Alternating voltage - Study guides, Class notes & Summaries

CWB Level 2 Study Modules 4-5-6-7-8--22 Questions and Answers Rated A During arc welding there is a zone adjacent to the weld metal that reaches high temperatures but does not melt. What is the name of this region? Heat Affect Zone (HAZ) In parallel electrical circuits, the voltage across each resistor is the same since each path is connected to the same voltage source. Select the correct statement. A. in each parallel path the resistance must be equalized to create equal voltage. B. the cur...

______-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 wh...

The basic unit for measuring current flow is c weight b.CouIomb c.VoIt d.Ampere - Ampere The basic unit of resistance is a.Ohm b.CouIomb c.Ampere d.V01t - Ohm Which of the following is not a valid expression of Ohm's law? (in this equation E (electromotive force) is the dame as V (Voltage) Which of the following is not a unit for measuring alternating frequencies? a. Cycles per second b. Volts c. Hertz d. Kilocycles - Volts Which of the following describes the action of a c...

NCCER 26201 : Alternating Current - Electromagnetic Induction - (AC) Circuits Exam Test Combined Questions With Revised Correct Answers BEST UPDATED COMBINED SET!! 20. according to the power triangle, the apparent power is ______. - ANSWER (C) greater than the true power 21. which of the following uses electromagnetic inductions to transfer electrical energy from one circuit to another. - ANSWER (C) Transformer 22. given: a Transformer has 200 turns in the pri...

NETA 2 Top Exam Questions and answers, rated A+ Under what considerations can tag out without lock out be permitted? - -***&If an energy isolating device is not capable of being locked For PV systems, a(n) _____ is a device that changes direct-current input to an alternating-current output. - -Inverter Identify the contact pictured above. (NC and NO separated by a node) - -Form C When applying personal protective grounds, which end is attached first? - -***&The equipment end An ...

What is the most important law applicable to the study of electricity? - Answer-Ohm's Law (V = I x R) What are the elements of Ohm's Law? - Answer-Voltage (v), Current (I), Resistance (R) What are 4 sources of electrical power? - Answer-Mechanical (generator/ alternator), Chemical (battery), Photoelectric (light), and Thermal (heat) What does an electrical circuit consist of? - Answer-A source of electrical pressure (EMF), Resistance in the form of an energy consuming electrical devic...

CWB Level 2 Study Questions rev 1 WITH 100% CORRECT ANSWERS In parallel electrical circuits, the voltage across each resistor is the same since each path is connected to the same voltage source. Select the correct statement. A. in each parallel path the resistance must be equalized to create equal voltage. B. the current flowing in each parallel path must be the same as the voltage. C. the current flowing in each parallel path depends on the resistance in each path D. the current flowi...

The working voltage of a capacitor in an AC circuit should be CORRECT ANSWER at least 50 percent greater than the highest applied voltage The term that describes the combinded resistive forces in an AC circuit is CORRECT ANSWER impedance What is the opposition to the flow of AC produced by a magnetif field with generated back voltage (EMF) called? CORRECT ANSWER Inductive reactance Electrostatic fields are known as CORRECT ANSWER electrostatic fields The basis for transformer operati...

The ordinary direct current series motor does not operate satisfactorily with alternating current. One of the main reasons for this is a. excessive heating due to eddy currents in the solid parts of the field structure b. that the armature current and field current are out of phase with each other c. that the field flux lags 120 in time phase with respect to the line voltage d. excessive heating due to the low voltage drop in the series field - ANSWER-a. excessive heating due to eddy curr...

What is the name of the process that changes alternating current into direct current? correct answers Rectification What is the most accurate type of timer? correct answers Electronic Where in the x ray circuit is the timer circuitry located? correct answers Between the auto transformer and the step up transformer What is the advantage of three phase equipment over single phase equipment? correct answers Can achieve shorter exposure times The spinning top test can be used to determin...