electrician apprentice Exam Questions And Answers

kinetic energy - ANS Energy in motion or released potential energy potential energy - ANS stored energy due to position Example of potential energy - ANS water behind a dam Example of kinetic energy - ANS when water falls through a dam and is used to generate electricity sources of energy used to produce electricity - ANS coal, nuclear power, natural gas, oil, wind power, solar power, and water Energy is converted into - ANS motion, light, heat,sound, and visual outputs unit measurement for volt - ANS V energy efficiency ratio of power - ANS input to output Power generating plants that produce most of electricity in the U.S. - ANS coal- fired a battery has potential energy - ANS based on its chemical state Reactive power - ANS measured in VAR and its power is delivered to inductive and capacitive loads in an electrical circuit Apparent power - ANS measured in VA and is the calculated product of voltage and current in a circuit without regard to the phase shift a compressed spring has potential energy due to its - ANS physical condition a 3 MV wind turbine costs about - ANS $5 million dollars electricity is produced by - ANS converting potential energy directly or indirectly into electricity difference between voltage E and volts V - ANS voltage E is amount of electrical pressure in a circuit. Volt V is the measure of voltage two sources of voltage - ANS Direct DC and alternating AC difference between DC and AC voltage - ANS DC flows in one direction. AC changes direction at regular intervals most common power sources that produce DC voltage - ANS batteries and photovoltaic cells Improper or unsafe use of electrical test instruments can result in - ANS instrument damage and personal injury the measurements made with multimeters can be indicated in - ANS digital and analog forms Ghost voltages - ANS appears when the meter is not connected to an energized circuit megohmeter - ANS voltages in the range of 50 to 5000 volts and test for insulation damage to conductors or windings ammeter - ANS measure current by measuring the strength of the magnetic field around the conductor oscillator - ANS displays an instantaneous voltage phase sequence indicator - ANS determine the phase sequence and open phases. Help protect equipment from incorrect motor rotation can be utilized to indicate that a GFCI device will function properly - ANS Plug in GFCI tester and voltage tester