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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
nicilynn1981
Quiz por nicilynn1981, atualizado more than 1 year ago
nicilynn1981
Criado por nicilynn1981 aproximadamente 9 anos atrás
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Resumo de Recurso

Questão 1

Questão
Every atom must contain what types of particles?
Responda
  • Electrons and protons
  • Electrons and neutrons
  • Protons and neutrons
  • Electrons, protons and neutrons

Questão 2

Questão
An atom with 8 electrons in its outermost shell is said to be
Responda
  • Free
  • Stable
  • Valence
  • Ionized

Questão 3

Questão
How many valence electrons are needed to make a good conductor?
Responda
  • 3
  • 4
  • 5
  • 6

Questão 4

Questão
"Dielectric" is the term used for
Responda
  • Conductors
  • Insulators
  • Doped atoms
  • Semi-conductors

Questão 5

Questão
The flow or drift of electrons through a conductor” in the same direction at the same time is the definition of
Responda
  • Conductivity
  • Voltage
  • Current
  • Valence

Questão 6

Questão
The potential difference between two points in a circuit that exerts a force on free electrons is called
Responda
  • Conductivity
  • Voltage
  • Current
  • Valence

Questão 7

Questão
What is used to control current flow in a circuit?
Responda
  • Voltage
  • Coulombs
  • Resistance
  • Conductivity

Questão 8

Questão
The relationship of voltage, current and resistance is expressed through
Responda
  • E, I and C
  • Power formulas
  • Conductance
  • Ohm's Law

Questão 9

Questão
Total current in a series circuit is equal to the
Responda
  • 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

Questão 10

Questão
What is the wattage of a circuit with 28 volts applied and a total resistance of .2 ohms?
Responda
  • .14 watts (w)
  • .14 kilowatts (kW)
  • 3.92 W
  • 3.92 kW

Questão 11

Questão
In a parallel circuit, the total voltage is equal to the
Responda
  • Sum of the voltages across each branch
  • Voltage across each resistor
  • Voltage across each branch
  • The reciprocal of the voltage across the resistances

Questão 12

Questão
Source current in a parallel circuit will be divided according to branch
Responda
  • Voltage
  • Powers
  • Lengths
  • Resistances

Questão 13

Questão
The area around a magnet where its influence can be felt is the definition of the
Responda
  • Saturation principle
  • Magnetic theory
  • Magnetic field
  • Law of attraction and repulsion

Questão 14

Questão
“The ability of a material to pass lines of force” is a definition of
Responda
  • Permeability
  • Reluctance
  • Electromagnetism
  • Retentively

Questão 15

Questão
The magnetism that remains after the magnetizing force has been removed is known as
Responda
  • Electromagnetism
  • Molecular magnetism
  • Permeability
  • Residual magnetism

Questão 16

Questão
The magnetic field of an electromagnet can be varied by changing the
Responda
  • Type of core
  • Number of turns in the coil
  • Amount of current through the coil
  • All of the above

Questão 17

Questão
The electromechanical generation of a voltage requires a magnetic field, relative motion, and
Responda
  • A complete circuit
  • A conductor
  • An insulator
  • A load

Questão 18

Questão
The principle behind all electromechanical generation is
Responda
  • Conduction
  • Commutation
  • Rectification
  • Electromagnetic induction

Questão 19

Questão
The function of the commutator in a DC generator is to
Responda
  • Complete the circuit to the load
  • Induce DC into the external circuit
  • Rectify the input
  • Change AC voltage to DC voltage

Questão 20

Questão
Because an inductor stores energy and then returns it to the circuit, it is called a
Responda
  • Resistive device
  • Reactive device
  • Retentive device
  • Retroactive device

Questão 21

Questão
An inductor stores energy in the form of
Responda
  • Heat
  • Resistance
  • A magnetic field
  • An electrostatic field

Questão 22

Questão
The process by which a current change in one coil produces a voltage in another coil is called
Responda
  • Inductance
  • Self-induction
  • Mutual induction
  • None of the above

Questão 23

Questão
A transformer will change all of the following except
Responda
  • Power
  • Current
  • Voltage
  • Resistance

Questão 24

Questão
Normally, the winding of a transformer that is connected to a power source is known as the
Responda
  • Field winding
  • Primary winding
  • Current winding
  • Secondary winding

Questão 25

Questão
What kind of turns of wire is found in the secondary windings of a step up transformer?
Responda
  • Equal
  • Less
  • More
  • All of the above

Questão 26

Questão
A relay is an electrically operated
Responda
  • Meter
  • Motor
  • Switch
  • Safety device

Questão 27

Questão
A relay that, once energized, requires a second coil to be energized before the contacts will return to their original positions is called a
Responda
  • Locking relay
  • Latching relay
  • Timing relay
  • Tripping relay

Questão 28

Questão
A capacitor stores energy in the form of
Responda
  • Heat
  • Resistance
  • A magnetic field
  • An electrostatic field

Questão 29

Questão
In a capacitor, the dielectric is the
Responda
  • Positive lead
  • Conductor
  • Insulator
  • Outer case

