ABYC Electrical Test Questions with Correct Answers

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. A. 15 When testing for excessive EMF emission near a conductor or appliance, the tool of choice is a (n): C. Gauss meter What is the symbol for a variable resistor? variable resistor The primary problem with using a series circuit to supply multiple loads is that: A. Voltage drop through the circuit will be excessive Based on this section (Ch. 2), the most common electrical circuit problem in marine application is: C. Unwanted open The primary by-product of excessive electrical resistance is: D. Heat One horsepower equals ______________. B. 746 watts Excessive electrical resistance can be caused by ____________. D. Undersized wire, loose connections, and corrosion _________ through circuits on a boat is perhaps the most common problem with electrical circuitry. D. Resistance to electrical current flow When using Ohm's Law, if any two of the three values are known, the thrid value can be calculated by ________. A., Multiplication or division If the voltage in a circuit is 12 volts and the resistance is 3 Ohms, Ohm's Law can be used to find that the rate of flow is _______ amps. C. 4 If resistance decreases and the voltage remains constant in a circuit, then the amperage will _________. B. Increase The unit of measure for power is the __________. A. Watt A microwave oven with a wattage of 1.2 KW (1,200 watts) and a 120 VAC will draw __________ amps. D. 10 Cranking motor (engine) circuits are not required to have ___________. B. Overcurrent protection In a _______ circuit, there is only one path allowed for electrical flow. C. Series In a series circuit, the amperage (current) is ______________. A. The same everywhere it is measured In all circuits, voltage is lost as it travels through the circuit, which is commonly referred to as ___________.