What is the
minimum inside diameter for a fuel fill system?
1 Bar = 14.7 PSI Ans✓✓✓-What is atmospheric pressure at sea level in bar and
PSI?
1 second or less Ans✓✓✓-How quickly must electric steering systems be
operational after powering up?
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 Ans✓✓✓-Name 5 materials allowable for contact use in
potable water systems:
1. Used inside or outside of engine room? 2. Required Insulation Temperature
Rating? 3. How many current carrying conductors will be bundled together?
Ans✓✓✓-What three factors must be known to size AC wiring?
1.5 inch, internal national pipe thread (NPT) - liquid and vapor tight. Ans✓✓✓-
What type of fitting shall be used for deck pump-out?
1.5 inches Ans✓✓✓-What is the minimum hose ID for use on un-macerated
sewage?
,1.5 inches Ans✓✓✓-What is the typical ID for deck-mount fuel and holding tank
discharge hose?
1/2 inch Ans✓✓✓-What is the minimal band width for fuel fill hose clamps?
1/2 inch ID Ans✓✓✓-LPG lockers must be vented at the bottom of the locker by a
dedicated vent with what minimum diameter?
1/4 inch Ans✓✓✓-Fuel tanks shall be restrained to prevent movement of more
than __ inche(s).
1/4 inch Ans✓✓✓-What is the minimal allowable distance above a flat horizontal
surface for a fuel tank to be mounted?
10' Ans✓✓✓-What is the maximum distance allowed between the main shore
power disconnect circuit breaker and the shore power inlet before requiring
additional OC protection?
12 Gallons Ans✓✓✓-According to ABYC, what is the maximum capacity of a
"portable" fuel tank?
12 inches (with max delivery hose length of 48 inches) Ans✓✓✓-How far away
(max) can electric fuel pumps be located from the engine?
122 F Ans✓✓✓-What is the maximum allowable ambient temperature for
installed locations of battery chargers?
, 125 F Ans✓✓✓-What is the max allowable water output temperature for hot
water system?
125 PSI, 300 PSI Ans✓✓✓-What is the test pressure for water heater tank 15 gal
or less? over 15 gal but under 120 gal?
14 in H20 (3.5 kPa or 0.5 PSI) Ans✓✓✓-What is the maximum allowable output
pressure from LPG pressure regulator?
15 inches Ans✓✓✓-What is the minimal allowed separation between fuel tank
ventilation and fuel fill openeings and compartment ventilation openings?
15 sq. in / 1 cu. ft (0.34 m^2 / m^3) Ans✓✓✓-What is the ratio (square inches :
cubic feet) of area to volume necessary for a space or compartment to be
considered "open to atmosphere"?
16 AWG Ans✓✓✓-What is the smallest wire guage allowed by ABYC (if not
sheathed or inside an equipment housing)?
170 °F Ans✓✓✓-Hydraulic system components shall not be installed in areas
where operating temperature exceeds _____ °F
175 PSI Ans✓✓✓-What is the max pressure relief valve setting for hot water
tanks?
