Electrical Mechanic/Test Technician Exam questions and 100% correct answers 2026/2027

Electrical Mechanic/Test Technician Exam questions and 100% correct answers 2026/2027 Voltage an electromotive force or potential difference expressed in volts. Potential to do work. Direct Current (DC) Electric current that flows in only one direction Alternating Current (AC) A flow of electric charge that regularly reverses its direction. Bidirectional. Wattage the electrical power consumed by a device. Coulomb the SI unit of electric charge, equal to the quantity of electricity conveyed in one second by a current of one ampere. 1 amp = 1 coulomb/sec 1 amp = 6.25 x 10 (18) Ohm unit of electrical resistance Ampere (amp) Unit that measures the strength of an electric current. Ammeter a device used to measure current in amperes. Voltmeter a device used to measure electrical potential or voltage. Wattmeter Measures electric power in watts Megger An instrument used for checking the insulation resistance on motors, feeders, bus bar systems, grounds, and branch circuit wiring. Read in millions of ohms. Oscilloscope a device used to display the shape of an electrical wave. Multimeter A measuring instrument for current, voltage, and resistance. Frequency meter Used to measure the frequency of an AC signal. micrometer A gauge which measures small distances or thicknesses. vernier caliper instrument used for measuring precise linear dimensions Wire gauge A standard measure of the diameter or thickness of a strand of wire Ohmeter a device used to measure resistance Architect's Scale A specialized ruler used in making or measuring reduced scale drawings. It is marked with a range of calibrated ratios used for laying out distances, with scales indicating feet, inches, and fractions of inches. Used on drawings other than site plans. Planimeter Engineering tool designed to measure distance as its pointer is traced around a pattern. Of the following electrical devices, the one that is NOT normally used in direct current electrical circuits is a .... A. Circuit breaker B. Double-pole switch C. Transformer D. Inverter C. Transformer Transformers do not use direct current (DC). Transformers work on alternating current (AC), which is electrical current that flows in a single direction. A transformer's principle is based on