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ABYC Marine Electrical Certification Day, Exams of Nursing

University of CambridgeNursing

A wide range of topics related to marine electrical systems, including battery charging, alternator operation, battery chargers/inverters, solar panel systems, and grounding/bonding requirements. It provides detailed information on the proper installation, maintenance, and testing of various electrical components commonly found on boats. Likely intended for marine technicians, electricians, or boat owners who need to understand the abyc (american boat & yacht council) standards and best practices for marine electrical systems. The content covers a variety of technical concepts and hands-on procedures, making it a valuable resource for those seeking to obtain abyc marine electrical certification or to enhance their knowledge of marine electrical systems.

Typology: Exams

2023/2024

Available from 07/27/2024

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ABYC Marine Electrical Certification Day
2
What is the max voltage to charge most gell cell batteries? - Answer -14.1 volts
Range of specific gravity in fully charged 12v battery? - Answer -1.260 to 1.285
Fully Charged battery is _____ volts. - Answer -12.6
Batteries create ______ gas. - Answer -Hydrogen
Two twelve volt batteries in parallel will create ________ volts - Answer -12.6 (amperage doubles)
Two 12V batteries in series creates _______ volts, but amperage remains the same - Answer -24V
This type of battery is characterized by thicker plates and is meant for moderate loads for long periods. -
Answer -Deep Cycle
This appliance is used to derive 12v from 24v system (or visa versa) and equalize batteries charge and
discharge rates. - Answer -Battery Equalizer
Battery boxes must be _______________ due to release of gasses. - Answer -vented overboard
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ABYC Marine Electrical Certification Day

What is the max voltage to charge most gell cell batteries? - Answer -14.1 volts Range of specific gravity in fully charged 12v battery? - Answer -1.260 to 1. Fully Charged battery is _____ volts. - Answer -12. Batteries create ______ gas. - Answer -Hydrogen Two twelve volt batteries in parallel will create ________ volts - Answer -12.6 (amperage doubles) Two 12V batteries in series creates _______ volts, but amperage remains the same - Answer -24V This type of battery is characterized by thicker plates and is meant for moderate loads for long periods. - Answer -Deep Cycle This appliance is used to derive 12v from 24v system (or visa versa) and equalize batteries charge and discharge rates. - Answer -Battery Equalizer Battery boxes must be _______________ due to release of gasses. - Answer -vented overboard

Over time switching solenoids tend to wear out creating an open circuit and .... - Answer -One of the batteries does not charge and goes dead. A drop in specific gravity of _____ (from the other cells) on a battery test is indicative of a bad cell. - Answer -0. Battery charger selection should be based on __________ type. - Answer -Battery Bulging battery sides and a rotten egg smell are signs of what? - Answer -Over charging Best practice to prevent corrosion on battery terminals is what? - Answer -Spray a dry film corrosion inhibitor. Wing nuts are allowed on battery terminals for wires ______ AWG and smaller. - Answer - The battery switch rating shall equal the amps of the connected overcurrent protection or the ________ whichever is less. - Answer -Feeder Cable In a flooded cell battery, fluid should be checked. - Answer -Frequently Batteries in a state of ______ can freeze and become a potential hazard [go boom]. - Answer -Discharge Circuit Breakers should be of the _______ variety. - Answer -trip free When can connections to batteries can be made with spring loaded (alligator) fasteners? - Answer - Never Batteries must be securely installed and allow no more than ______ (inches)of movement in any direction - Answer -1" True or False? Batteries may be installed directly above fuel tanks. - Answer -False

A ________ tester is often required by manufacturers to determine battery replacement - Answer - Conductance A _______ is what changes the AC power from the alternator to usable DC power. - Answer -rectifier (bridge rectifier) An AC leakage of up to _______ past the diodes of an alternators rectifier is considered normal. - Answer -0.4 V The following are part of an Alternator except __________ Stator Rotor AIC Voltage regulator Rectifier - Answer -AIC When mounting an alternator, proper consideration should be made for - Answer -•Wire Guage •Alternator RPM •Alternator voltage sensing & Cable connection •Proper belt tension/pulley alignment On a battery charger/inverter output the DC case ground should be no more than ______ Guage size less than DC current carrying conductor - Answer - Class T fuses are considered what? - Answer -Slow Blow When testing a battery charger a rise of _______ under load, from your battery baseline indicates charger is operable. - Answer -0.5 V When selecting a location to install a battery chargers/inverter consideration should be made for what?

  • Answer -■Bilge levels, water, splash

■Adequate ventilation ■Ignition Protection (where required) ■Never install over batteries Metal cased chargers/inverters must have a ________ ground at the case. - Answer -AC and DC Typical charging range of a battery is? - Answer -12.6 to 14. Battery charging systems should sense __________. - Answer -at battery. Solar panel systems need ______ to prevent back feeding. - Answer -blocking diodes Due variable outputs of up to 20V, solar panels require what? - Answer -Voltage regulator Battery banks should be discharged at no more than ____% - Answer -50% The efficiency loss through inverters is typically between ____ & ______ - Answer -5% and 15% Appropriate GFCI for inverters is determined by what? - Answer -The manufacturer The ratio for converting AC to DC is? - Answer -11 to 1 (11:1) Inverters should be chosen carefully with primary concern for what? - Answer -Output capacity On the AC output side of an investor is is important to provide isolated what? - Answer -Hot and neutral bus bars Since inverters do not provide a true sine wave best device to "see" is a DVOM with....? - Answer -true RMS (root mean square)