ABYC Systems Certification Practice Exam

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Are Centrifugal Pumps Self-Priming or Not?Are centrifugal pumps self-priming?Did you know portable fuel tanks must withstand drops from four feet?Fully filled portable fuel tanks must not leak when dropped on a corner from what height?Discover the Best Material to Prevent Chafe in Marine EnvironmentsWhich material should be used to prevent chafe between metallic tanks and their supports?Is it permissible to operate LPG systems below freezing?Is it permissible to operate LPG systems below 0 °F?Is it true that a storage tank inlet can serve as its vent?True or False: The storage tank inlet may also serve as the tank vent.LPG vs CNG: Understanding the Energy Value and Storage DifferencesCompared to CNG, does LPG have a higher caloric value and stored at lower pressure?Three names for the check valve in diaphragm pumps you should knowWhat are three names typically ascribed to the check-valve in diaphragm pumps?Understand the Lifting Handles Safety Requirements for Portable Gas ContainersBy a factor of how many times the full weight must lifting handles of portable gas containers withstand?Understanding ABYC Standards for Fire Protection on BoatsWhich ABYC standard is best for addressing fire protection on boats?Understanding Bilge Pump Operations: Why 7 Hours MatterFor how long must a bilge pump be capable of operating while dry?Understanding Class A Fires: What You Need to KnowWhat type of fire occurs with combustible materials such as wood, cloth, and paper?Understanding Class C Fires and Their Unique HazardsWhat type of fire occurs in energized electrical equipment?Understanding Electrical Hazards Where Gasoline is Used on BoatsIn terms of electrical systems on board, what is the primary risk associated with areas where gasoline is utilized?Understanding federal regulations for holding tanks on boatsWhat do federal regulations require for all holding tanks?Understanding Fill Location in Dual Station Hydraulic Steering SystemsIn a dual station hydraulic steering system, the fill location should be:Understanding Fuel Fill Line Standards for Marine ApplicationsTrue or False: Fuel fill lines can be made from metal pipe or minimum schedule 40 plastic.Understanding Fuel Tank Safety for BoatsTrue or False: Gasoline fuel tanks may not be integrated with hull or boat structure, while diesel tanks may.Understanding How High Metal Fuel Tanks Should Be Above Flat SurfacesAccording to ABYC guidelines, how far above flat surfaces should metal fuel tanks be installed?Understanding how long a muted CO detector alarm lasts on boatsIf a CO detector alarm can be muted, how long will the mute last?Understanding Pitting Corrosion and Its ImpactsWhat type of corrosion is characterized by localized attack in pits or crevices?Understanding Reference Temperatures for Water-Cooled Air Conditioning SystemsWhat are the reference evaporation and condensing temperatures for WATER cooled air conditioning compressors?Understanding the 24-inch support spacing rule for hydraulic lines in ABYC systemsWhat is the maximum allowable distance between supports for hydraulic lines?Understanding the Best Connectors for External Conductors of Battery ChargersWhat type of connectors are allowable for external conductors of pre-wired battery chargers?Understanding the Best Fiberglass Reinforced Plastics for Marine UseOf the following types of fiberglass reinforced plastic (FRP), which is not recommended for marine applications?Understanding the Components of a Shaft Stuffing BoxA conventional shaft stuffing box may have all of the following components EXCEPT:Understanding the Distance for Electric Fuel Pumps to the EngineWhat is the maximum distance electric fuel pumps can be located from the engine?Understanding the Essential Fuel Fill Hose Clamp Width for Marine SafetyWhat is the minimal band width for fuel fill hose clamps?Understanding the Ideal Diameter for Your Fuel Vent LineWhat is the minimum inside diameter for a fuel vent line?Understanding the Impact of Battery Type on Your Electrical SystemsWhen swapping a conventional flooded cell battery with a gel cell type, which component may not need recalibration or replacement?Understanding the Importance of Dedicated Vents for LPG LockersWhat is the purpose of providing a dedicated vent for an LPG locker?Understanding the Importance of Inside Diameter in Hose MeasurementWhen measuring hose, what is the primary dimension used?Understanding the Importance of NPTF Threads in Gasoline Fuel TanksWhat standard is used for threaded connections into a gasoline fuel tank?Understanding the Importance of Proper Storage Tank VentingWhere must the storage tank be vented?Understanding the Importance of Tank Weight for Holding TanksWhat is the primary consideration when determining restraining forces for a holding tank?Understanding the Importance of Venting in Potable Water TanksVenting of