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CDC 2A652N - Volume 2 - Electrical and Electrical Circuits & Components

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  • CDC 2A652N - Volume 2 - Electrical and Electrical Circuits & Components

    Question 1 of 60

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    Every atom must contain what types of particles?

    Select one of the following:

    • Electrons and protons

    • Electrons and neutrons

    • Protons and neutrons

    • Electrons, protons and neutrons

    Question 2 of 60

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    An atom with 8 electrons in its outermost shell is said to be

    Select one of the following:

    • Free

    • Stable

    • Valence

    • Ionized

    Question 3 of 60

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    How many valence electrons are needed to make a good conductor?

    Select one of the following:

    • 3

    • 4

    • 5

    • 6

    Question 4 of 60

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    "Dielectric" is the term used for

    Select one of the following:

    • Conductors

    • Insulators

    • Doped atoms

    • Semi-conductors

    Question 5 of 60

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    The flow or drift of electrons through a conductor” in the same direction at the same time is the definition of

    Select one of the following:

    • Conductivity

    • Voltage

    • Current

    • Valence

    Question 6 of 60

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    The potential difference between two points in a circuit that exerts a force on free electrons is called

    Select one of the following:

    • Conductivity

    • Voltage

    • Current

    • Valence

    Question 7 of 60

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    What is used to control current flow in a circuit?

    Select one of the following:

    • Voltage

    • Coulombs

    • Resistance

    • Conductivity

    Question 8 of 60

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    The relationship of voltage, current and resistance is expressed through

    Select one of the following:

    • E, I and C

    • Power formulas

    • Conductance

    • Ohm's Law

    Question 9 of 60

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    Total current in a series circuit is equal to the

    Select one of the following:

    • Current through one component

    • Sum of the current through each component

    • Reciprocal of the current through one component

    • Reciprocal of the sum of the currents through each component

    Question 10 of 60

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    What is the wattage of a circuit with 28 volts applied and a total resistance of .2 ohms?

    Select one of the following:

    • .14 watts (w)

    • .14 kilowatts (kW)

    • 3.92 W

    • 3.92 kW

    Question 11 of 60

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    In a parallel circuit, the total voltage is equal to the

    Select one of the following:

    • Sum of the voltages across each branch

    • Voltage across each resistor

    • Voltage across each branch

    • The reciprocal of the voltage across the resistances

    Question 12 of 60

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    Source current in a parallel circuit will be divided according to branch

    Select one of the following:

    • Voltage

    • Powers

    • Lengths

    • Resistances

    Question 13 of 60

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    The area around a magnet where its influence can be felt is the definition of the

    Select one of the following:

    • Saturation principle

    • Magnetic theory

    • Magnetic field

    • Law of attraction and repulsion

    Question 14 of 60

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    “The ability of a material to pass lines of force” is a definition of

    Select one of the following:

    • Permeability

    • Reluctance

    • Electromagnetism

    • Retentively

    Question 15 of 60

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    The magnetism that remains after the magnetizing force has been removed is known as

    Select one of the following:

    • Electromagnetism

    • Molecular magnetism

    • Permeability

    • Residual magnetism

    Question 16 of 60

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    The magnetic field of an electromagnet can be varied by changing the

    Select one of the following:

    • Type of core

    • Number of turns in the coil

    • Amount of current through the coil

    • All of the above

    Question 17 of 60

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    The electromechanical generation of a voltage requires a magnetic field, relative motion, and

    Select one of the following:

    • A complete circuit

    • A conductor

    • An insulator

    • A load

    Question 18 of 60

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    The principle behind all electromechanical generation is

    Select one of the following:

    • Conduction

    • Commutation

    • Rectification

    • Electromagnetic induction

    Question 19 of 60

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    The function of the commutator in a DC generator is to

    Select one of the following:

    • Complete the circuit to the load

    • Induce DC into the external circuit

    • Rectify the input

    • Change AC voltage to DC voltage

    Question 20 of 60

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    Because an inductor stores energy and then returns it to the circuit, it is called a

    Select one of the following:

    • Resistive device

    • Reactive device

    • Retentive device

    • Retroactive device

    Question 21 of 60

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    An inductor stores energy in the form of

    Select one of the following:

    • Heat

    • Resistance

    • A magnetic field

    • An electrostatic field

    Question 22 of 60

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    The process by which a current change in one coil produces a voltage in another coil is called

    Select one of the following:

    • Inductance

    • Self-induction

    • Mutual induction

    • None of the above

    Question 23 of 60

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    A transformer will change all of the following except

    Select one of the following:

    • Power

    • Current

    • Voltage

    • Resistance

    Question 24 of 60

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    Normally, the winding of a transformer that is connected to a power source is known as the

    Select one of the following:

    • Field winding

    • Primary winding

    • Current winding

    • Secondary winding

    Question 25 of 60

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    What kind of turns of wire is found in the secondary windings of a step up transformer?

    Select one of the following:

    • Equal

    • Less

    • More

    • All of the above

    Question 26 of 60

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    A relay is an electrically operated

    Select one of the following:

    • Meter

    • Motor

    • Switch

    • Safety device

    Question 27 of 60

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    A relay that, once energized, requires a second coil to be energized before the contacts will return to their original positions is called a

    Select one of the following:

    • Locking relay

    • Latching relay

    • Timing relay

    • Tripping relay

    Question 28 of 60

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    A capacitor stores energy in the form of

    Select one of the following:

    • Heat

    • Resistance

    • A magnetic field

    • An electrostatic field

    Question 29 of 60

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    In a capacitor, the dielectric is the

    Select one of the following:

    • Positive lead

    • Conductor

    • Insulator

    • Outer case

    Question 30 of 60

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    Opposition of a capacitor to AC is called

    Select one of the following:

    • Inductive reactance

    • Impedance

    • Capactive reactance

    • Capacitance

    Question 31 of 60

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    The factors which determine the time required to charge a capacitor are the capacitance and the

    Select one of the following:

    • Applied voltage

    • Circuit current

    • Amount of resistance

    • Type of dielectric

    Question 32 of 60

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    The anode of a diode is constructed of

    Select one of the following:

    • Neutral material

    • Biased material

    • Positive material

    • Negative material

    Question 33 of 60

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    Expanding or contracting the depletion region of a diode is called

    Select one of the following:

    • Basing

    • Gating

    • Spiking

    • Biasing

    Question 34 of 60

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    A diode placed in a circuit in reverse bias is being used as

    Select one of the following:

    • A spike protector

    • An amplifier

    • A regulator

    • A rectifier

    Question 35 of 60

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    A zener will conduct in reverse bias

    Select one of the following:

    • For a second or two at a time

    • Until gate potential has been reached

    • Once the avalanche point has been reached

    • Until the breakdown point has been reached

    Question 36 of 60

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    A zener being used as a regulator must have a resistor placed in the circuit in

    Select one of the following:

    • Series

    • Parallel

    • Reverse bias

    • Series-parallel

    Question 37 of 60

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    What is the approximate operating voltage of a LED?

    Select one of the following:

    • .5 volts

    • .1 volt

    • 1.6 volts

    • 2.4 volts

    Question 38 of 60

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    The SCR has how many PN junctions?

    Select one of the following:

    • 1

    • 2

    • 3

    • 4

    Question 39 of 60

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    The amount of current required to gate an SCR is called

    Select one of the following:

    • Forward break over voltage

    • Holding current

    • Peak voltage

    • Gate current

    Question 40 of 60

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    In order for an SCR to be turned off

    Select one of the following:

    • The forward break over voltage must exceed the holding voltage.

    • The current must drop below the holding current.

    • The negative amp switch must activate.

    • The negative volt switch must activate.

    Question 41 of 60

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    The best method of troubleshooting is the

    Select one of the following:

    • Systematic method

    • Instantaneous method

    • Hit-and-miss method

    • Trial-and-error method

    Question 42 of 60

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    Which troubleshooting step is done by knowing proper equipment operation?

