MEP Systems I Electrical Exam –Houston Questions And Answers With Verified Tests

______-phase AC Voltage is a combination of three alternating voltage waveforms, each displaced by 120 electrical degrees (1/3 Cycle) apart. (21-457) - Three ______-phase AC Voltage only contains one alternating voltage waveform. (21-457) - One A ____ ________ fuse can be reset after an overload and reused. (20-440) - Circuit Breaker A British Thermal Unit is the amount of heat needed to do what? (21-461) - Raise 1 pound of water 1 Fahrenheit A calorie is the amount of heat needed to do what? (21-461) - Raise 1 gram of water 1 Celsius According to Ohm's Law, if the resistance in a circuit remains constant, a change in ________ is directly proportional to a change in ______. (23-494) - Current Voltage According to Ohm's Law, if the voltage in a circuit remains constant, a change in ________ is directly proportional to a change in ______. (23-494) - Resistance Current Any time an AC Voltage is passed through a rectifier, __ Voltage is obtained. (21-456) - DC Cable and conductors should be _______ before being installed in a box. (26-559) - Stripped Can NM and NMC cable be embedded in poured concrete, concrete, or aggregate? (26-560) - No