HVAC Electrical Test Verified Solutions

HVAC Electrical Test Verified Solutions Current flow is the flow of electrons in the circuit impedance is opposition to alternating current flow like charges repel each other Any material that will readily release electrons is called a conductor the symbol for current is I Which of the following materials would best be suited for use as a semi-conductor silicone the safety ground conductor is usually color coded black (or bare or green & yellow stripe) An electron has a negative charge resistance is opposition to current flow How many watts of power are used by a heater operating at 460 volts and drawing 5 amps? 2300 watts What type of meter uses its own battery? ohmmeter in electrical wiring a black colored wire usually indicates the hot conductor Fuses are sized by Volts & Amps Two 120 volt incandescent light bulbs are wired in series, one is a 60 watt bulb, the other is a 4 watt bulb. The result would be; Both bulbs light Three defrost heaters; each 15 ohms are wired in parallel to a 120 volt power supply. How many watts of power will be used? 2880 watts What is generally considered to be the maximum allowable (plus or minus) supply voltage variation? 5% Capacitors are rated in: Microfarads & Volts When testing a capacitor with an analog ohmmeter, the needle on the meter should; deflect towards zero then return to infinite reading. What is the term used to describe the output side of a transformer? Secondary side One horsepower is equal to how many watts? 746 Watts How much resistance must be placed in a 120 volt circuit in order to limit the current to 2 amps? 60 ohms A parallel circuit contains a 18 ohm and 9 ohm resistor. The total resistance equals; 6 ohms In a series circuit, the voltage drop across each resistance (load) will; Add up to equal the source voltage The total resistance of a parallel circuit will be; Less than the smallest resistance Which of the following statements about current is true? Current flow will increase wh