potable water tanks must be carefully considered to prevent the ingress of all of the following EXCEPT:Understanding the Importance of Waste Management in No-Discharge ZonesIf both a holding tank and treatment system are installed, is it recommended to treat sewage before storing in the holding tank when in a no-discharge zone?Understanding the Limitations of Gear-Type PumpsWhat is a major downfall of gear-type (variable volume) pumps?Understanding the Maximum Allowable Ambient Temperature for Battery ChargersWhat is the maximum allowable ambient temperature for installed locations of battery chargers?Understanding the Requirements for LPG Hose ConnectionsTrue or False: Flexible LPG hose must be connected with double hose clamps on each connector.Understanding the Risks of Improper Venting in Potable Water TanksWhat is the major risk associated with improper venting of potable water tanks?Understanding the Risks of Poorly Designed Fuel Tank Vent SystemsWhat is the potential risk of poorly designed fuel tank vent systems?Understanding the Role of a Siphon Break in Potable Water SystemsWhat is the purpose of a siphon break in a potable water system?Understanding the Role of an Accumulator in a Potable Water SystemWhat is a common reason for using an accumulator in a potable water system?Understanding the Role of Flexible Hose Sections in Marine Fuel SystemsWhat is the purpose of having a flexible hose section connecting rigid metallic fuel lines to the engine?Understanding the Role of Ignition Protected Devices like Blower MotorsWhich of these is an example of an ignition protected device?Understanding the Role of Ignition Protection Ratings in Gasoline EnginesGasoline fueled engines require ignition protection ratings on all of the following, EXCEPT:Understanding the Role of Retention Systems in Sewage ManagementWhat is the purpose of a retention system in sewage management?Understanding the Standard Internal Diameter for Deck-Mount Fuel and Holding Tank Discharge HosesWhat is the typical internal diameter for deck-mount fuel and holding tank discharge hose?Understanding the Temperature Range for Safe Portable Gas TanksWhat range of temperatures must materials used in a portable gas tank withstand?Understanding the Typical Working Pressure of LP Gas After the RegulatorWhat is a typical working pressure of LP gas after the pressure regulator?Understanding Thru-Hull Fittings and Ball Valve Thread TypesTrue or False: Thru-hull fittings primarily use NPS threads while ball valve assemblies use NPT threads.Understanding Treatment Systems for Sewage in Sanitation PracticesWhat is the name of the system that includes all sanitation equipment and fittings designed to receive, treat, vent and discharge sewage?Understanding What Happens to LPG When It Is LiquefiedWhat happens to LPG when it is liquefied?Understanding When USCG Type B1-15 Can Be Used Outside the Engine CompartmentUnder what circumstance can USCG Type B1-15 be used outside of an engine compartment?Understanding Why Centrifugal Pumps Struggle with High Fluid HeadCan centrifugal pumps typically raise fluid head a large distance?What a Metal Heat Shield Does for Your Fuel FilterWhat function does a metal heat shield serve when installed with a fuel filter?What Controls Are Typically Not Found at All Helm Stations?Which control is typically NOT provided by all helm stations?What Does a Gallon of Sewage Weigh?How much does a gallon of sewage approximately weigh?What Happens to Resistance in a Motor When It Overheats?What happens to the resistance in a motor when it overheats?What Makes Up Your LPG? Understanding the EssentialsWhat is LPG primarily composed of?What matters when installing a bow thruster under ABYC guidelinesWhich of the following is NOT considered when installing a new bow thruster?What to Check When Your Engine Room Exhaust Blower Isn't Exhausting AirWhat is the likely cause if an engine room exhaust blower runs but no air is exhausted?What to Know About Check Valves and Winterizing Your Boat’s Water HeaterWhich component may have a check valve that needs to be removed during winterization?What You Need to Know About LPG Safety Distances on Your VesselWhat is the minimum allowable distance between LPG relief/overboard discharge and any opening to the cabin or hull interior?Why Inspection Openings Are Vital for Diesel Fuel Tank DesignWhat is a common feature required for an effective diesel fuel tank design?Why LPG Lockers Must Open to the Outside for Safer BoatingTrue or False: LPG lockers must be designed to open only directly to the outside atmosphere.Why proper alignment matters when installing a marine pumpFor optimal pump performance, what is crucial during installation?Why You Should Consider Electric Diaphragm Pumps for Your ProjectWhich is NOT a good reason to select an electric diaphragm type pump?Why You Should Test Your LPG System Before Every Voyage and After RepairsWhen should LPG system tests be performed?