Questão 30

Questão
Opposition of a capacitor to AC is called
Responda
  • Inductive reactance
  • Impedance
  • Capactive reactance
  • Capacitance

Questão 31

Questão
The factors which determine the time required to charge a capacitor are the capacitance and the
Responda
  • Applied voltage
  • Circuit current
  • Amount of resistance
  • Type of dielectric

Questão 32

Questão
The anode of a diode is constructed of
Responda
  • Neutral material
  • Biased material
  • Positive material
  • Negative material

Questão 33

Questão
Expanding or contracting the depletion region of a diode is called
Responda
  • Basing
  • Gating
  • Spiking
  • Biasing

Questão 34

Questão
A diode placed in a circuit in reverse bias is being used as
Responda
  • A spike protector
  • An amplifier
  • A regulator
  • A rectifier

Questão 35

Questão
A zener will conduct in reverse bias
Responda
  • 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

Questão 36

Questão
A zener being used as a regulator must have a resistor placed in the circuit in
Responda
  • Series
  • Parallel
  • Reverse bias
  • Series-parallel

Questão 37

Questão
What is the approximate operating voltage of a LED?
Responda
  • .5 volts
  • .1 volt
  • 1.6 volts
  • 2.4 volts

Questão 38

Questão
The SCR has how many PN junctions?
Responda
  • 1
  • 2
  • 3
  • 4

Questão 39

Questão
The amount of current required to gate an SCR is called
Responda
  • Forward break over voltage
  • Holding current
  • Peak voltage
  • Gate current

Questão 40

Questão
In order for an SCR to be turned off
Responda
  • 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.

Questão 41

Questão
The best method of troubleshooting is the
Responda
  • Systematic method
  • Instantaneous method
  • Hit-and-miss method
  • Trial-and-error method

Questão 42

Questão
Which troubleshooting step is done by knowing proper equipment operation?
Responda
  • Analysis
  • Recognition
  • Repair and check
  • Elimination and isolation

Questão 43

Questão
During which troubleshooting step do you try to determine which system could cause the malfunction?
Responda
  • Analysis
  • Verification
  • Recognition
  • Elimination and isolation

Questão 44

Questão
During which troubleshooting step do you first use the schematic diagram?
Responda
  • Recognition
  • Verification
  • Analysis
  • Isolation

Questão 45

Questão
Which troubleshooting aid is designed to aid you if you see an unfamiliar symbol?
Responda
  • Zones
  • Schematic
  • Wiring diagram
  • Reference designation index

Questão 46

Questão
Which troubleshooting aid is designed to aid you in finding components on a diagram?
Responda
  • Zones
  • Schematic
  • Wiring diagram
  • Reference designation index

Questão 47

Questão
When used in a series circuit to measure voltage, how is a multimeter connected in the circuit?
Responda
  • In series
  • To ground
  • In parallel
  • In series-parallel

Questão 48

Questão
To set a value to the height of the oscilloscope grid markings, you adjust the
Responda
  • Focus
  • Pitch control
  • Voltage selector
  • Time sweep selector

Questão 49

Questão
To ensure accuracy of an oscilloscope when preparing for operation you should always,
Responda
  • Zero the display
  • Center the display
  • Identify the cal point and adjust to zero
  • Identify the cal point and calibrate the display

Questão 50

Questão
When you are testing a transformer, an open coil reading on the 8025A multimeter will be indicated by
Responda
  • A beep
  • An extending analog bar graph
  • OL
  • 0 ohms

Questão 51

Questão
Which could be the indication from the 8025A multimeter when you are checking a serviceable capacitor?
Responda
  • A beep
  • An extending analog bar graph
  • OL
  • 0 ohms

Questão 52

Questão
How many junctions are checked to test the serviceability of a transistor?
Responda
  • 1
  • 2
  • 3
  • 4

Questão 53

Questão
When checking a FET, you must check the diode junction and the continuity between the
Responda
  • Gate and source
  • Source and drain
  • Gate and substrate
  • Substrate and drain

Questão 54

Questão
How can you identify an electrostatic sensitive device?
Responda
  • 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.

Questão 55

Questão
A heat sink is used in soldering to
Responda
  • 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

Questão 56

Questão
A pitted or worn soldering iron tip should be redressed with a flat, fine, single-cut file and should be
Responda
  • Tinned
  • Clean of solder
  • Replaced
  • Checked for length

Questão 57

Questão
The first step in soldering a conductor is to
Responda
  • Wick the wire
  • Remove the insulation
  • Apply heat to the connection
  • Apply solder to the connection

Questão 58

Questão
When soldering flat perforated terminals, the conductor is connected to the terminal using
Responda
  • 90 degree wrap
  • 180 degree wrap
  • 270 degree wrap
  • 360 degree wrap

Questão 59

Questão
A wire is inserted into a solder cup until the
Responda
  • Wire touches the bottom
  • Wire clears the top of the cup
  • Insulation touches the cup
  • Wire protrudes from the weep hole

Questão 60

Questão
The best method of repairing a lifted circuit track on a PCB is to
Responda
  • Bond it
  • Glue it
  • Replace it with bare wire
  • Replace it with insulated wire

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