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Electric Wiring) Exam Questions And
Answers Latest Update
Describe the two types of electrical current and give an application of each - - - correct answer โ
-Direct Current DC: electricity that flows in only one direction. (a battery is a common source of DC current and its used in flashlights, remotes, portable radios. etc.) -Alternating Current AC: flows alternately in one direction and then in the other. (AC electricity is used at home, school, and work. the wall outlets are a source of AC electricity. describe the function of the four basic components of an electric circuit - - - correct answer โ
-Power Supply: this device supplies the energy needed to create an electrical current. -Input Device: this is the part that allows you to control when the current will flow in a circuit. -Output Device: this is component produces a desired output. it is also referred to as a load. -Conductor: this is the part that connects all the components and allows current to flow. describe the operation of two types of power supplies and give their schematic symbols - - - correct answer โ
-Constant Current Power Supply: provides the
Electric Wiring) Exam Questions And
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same current level regardless of the demand placed on it by the load -Constant Voltage Power Supply: this power supply maintains a constant voltage output, regardless of the load. describe the function of an electrical schematic - - - correct answer โ
is a form of visual shorthand where each component is represented by a standard symbol. it represents the components in a circuit and how they are connected. Describe the operation of a manual switch that controls NO and NC contacts and give the symbol that represents the component - - - correct answer โ
switches use two types of contacts: -Normally Open (N.O.): these contacts are open until acted upon by the operator. -Normally Closed (N.C.): these contacts are closed until acted upon by the operator. describe the function of a switch that controls an output device and draw a circuit that represents it and contains the correct symbols. -
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switches are commonly used in electrical circuits to control when the power is supplied to an output device.
Electric Wiring) Exam Questions And
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describe how voltage works in series and parallel circuits - - - correct answer โ
- in a series circuit, the total voltage supplied by the power supply is divided among the loads. each load in the circuit uses a certain amount of the voltage as the current travels through it leaving less voltage available for the next load to use. (Vt= V1+V2+V3)
- in a parallel circuit, the same amount of voltage is available to each of the branches of the circuit. the voltage available to each branch is equal to the source voltage. (Vt= V1=V2=V3) define current and give its units of measurement - - - correct answer โ
the flow of electrons through a circuit. its unit of measurement is an amp(A) 0.001A= 1mA describe how to use an ammeter to measure current - - - correct answer โ
current measurements are taken in series with the component. describe the current characteristics in series and parallel circuits - - - correct answer โ
-in a series circuit, current flows from the positive terminal of the power supply to the negative terminal through each component in the circuit. the current does not change as it flows through a series circuit. (It=I1=I2=I3)
Electric Wiring) Exam Questions And
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-in a parallel circuit, the current is divided among the branches of the circuit. the amount of current that flows in each branch depends on the amount of resistance in that branch. (It=I1+I2+I3) define resistance and give its units of measurement - - - correct answer โ
the measure of a components ability to resist the flow of current in a circuit. the units of measurement for resistance are ohms (omega symbol) describe how resistance and continuity is measured in series and parallel circuit - - - correct answer โ
resistance and continuity of a component is measured parallel or across the component. -total resistance in a series circuit, all individual resistances are added together. (Rt= R1+R2+R3) -total resistance in a parallel circuit, the total resistance actually decreases as more loads are added. Rt=1/{(1/R1)+(1/R2)+(1/R3)} describe how a voltage drop is measured in a series and parallel circuit - - -
Electric Wiring) Exam Questions And
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state a formula for calculating the total power used in an electrical circuit - - - correct answer โ
state Kirchoff's current law and give an application - - - correct answer โ
state a formula for calculating total parallel resistance. - - - correct answer โ
describe the function of two types of circuit protection and give an application of each - - - correct answer โ
describe the operation of a fuse and give its schematic symbol - - - correct answer โ
describe the operation of two types of circuit breakers and give their schematic symbols - - -
Electric Wiring) Exam Questions And
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calculate series resistance given each load's resistance - - - correct answer โ
use Ohm's law to calculate voltage, current, and resistance in a series circuit - - - correct answer โ
calculate the total power used by a series circuit - - - correct answer โ
calculate the main line current in a parallel circuit. - - - correct answer โ
calculate the total parallel resistance - - - correct answer โ
calculate the total power used in a parallel circuit. - - - correct answer โ
define inductance and give its units of measurement - - -
Electric Wiring) Exam Questions And
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describe the function of capacitors and inductors in electric power supplies. - - - correct answer โ
describe how to identify a series and parallel circuit - - - correct answer โ
describe the function of a variable resistor and give an application. -
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describe how to find a short in an electrical circuit - - - correct answer โ
describe the three basic steps for troubleshooting an open circuit - -
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locate a short circuit - - -
Electric Wiring) Exam Questions And
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locate an open circuit - - - correct answer โ
describe how control transformers are applied in industrial circuits -
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describe the relationship between input and output current, voltage, power, and turns ratio for a control transformer - - - correct answer โ
describe how to troubleshoot a transformer - - - correct answer โ
describe how to connect and operate control transformers with multi-voltage taps - - - correct answer โ
describe the operating data on motor and transformer nameplates and the identification, marking and connection of their leads - - -
Electric Wiring) Exam Questions And
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describe the protective functions of motor starter and the sizing of fuses and overloads - - - correct answer โ
describe the structure and organization of a basic control system - -
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describe JIC and IEC symbols & standards for industrial electrical documentation - - - correct answer โ
Describe the logical operations of AND, OR, NOR, NAND, NOT, and MEMORY in hard-wired systems - - - correct answer โ
Apply inputs, outputs and logic to perform control functions. - - - correct answer โ
describe control relay components, function and operation. - - -
Electric Wiring) Exam Questions And
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describe operation and function of various control circuits including 2 wire and 3 wire control - - - correct answer โ
describe methods of testing various industrial electrical control component including pilot devices, relays, transformers and motors. - - - correct answer โ
describe methods of analyzing symptoms and troubleshooting systems of industrial electrical components. - - - correct answer โ
describe how wire is sized for an application - - - correct answer โ
describe the function of the National Electrical Code. - - - correct answer โ
Describe two factors to consider when sizing wire for an application. - - -
Electric Wiring) Exam Questions And
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determine the number of wires that can be installed in one conduit.
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connect the wiring system to the service - - - correct answer โ
describe the function of a control relay and give an application - - - correct answer โ
describe the operation of a control relay and give its schematic symbol - - - correct answer โ
describe the operation of two types of control relays and give an application of each. - - - correct answer โ
describe how detached symbology is used to show a control relay on a ladder diagram. - - -
Electric Wiring) Exam Questions And
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describe the operation of memory logic and give an application - - - correct answer โ
describe the operation of a magnetic motor starter - - - correct answer โ
describe the operation of a two-wire motor control circuit and give an application. - - - correct answer โ
describe the operation of a three-wire motor control circuit and give an application. - - - correct answer โ
describe the function of a push-to-test pilot light and give an application and its schematic symbol. - - - correct answer โ
describe two levels of troubleshooting and give an application of each. - - -
Electric Wiring) Exam Questions And
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describe the process of Lockout/Tagout as a safe work practice. - - - correct answer โ
understand the general requirements of the NFPA 70E standard as it relates to industrial electrical hazards in the workplace. - - - correct answer โ
understand the necessary equipment and safely considerations to prevent electrical shock in the workplace. - - -