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  • Is it true or false that a CO detector must be installed on all boats with an enclosed accommodation space?
  • According to ABYC, which of the following considerations is NOT required for evaporator condensate drains?
  • What should be considered when setting the relief valve for a water system?
  • What should be used to secure rigid PVC to minimize vibration effects in sewage systems?
  • What is the purpose of overcurrent protection in marine electrical systems?
  • Are all macerator pumps self-priming?
  • For maximum safety, fuel lines should be made of which material?
  • What is the minimal distance required between a holding tank vent fitting and any opening into an accommodation space?
  • How many appliances are allowed to be supplied from a single LPG line according to the regulations?
  • When should the output neutral of an inverter/charger be grounded?
  • What is the minimum diameter for the dedicated vent at the bottom of an LPG locker?
  • By what percentage does a start capacitor typically increase motor torque?
  • Which of the following is a true statement about the sewage treatment process?
  • Which property is essential for fuel tank materials to ensure durability in marine environments?
  • What is the function of a flapper valve in a diaphragm pump?
  • Do electrical resistance heating elements installed in air handling systems require over-temperature protection devices?
  • What special provision must be included for a sewage y-valve when the discharge seacock is not lockable?
  • When troubleshooting a fuel supply problem, which tool should be used to measure fuel pump inlet restriction?
  • What is the main factor determining the allowed voltage drop for most applications?
  • What type of fuel distribution line is allowable inside an engine compartment?
  • What is the effect of using wire sizes that are too small in a marine electrical system?
  • What is a common use for a smoke bomb in marine applications?
  • Is it permissible to have more than one wire per terminal connector?
  • Exhaust blowers on diesel boats are primarily used to:
  • Which plastic material is advisable for sewage holding tanks?
  • What must each LPG appliance contain in regard to supply lines from the cylinder locker?
  • True or False: Valves and peacocks for drawing gasoline from a fuel tank are allowed.
  • What is the designed operating temperature range for carbon monoxide detectors?
  • Which condition can lead to decreased efficiency in an HVAC system?
  • In its natural form, is LPG non-toxic and has no smell?
  • What is an essential requirement for portable water tanks constructed using composite materials?
  • In HVAC systems, what does the acronym HACR specifically refer to?
  • What is the maximum distance allowed between the main shore power disconnect circuit breaker and the shore power inlet before additional protection is needed?
  • What is the minimum hose inner diameter recommended for use on un-macerated sewage?
  • In hydraulic systems, how is proof pressure defined in relation to working pressure?
  • Which of the following is a characteristic of gel cell batteries compared to flooded cell batteries?
  • To reduce the possibility of rupture due to freezing, all A/C overboard discharge lines above the water line shall be self-draining within what distance of the hull?
  • Which component is prohibited to be fitted with liquefied gas entry in LPG systems?
