HVAC Electric Review 2 Test Questions with Correct Solutions, A+

Resistance is? - Opposition to current flow An electron has? - A negative charge Impedance is? - Opposition to alternating current flow Current flow is? - Electron flow in a circuit The safety ground conductor is usually color coded? - Green or bare. Like charges? - Repel each other The symbol for current is? - I Any material that will readily release electrons is called? - A conductor Which of the following materials would be best suited for use as a semi-conductor? - Silicon How many watts of power are used by a heater operating at 240 volts and drawing 5 amps? - 1200 watts 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 would be the result, if a 24 volt, 20-ohm low voltage contractor coil were wired in series with a 24 volt, 200-0hm control relay coil? - Only the control relay would operate.