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Industrial Electricity PMMI (AC/DC, EMC, Electric Wiring) Exam Questions And Answers Lates, Exams of Electric Machines

Industrial Electricity PMMI (AC/DC, EMC, Electric Wiring) Exam Questions And Answers Latest Update

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2024/2025

Available from 01/05/2025

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Industrial Electricity PMMI (AC/DC, EMC,
Electric Wiring) Exam Questions And
Answers Latest Update
Describe the two types of electrical current and give an application
of each - - -
correct answer โœ…-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 โœ…-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 โœ…-Constant Current Power Supply: provides the
pf3
pf4
pf5
pf8
pf9
pfa
pfd
pfe
pff
pf12
pf13

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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 โœ…-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 โœ…-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 โœ…-Constant Current Power Supply: provides the

Electric Wiring) Exam Questions And

Answers Latest Update

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 โœ…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 โœ…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. -

correct answer โœ…switches are commonly used in electrical circuits to control when the power is supplied to an output device.

Electric Wiring) Exam Questions And

Answers Latest Update

describe how voltage works in series and parallel circuits - - - correct answer โœ…- 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 โœ…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 โœ…current measurements are taken in series with the component. describe the current characteristics in series and parallel circuits - - - correct answer โœ…-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

Answers Latest Update

-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 โœ…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 โœ…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

Answers Latest Update

state a formula for calculating the total power used in an electrical circuit - - - correct answer โœ… state Kirchoff's current law and give an application - - - correct answer โœ… state a formula for calculating total parallel resistance. - - - correct answer โœ… describe the function of two types of circuit protection and give an application of each - - - correct answer โœ… describe the operation of a fuse and give its schematic symbol - - - correct answer โœ… describe the operation of two types of circuit breakers and give their schematic symbols - - -

Electric Wiring) Exam Questions And

Answers Latest Update

calculate series resistance given each load's resistance - - - correct answer โœ… use Ohm's law to calculate voltage, current, and resistance in a series circuit - - - correct answer โœ… calculate the total power used by a series circuit - - - correct answer โœ… calculate the main line current in a parallel circuit. - - - correct answer โœ… calculate the total parallel resistance - - - correct answer โœ… calculate the total power used in a parallel circuit. - - - correct answer โœ… define inductance and give its units of measurement - - -

Electric Wiring) Exam Questions And

Answers Latest Update

describe the function of capacitors and inductors in electric power supplies. - - - correct answer โœ… describe how to identify a series and parallel circuit - - - correct answer โœ… describe the function of a variable resistor and give an application. -

correct answer โœ… describe how to find a short in an electrical circuit - - - correct answer โœ… describe the three basic steps for troubleshooting an open circuit - -

correct answer โœ… locate a short circuit - - -

Electric Wiring) Exam Questions And

Answers Latest Update

locate an open circuit - - - correct answer โœ… describe how control transformers are applied in industrial circuits -

correct answer โœ… describe the relationship between input and output current, voltage, power, and turns ratio for a control transformer - - - correct answer โœ… describe how to troubleshoot a transformer - - - correct answer โœ… describe how to connect and operate control transformers with multi-voltage taps - - - correct answer โœ… describe the operating data on motor and transformer nameplates and the identification, marking and connection of their leads - - -

Electric Wiring) Exam Questions And

Answers Latest Update

describe the protective functions of motor starter and the sizing of fuses and overloads - - - correct answer โœ… describe the structure and organization of a basic control system - -

correct answer โœ… describe JIC and IEC symbols & standards for industrial electrical documentation - - - correct answer โœ… Describe the logical operations of AND, OR, NOR, NAND, NOT, and MEMORY in hard-wired systems - - - correct answer โœ… Apply inputs, outputs and logic to perform control functions. - - - correct answer โœ… describe control relay components, function and operation. - - -

Electric Wiring) Exam Questions And

Answers Latest Update

describe operation and function of various control circuits including 2 wire and 3 wire control - - - correct answer โœ… describe methods of testing various industrial electrical control component including pilot devices, relays, transformers and motors. - - - correct answer โœ… describe methods of analyzing symptoms and troubleshooting systems of industrial electrical components. - - - correct answer โœ… describe how wire is sized for an application - - - correct answer โœ… describe the function of the National Electrical Code. - - - correct answer โœ… Describe two factors to consider when sizing wire for an application. - - -

Electric Wiring) Exam Questions And

Answers Latest Update

determine the number of wires that can be installed in one conduit.


correct answer โœ… connect the wiring system to the service - - - correct answer โœ… describe the function of a control relay and give an application - - - correct answer โœ… describe the operation of a control relay and give its schematic symbol - - - correct answer โœ… describe the operation of two types of control relays and give an application of each. - - - correct answer โœ… describe how detached symbology is used to show a control relay on a ladder diagram. - - -

Electric Wiring) Exam Questions And

Answers Latest Update

describe the operation of memory logic and give an application - - - correct answer โœ… describe the operation of a magnetic motor starter - - - correct answer โœ… describe the operation of a two-wire motor control circuit and give an application. - - - correct answer โœ… describe the operation of a three-wire motor control circuit and give an application. - - - correct answer โœ… describe the function of a push-to-test pilot light and give an application and its schematic symbol. - - - correct answer โœ… describe two levels of troubleshooting and give an application of each. - - -

Electric Wiring) Exam Questions And

Answers Latest Update

describe the process of Lockout/Tagout as a safe work practice. - - - correct answer โœ… understand the general requirements of the NFPA 70E standard as it relates to industrial electrical hazards in the workplace. - - - correct answer โœ… understand the necessary equipment and safely considerations to prevent electrical shock in the workplace. - - -