  • For A/C return air ducts, should the cabin intake be mounted high or low?
  • For A/C ducts, how high should cool air output "supply" ducts be mounted in the cabin?
  • What characteristic makes flexible impeller pumps particularly suited for marine applications?
  • If a vessel has both upper and lower helm stations, how should the hydraulic systems be configured?
  • Is it true or false that a holding tank vent line must have a constant rise from the tank to the vent fitting?
  • What role does the accumulator tank play in a water system?
  • What type of LPG system line pressure is limited to a maximum of 3.5 kPa?
  • Which material is most susceptible to "crevice" corrosion?
  • If a diesel fuel filter with a plastic sight bowl is installed in an engine space, what additional feature is desirable?
  • True or False: Helm displacement refers to the amount of hydraulic fluid output per helm revolution.
  • What is the minimum distance that compartment ventilation and fuel fill/fuel vent openings should be located from each other?
  • What is the only allowable use case for a check valve in a bilge pump system?
  • What must be done to prevent the ingress of sea water into a potable water tank?
  • Hydraulic system components shall not be installed in areas where the operating temperature exceeds what degree Fahrenheit?
  • What must be installed if the fuel distribution line length from tank outlet to engine inlet exceeds 12 ft?
  • Which of the following is true regarding the fuel fill cap?
  • On a mechanical cable over sheave steering system, which factor is NOT taken into account for cable clamp attachment?
  • What type of antifreeze is recommended for use in potable water and sanitation systems for winterization?
  • "Hammering" or pulsation in a potable water system can be prevented by adding which component?
  • Are diaphragm pumps self-priming?
  • What is one requirement for materials used in portable fuel tanks?
  • What connection method is preferred for flexible hose to fittings in sewage systems?
  • What is the maximum pressure that a desalinator can impart to a storage tank?
  • What is the recommended action if a holding tank is getting full?
  • How far above the bilge water level must a battery charger be installed?
  • What are the trip level and trip time maximums for ELCIs and RCDs?
  • Which type of thread do ball valve assemblies (seacock assemblies) typically use?
  • True or False: ABYC and USCG do not require double hose clamps on thru-hull fittings, but ISO "CE" standards do.
  • What is the purpose of the conductor connecting battery charger and inverter cases back to the engine negative terminal?
  • If power is drawn from the output of a battery switch, is independent overcurrent protection required according to ABYC?
  • Can Bilge Blower motors tolerate a 10% voltage drop when sizing DC cables?
  • What electrical connection should be made to a battery charger case/chassis?
  • Are AC wire sizes determined by ampacity or voltage drop according to ABYC?
  • What might happen to OC protection on a compressor pump if the air filter is excessively dirty?
  • In which of the following applications is a gear pump most likely utilized?
  • Which component is essential if a fuel tank outlet is above the fuel distribution line level?
  • What are two special features required for an AC power transfer switch?
  • Which device is specifically designed to allow waste to be unloaded from a holding tank?
  • What two items are necessary for a pump to discharge below the waterline?
  • What specification is required for flexible air ducts in AC systems?
  • What safety measure should be taken when storing LPG cylinders?
  • The primary function of a vented loop in a plumbing system is to:
  • What should be monitored to ensure compliance with federal holding tank regulations?
  • What indicates that a battery charger is properly wired to prevent overcurrent issues?
  • A technician routing a fuel hose within an engine room should use which type of hose?
  • What type of pump is typically used for flushing a toilet?
  • Where should an accumulator tank be located in a potable water system?
  • What type of fire occurs with flammable liquids, oils, grease, and gasses?
  • What does pink discoloration on a bronze fitting indicate?
  • Where must the pressure gauge be installed in LPG systems?
  • What is a common consequence of improper routing of sewage inlet and discharge lines?
  • What is the primary function of a check valve in a diaphragm pump?
  • If a gasoline tank is made of stainless steel, what is the maximum allowable capacity according to ABYC requirements?