    Select one of the following:

    • Analysis

    • Recognition

    • Repair and check

    • Elimination and isolation

    Question 43 of 60

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    During which troubleshooting step do you try to determine which system could cause the malfunction?

    Select one of the following:

    • Analysis

    • Verification

    • Recognition

    • Elimination and isolation

    Question 44 of 60

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    During which troubleshooting step do you first use the schematic diagram?

    Select one of the following:

    • Recognition

    • Verification

    • Analysis

    • Isolation

    Question 45 of 60

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    Which troubleshooting aid is designed to aid you if you see an unfamiliar symbol?

    Select one of the following:

    • Zones

    • Schematic

    • Wiring diagram

    • Reference designation index

    Question 46 of 60

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    Which troubleshooting aid is designed to aid you in finding components on a diagram?

    Select one of the following:

    • Zones

    • Schematic

    • Wiring diagram

    • Reference designation index

    Question 47 of 60

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    When used in a series circuit to measure voltage, how is a multimeter connected in the circuit?

    Select one of the following:

    • In series

    • To ground

    • In parallel

    • In series-parallel

    Question 48 of 60

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    To set a value to the height of the oscilloscope grid markings, you adjust the

    Select one of the following:

    • Focus

    • Pitch control

    • Voltage selector

    • Time sweep selector

    Question 49 of 60

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    To ensure accuracy of an oscilloscope when preparing for operation you should always,

    Select one of the following:

    • Zero the display

    • Center the display

    • Identify the cal point and adjust to zero

    • Identify the cal point and calibrate the display

    Question 50 of 60

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    When you are testing a transformer, an open coil reading on the 8025A multimeter will be indicated by

    Select one of the following:

    • A beep

    • An extending analog bar graph

    • OL

    • 0 ohms

    Question 51 of 60

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    Which could be the indication from the 8025A multimeter when you are checking a serviceable capacitor?

    Select one of the following:

    • A beep

    • An extending analog bar graph

    • OL

    • 0 ohms

    Question 52 of 60

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    How many junctions are checked to test the serviceability of a transistor?

    Select one of the following:

    • 1

    • 2

    • 3

    • 4

    Question 53 of 60

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    When checking a FET, you must check the diode junction and the continuity between the

    Select one of the following:

    • Gate and source

    • Source and drain

    • Gate and substrate

    • Substrate and drain

    Question 54 of 60

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    How can you identify an electrostatic sensitive device?

    Select one of the following:

    • The package will have special coloring as specified in local directives.

    • The package will have a special control number as specified in local directives.

    • It will be marked with the MIL-STD–129 symbol or a caution marking.

    • It will be marked with the MIL-SPC–235 symbol or a warning marking.

    Question 55 of 60

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    A heat sink is used in soldering to

    Select one of the following:

    • Prevent heat from damaging the component being soldered

    • Prevent heat from damaging other components in the circuit

    • Apply heat to the component being soldered

    • Apply heat to other components in the circuit

    Question 56 of 60

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    A pitted or worn soldering iron tip should be redressed with a flat, fine, single-cut file and should be

    Select one of the following:

    • Tinned

    • Clean of solder

    • Replaced

    • Checked for length

    Question 57 of 60

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    The first step in soldering a conductor is to

    Select one of the following:

    • Wick the wire

    • Remove the insulation

    • Apply heat to the connection

    • Apply solder to the connection

    Question 58 of 60

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    When soldering flat perforated terminals, the conductor is connected to the terminal using

    Select one of the following:

    • 90 degree wrap

    • 180 degree wrap

    • 270 degree wrap

    • 360 degree wrap

    Question 59 of 60

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    A wire is inserted into a solder cup until the

    Select one of the following:

    • Wire touches the bottom

    • Wire clears the top of the cup

    • Insulation touches the cup

    • Wire protrudes from the weep hole

    Question 60 of 60

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    The best method of repairing a lifted circuit track on a PCB is to

    Select one of the following:

    • Bond it

    • Glue it

    • Replace it with bare wire

    • Replace it with insulated wire

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