ABYC Electrical Study 1 Questions with Complete Solutions

The reverse polarity indicator is an LED with 2 legs. One of these legs have a resistor of Correct Answer 25k Ohms Anodes used in cathodic protection systems shall be Correct Answer painted with a protective barrier coating Oil pressure and temperature gauges are Correct Answer installed in series What type of element are in series Correct Answer the switches Voltage regulator ( inbetween output and breaker) Correct Answer controls alternator field voltage Isolator transformer Correct Answer cleans signal How much is the increase in torque for the capacitor Correct Answer 250% RPM modify Correct Answer from the govner Commutator Correct Answer a slip ring that serves to reverse the direction in which an electrical current flows from the generator Armature Correct Answer the iron the coil goes on Excitation (ac alternator generators) Correct Answer on the rotor Voltage Correct Answer difference in potiental For sailboats the top of the lighting rod should be Correct Answer 6in above everything else on the mast and filed to a sharp point Independent breaker to Correct Answer activate inverter Ohm meter reads Correct Answer amps AC only Single phase Correct Answer needs netural Ground fault Correct Answer if electricity leaks from intended paths in these 2 wires ( ac hot and neutral) Battery isolator Correct Answer charge batteries with 1 alternator Galvanic isolator Correct Answer blocks bad DC currents Only at the source of power Correct Answer the neutral and ground should be connected The minimum amp circuit breaker that should be used to protect a 120v water heater circuit with a 1600-watt element would be rated at________amps. Correct Answer 15 When testing for excessive EMF emission near a conductor or appliance, the tool of choice Correct Answer gauss meter The primary problem with using a series circuit to supply multiple loads is Correct Answer voltage drop through the circuit will be excessive Based on this section, the most common electrical circuit problem in marine applications is Correct Answer unwanted open The primary by-product of excessive electrical resistance is Correct Answer heat One horsepower equals Correct Answer 746 watts Excessive electrical resistance can be caused by Correct Answer undersized wires,loose connections and corrosion Gauss meter Correct Answer helps detect sources of magnetic interference that affect electronic compasses,autopliots and others An intercircuit short circuit Correct Answer is one which unwanted conductors , such as an errant screw, completes a circuit in ways it wasn't designed to be connected Time-domain reflectometer Correct Answer can pinpoint the location of short circuts and open circuits BASED ON ABYC STANDARDS, A 1,000 WATT 120VAC WATER HEATER, WHOSE SUPPLY CABLE HAS 105C THERMAL RATING, IS RUN OUTSIDE OF THE ENGINE ROOM AND IS NOT BUNDLED WITH ANY OTHER CONDUCTORS. WHAT MINIMUM SIZE WIRE GAUGE WILL BE REQUIRED TO SERVICE THIS CIRCUIT? Correct Answer 16 gauge WHICH OF THE FOLLOWING COMPONENTS DOES NOT REQUIRE OVERCURRENT PROTECTION? Correct Answer STARTER MOTOR 1. EXCESSIVE ELECTRICAL RESISTANCE CAN BE CAUSED BY: Correct Answer UNDERSIZED WIRE, LOOSE CONNECTIONS AND CORROSION