  • What is the maximum allowed temperature that a heat source may produce in a compartment containing LPG appliances?
  • Why is calcium buildup dangerous for a siphon break?
  • Which ABYC standard specifies minimum clean agent fire extinguisher sizes for various engine compartment sizes?
  • True or False: Each desalinator must be equipped with an automatic shutoff salinity detector.
  • How often should sewage be treated in a no-discharge zone if a treatment system is present?
  • Which of the following is necessary to prevent collapse in raw water intake hosing?
  • What is the minimal allowable distance above a flat horizontal surface for a fuel tank to be mounted?
  • 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.
  • How are wire connections regulated in marine applications?
  • What must be ensured for an electric steering system upon powering up?
  • True or False: Most GFCI's are inherently ignition protected.
  • If rigid metallic fuel lines are secured to the hull, how must they connect to the engine?
  • True or False: Impeller pumps may be damaged by running dry.
  • Which organization must approve composite materials used for the construction of portable water tanks?
  • What is the minimum distance between support clamps for refrigerant piping?
  • What ingredient should never be used to clean brass LPG fittings?
  • What should portable gas containers be capable of withstanding with regard to lifting handles?
  • Excessive heat in an engine room can lead to:
  • What is the required ratio of area to volume for a compartment to be considered "open to atmosphere"?
  • 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?
  • Do all marine power inverters need to employ an isolation transformer?
  • What type of shut-off valve is recommended for safety at engine fuel inlet over long distances?
  • What is needed in fuel systems to prevent siphoning action?
  • For tubing measurement, which dimension is primarily used?
  • Which technician statement regarding evaporator issues is correct?
  • Is it true or false that diesel machinery in protected spaces on gasoline boats must automatically shut down upon discharge of a fixed fire extinguishing system?
  • What are the two common names for the check-valve used in a diaphragm pump?
  • Is CNG considered lighter than air?
  • What is the maximum allowable output pressure from an LPG pressure regulator?
  • True or False: Condensate drain lines shall have a trap installed.
  • Is a pressure gauge a mandatory component for every LPG system?
  • According to ABYC A-24, how should a CO monitor be installed?
  • What is the minimum weight a friction-type electrical connection must withstand on the first pull?
  • What term describes the corrosion that occurs on stainless fixtures underwater due to lack of oxygen?
  • The device used to prevent raw water from siphoning into the boat is known as:
  • What condition is indicated by a visible pink color on an underwater bronze alloy fitting?
  • Are LPG and propane considered the same substance?
  • According to USCG recommendations, what should all seacocks be fitted with?
  • Is LPG lighter than air and does it rise when released?
  • Which method is not an acceptable way to separate a fresh water flushing system from a potable water system?
  • Which hose characteristic can compromise pump efficiency?
  • What is the maximum unsupported length of cable allowed for connection to batteries?
  • What is defined as "minimum retained (hydraulic) system performance"?
  • What preventive measure is essential for winterizing a water heater?
  • Electric steering must complete its full range of travel within which time period against 500 ft. lbs opposing torque?
  • How many portable (USCG Type B-1) fire extinguishers must be present on a boat that is between 26 and 40 feet in length?
  • What percentage increase in motor torque is generally provided by a start capacitor?
  • Which types of pumps can typically pass small solids?
  • What is the minimum inside diameter for a fuel fill system?
  • What is the relative size difference between AC supply and return ducts?
  • True or False: Storage tanks must be equipped with a vent.
  • True or False: It is permissible to use the grounded conductor from a fuel tank sender unit as the grounding conductor for the tank.
  • Sink drains that exit below the water line are required by ABYC to have what?
  • What is the minimum inside diameter of vent openings in the fuel tank?
  • Which type of capacitor contributes to improved energy efficiency in motors?
  • If a fuse is used for additional overcurrent protection near the shore power inlet, what must be true about its AIC?
  • Which of the following materials is FDA approved for contact use in potable systems?
