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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

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

Question 1 of 60

1

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

Explanation

Question 2 of 60

1

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

Select one of the following:

  • Free

  • Stable

  • Valence

  • Ionized

Explanation

Question 3 of 60

1

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

Select one of the following:

  • 3

  • 4

  • 5

  • 6

Explanation

Question 4 of 60

1

"Dielectric" is the term used for

Select one of the following:

  • Conductors

  • Insulators

  • Doped atoms

  • Semi-conductors

Explanation

Question 5 of 60

1

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

Explanation

Question 6 of 60

1

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

Explanation

Question 7 of 60

1

What is used to control current flow in a circuit?

Select one of the following:

  • Voltage

  • Coulombs

  • Resistance

  • Conductivity

Explanation

Question 8 of 60

1

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

Explanation

Question 9 of 60

1

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

Explanation

Question 10 of 60

1

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

Explanation

Question 11 of 60

1

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

Explanation

Question 12 of 60

1

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

Select one of the following:

  • Voltage

  • Powers

  • Lengths

  • Resistances

Explanation

Question 13 of 60

1

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

Explanation

Question 14 of 60

1

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

Select one of the following:

  • Permeability

  • Reluctance

  • Electromagnetism

  • Retentively

Explanation

Question 15 of 60

1

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

Explanation

Question 16 of 60

1

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

Explanation

Question 17 of 60

1

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

Explanation

Question 18 of 60

1

The principle behind all electromechanical generation is

Select one of the following:

  • Conduction

  • Commutation

  • Rectification

  • Electromagnetic induction

Explanation

Question 19 of 60

1

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

Explanation

Question 20 of 60

1

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

Explanation

Question 21 of 60

1

An inductor stores energy in the form of

Select one of the following:

  • Heat

  • Resistance

  • A magnetic field

  • An electrostatic field

Explanation

Question 22 of 60

1

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

Explanation

Question 23 of 60

1

A transformer will change all of the following except

Select one of the following:

  • Power

  • Current

  • Voltage

  • Resistance

Explanation

Question 24 of 60

1

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

Explanation

Question 25 of 60

1

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

Explanation

Question 26 of 60

1

A relay is an electrically operated

Select one of the following:

  • Meter

  • Motor

  • Switch

  • Safety device

Explanation

Question 27 of 60

1

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

Explanation

Question 28 of 60

1

A capacitor stores energy in the form of

Select one of the following:

  • Heat

  • Resistance

  • A magnetic field

  • An electrostatic field

Explanation

Question 29 of 60

1

In a capacitor, the dielectric is the

Select one of the following:

  • Positive lead

  • Conductor

  • Insulator

  • Outer case

Explanation

Question 30 of 60

1

Opposition of a capacitor to AC is called

Select one of the following:

  • Inductive reactance

  • Impedance

  • Capactive reactance

  • Capacitance

Explanation

Question 31 of 60

1

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

Explanation

Question 32 of 60

1

The anode of a diode is constructed of

Select one of the following:

  • Neutral material

  • Biased material

  • Positive material

  • Negative material

Explanation

Question 33 of 60

1

Expanding or contracting the depletion region of a diode is called

Select one of the following:

  • Basing

  • Gating

  • Spiking

  • Biasing

Explanation

Question 34 of 60

1

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

Explanation

Question 35 of 60

1

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

Explanation

Question 36 of 60

1

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

Explanation

Question 37 of 60

1

What is the approximate operating voltage of a LED?

Select one of the following:

  • .5 volts

  • .1 volt

  • 1.6 volts

  • 2.4 volts

Explanation

Question 38 of 60

1

The SCR has how many PN junctions?

Select one of the following:

  • 1

  • 2

  • 3

  • 4

Explanation

Question 39 of 60

1

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

Explanation

Question 40 of 60

1

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.

Explanation

Question 41 of 60

1

The best method of troubleshooting is the

Select one of the following:

  • Systematic method

  • Instantaneous method

  • Hit-and-miss method

  • Trial-and-error method

Explanation

Question 42 of 60

1

Which troubleshooting step is done by knowing proper equipment operation?

Select one of the following:

  • Analysis

  • Recognition

  • Repair and check

  • Elimination and isolation

Explanation

Question 43 of 60

1

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

Explanation

Question 44 of 60

1

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

Select one of the following:

  • Recognition

  • Verification

  • Analysis

  • Isolation

Explanation

Question 45 of 60

1

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

Explanation

Question 46 of 60

1

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

Explanation

Question 47 of 60

1

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

Explanation

Question 48 of 60

1

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

Explanation

Question 49 of 60

1

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

Explanation

Question 50 of 60

1

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

Explanation

Question 51 of 60

1

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

Explanation

Question 52 of 60

1

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

Select one of the following:

  • 1

  • 2

  • 3

  • 4

Explanation

Question 53 of 60

1

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

Explanation

Question 54 of 60

1

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.

Explanation

Question 55 of 60

1

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

Explanation

Question 56 of 60

1

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

Explanation

Question 57 of 60

1

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

Explanation

Question 58 of 60

1

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

Explanation

Question 59 of 60

1

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

Explanation

Question 60 of 60

1

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

Explanation

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