  • True or False: Storage tank inlet caps must be retained to prevent loss.
  • What is an acceptable height for dropping fully filled portable fuel tanks without leaks occurring?
  • According to ABYC, must all battery chargers indicate output current status?
  • What is the minimal allowed separation between fuel tank ventilation and fuel fill openings and compartment ventilation openings?
  • Which type of pump typically requires less maintenance?
  • What type of short-circuit protection is required for battery banks with over 2200 CCA or 500 AH ratings?
  • Which component's temperature limitation is 170 °F?
  • Which material is NOT allowable for contact use in potable water systems?
  • How far from the engine exhaust system output must evaporator condensate drains terminate?
  • What might happen if a diaphragm pump is allowed to run dry?
  • Which class of devices is excluded from overcurrent protection?
  • What is the maximum allowable pressure for a pressure reducing valve and check valve installed after a shore water connection?
  • When considering the distance between supports for hydraulic lines, what is the maximum distance acceptable?
  • Must all inverters have a remote "on-line/standby" indicator located at the main AC distribution panel?
  • When and why must siphon breaks be installed in a sewage system?
  • How quickly must electric steering systems be operational after powering up?
  • What does HACR stand for in relation to electrical systems?
  • Where must LPG locker vents be led outboard?
  • Why is it advisable to use plastic fittings with plastic holding tanks?
  • Which of the following is NOT a requirement for marine fuel tank installations according to ABYC?
  • What is the load test requirement for seacock assemblies?
  • What is another name for a vented loop that prevents back siphoning by breaking suction yet allowing normal flow when pressurized?
  • True or False: If space prevents direct connection of thru-hull fittings to the hull, a single non-flexible component may be installed.
  • What is the equation for approximating flooding rate for a below-waterline hole?
  • What rate of static pressure must a storage tank withstand?
  • What precaution must be taken when installing a brass fitting into an aluminum fuel tank?
  • In the context of sewage treatment systems, what does a type III device refer to?
  • An electric water heater rated at 1500 Watts on a 120 VAC circuit requires a minimum fuse size of:
  • What is the maximum amount of fuel that may leak before additional tests are required?
  • Is a standard household-type relief valve suitable for hot water tanks?
  • What should be used to ensure a secure connection for raw water intake hoses?
  • Can centrifugal pumps be damaged by running dry?
  • What is the operational ambient temperature range for LPG systems?
  • What is the minimum diameter required for a removable holding tank's vent line?
  • Which statement is true regarding the production of smell in sewage systems?
  • What should be checked when inspecting fuel hoses for safety?
  • In which three areas on a boat must electrical devices be "ignition protected"?
  • Which of the following mechanical factors affects pump efficiency?
  • True or False: It is allowable for a fuel tank to be in contact with bilge water as long as it is constructed of a corrosion-resistant material.
  • Is it true or false that boats under 26 feet may be equipped with a bucket on a lanyard instead of a Class A fire extinguisher?
  • What is a consequence of using an incorrect type of sanitation hose?
  • What type of pump is typically used for bilge pumps?
  • When selecting a fuse for a bilge blower installation, what is the most important factor to consider?
  • If a sight gauge is used on a diesel fuel tank, what must accompany the gauge?
  • Which gas is classified as LPG?
  • What is the minimum distance for installing hose clamps from the end of a fuel hose?
  • What is the potential danger of a liquid drain without an installed trap that exits above the waterline?
  • True or False: Flexible fuel fill hose may be USCG A1, A1-15, A2, B1, B1-15, or B2 standards.
  • Why is it hazardous to have a fuel tank outlet situated above the height of fuel distribution and return lines?
  • What feature must be incorporated into all raw water intake hosing?
  • What percentage of steering arm full travel must be retained in minimum retained hydraulic performance?
  • True or False: Impeller pumps are typically self-priming.
  • How many hose clamps are recommended for use on all fuel fill lines?
  • Diesel tank inspection openings must be of what minimum size and located where?
  • Which of the following is a feature of barbed hose adapters?
  • Which of the following statements about fuel tank vents is correct?
  • What is the biggest advantage of a diaphragm pump over an impeller pump?
  • If a battery charger is installed more than 7 inches away from the battery bank, what is required?
  • True or False: Potable water systems must be equipped with a drain.
  • Which of the following is NOT a type of pump typically used in marine sanitation systems?
  • A seacock may be installed instead of a siphon break to prevent discharge and back siphoning. True or False?
  • What main function does a seacock valve serve in a bilge pump system?
  • True or False: Flexible fuel vent hose inside an engine room should meet USCG Type A1, A1-15, or A2 standards.
  • What three factors must be known when sizing AC wiring?
  • Which type of pump can typically produce the highest pressures?
  • What type of device is required at the LPG manifold in systems with multiple cylinders?
  • How long should a static load test last for portable gas hose connections?
  • Should AC discharge (supply) vents be grilled with metal or wood?
  • To prevent backfilling with sewage, where should a toilet diaphragm pump be located in relation to the holding tank?
  • When calculating holding tank size, how many flushes per day are included in the calculation?
  • What is the minimum schedule for plastic and metal fuel fill pipe?
  • What is a key performance indicator for hydraulic system operations regarding pressure usage?
  • Is it acceptable for a battery charger to have exposed wiring?
  • Why is the motor "locked rotor" condition problematic for overcurrent protection?
  • Which winding typically has a higher resistance, motor start winding or run winding?
  • True or False: The storage tank vent may be used for filling purposes.
  • What thickness is recommended for holding tanks made of linear or cross-linked polyethylene?
  • What can excessive calcium buildup in marine sanitation systems lead to?
  • Which of the following is NOT a component of LPG?
  • A portable fuel tank must have a base/height ratio that won't upset if tilted to how many degrees?
  • Which type of fittings can fail due to vibration fatigue when used with metal LPG tubing?
  • How does harmonic distortion affect inverters?
  • What is the minimum inside diameter required for fuel fill hose?
  • Copper Tubing is measured primarily by which method?
  • What temperature range can pumps tolerate exposure to without damage?
  • True or False: A shut-off valve is required in gravity feed fuel systems.
  • What is the most commonly used material for potable water systems?
  • Are piston pumps self-priming?
  • Fuel tanks shall be restrained to prevent movement of more than how many inches?
  • Which of the following components must be vented in a sewage system?
  • Which of the following is the most suitable method for a water hose attachment?
  • What provision should be made when using rigid PVC for sewage systems?
  • What type of hose should a technician use for a fuel feed line in an engine room?
  • What device is used to separate potable water from other water systems?
  • True or False: Harmonic distortion of AC output waveform from some inverters may interfere with proper GFCI operation.
  • What is the primary purpose of installing a pressure gauge in an LPG system?
  • Which of the following is an acceptable material for contact use in potable water systems?
  • What function does a holding tank vent line serve?
  • What volume of human waste is used per flush when calculating holding tank size?
  • True or False: Inverters with integral AC outlets must contain an embedded GFCI.
  • What does a diaphragm pump primarily rely on to control fluid flow?
  • What marking must be on pipes or tubes that are not capable of handling hot water?
  • What issue is polyester resin known for in terms of fiberglass usage?
  • What is the purpose of a bonding conductor in relation to a fuel tank?
  • True or False: Hull penetrations without a seacock must use reinforced pipe or hose that resists kinking and collapse.
  • When is an ELCI or RCD required to be installed?
  • What is the maximum allowable pressure for a storage tank and vent system?
  • Why is a macerator pump not classified as Type I, II, or III MSD?
  • What is the consequence of carrying fuel hoses under bilge water?
  • What are the allowable distances for AC power source overcurrent protection?
  • What safety factor should be used for determining necessary restraining forces for the installation of a holding tank?
  • What is the smallest wire gauge allowed by ABYC if not sheathed or inside equipment housing?
  • The purpose of a battery switch on a boat is to:
  • Which component is most likely to not be ignition protected?
  • At what pressure should the low-side relief valve of an LPG system discharge?
  • Which of the following is NOT a potential cause of fire in a marine sanitation system?
  • Which type of anti-freeze is toxic and not allowed for cooling potable water?
  • What happens to bronze alloy fittings exposed to stray currents?
  • True or False: The end fittings for flexible LPG hose must be permanently attached.
  • Tech A states that fuel tank sending units must have a dedicated negative ground wire. Tech B claims there are exceptions. Who is correct?
  • Which factor could lead to a malfunction in a diaphragm pump for toilets?
  • What is the maximum allowable surface temperature of a pump at an ambient temperature of 140 F?
  • A Type 1 sanitation system is designed to permit which of the following?
  • What is a critical measure to take to avoid pumping efficiency loss?
  • When installing a windlass, which of the following should NOT be considered?
  • What colors should portable gasoline and diesel fuel tanks be respectively?
  • Are gear pumps self-priming?
  • Are systems using LPG cylinders designed to admit liquefied gas into other parts of the system allowed?
  • What type of pump is typically used for oil pumping?
  • What is the minimum gauge required for connecting battery charger and inverter cases back to the engine negative terminal or bus?
  • What are the reference evaporation and condensing temperatures for AIR cooled air conditioning compressors?
  • What type of material is banned for the construction of gasoline fuel tanks in marine applications?
  • What is the minimum accepted air flow (in cabin feet per minute) over the indoor coil on a heat pump (per ton)?
  • How long must there be no measurable drop in pressure when testing an installed LPG system?
  • An air conditioning condensate drain on a gasoline powered vessel should be located:
  • What is the minimum allowable pressure for a fuel tank vent system?
  • Can air conditioning systems that service engine rooms also serve accommodation spaces?
  • According to technician comments, which statement is correct regarding Carbon Monoxide monitors?
  • What is the maximum allowable pressure in a fuel tank vent system?
  • What type of pump is typically used for toilet flushing?
  • What is the primary function of a motor "run" capacitor?
  • What happens if the air filter in a compressor pump is not maintained?
  • For how long must a bilge pump be capable of continual operation at design voltage and maximal amperage?
  • At what percentage of nominal working pressure should the relief valve be set?
  • At what pressure should the LPG fuel supply line and fittings be tested?
  • When inspecting fuel hoses, which of the following is not a requirement?
  • Why must careful consideration be given to the location and routing of inlet and discharge lines for manual flush toilets?
  • What is the static load test limit for portable gas hose connections?
  • When bleeding a hydraulic system, what factors should a technician consider?
  • What type of flexible fuel fill hose is permitted inside engine compartments?
  • True or False: Pre-wired battery chargers with isolated outputs require overcurrent protection on both positive and negative outputs.
  • What is the allowable range in microns for a fuel strainer installed at the end of a pickup line inside a gasoline fuel tank?
  • What may happen to an air-conditioner starting capacitor if it is exposed to constant line voltage?
  • A high-pressure shut-down safety mechanism is required for refrigerant systems with more than how much refrigerant weight?
  • Raw water intakes are best fitted with which type of hose?
  • Which of the following is NOT one of the main categories of pump types?
  • What is the maximum pressure rating for all components of LPG systems?
  • What type of fitting shall be used for a deck pump-out to ensure liquid and vapor tightness?
  • What is the "7-40-72" rule for DC overcurrent protection?
  • True or False: Metal LPG tubing shall be connected with "long nut" type flare fittings.
  • True or False: An LPG locker is required for the storage of an unconnected (reserve) LPG cylinder.
  • What component is needed for a battery charger to effectively ground its chassis?
  • What type of overcurrent protection is needed for wires leading from an ammeter shunt in a positive DC conductor?
  • How many BTUs per hour are equivalent to 1 Watt?
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