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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 by nicilynn1981, updated more than 1 year ago
nicilynn1981
Created by nicilynn1981 over 8 years ago
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Resource summary

Question 1

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

Question 2

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

Question 3

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

Question 4

Question
"Dielectric" is the term used for
Answer
  • Conductors
  • Insulators
  • Doped atoms
  • Semi-conductors

Question 5

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

Question 6

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

Question 7

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

Question 8

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

Question 9

Question
Total current in a series circuit is equal to the
Answer
  • 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

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

Question 11

Question
In a parallel circuit, the total voltage is equal to the
Answer
  • 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

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

Question 13

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

Question 14

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

Question 15

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

Question 16

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

Question 17

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

Question 18

Question
The principle behind all electromechanical generation is
Answer
  • Conduction
  • Commutation
  • Rectification
  • Electromagnetic induction

Question 19

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

Question 20

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

Question 21

Question
An inductor stores energy in the form of
Answer
  • Heat
  • Resistance
  • A magnetic field
  • An electrostatic field

Question 22

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

Question 23

Question
A transformer will change all of the following except
Answer
  • Power
  • Current
  • Voltage
  • Resistance

Question 24

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

Question 25

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

Question 26

Question
A relay is an electrically operated
Answer
  • Meter
  • Motor
  • Switch
  • Safety device

Question 27

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

Question 28

Question
A capacitor stores energy in the form of
Answer
  • Heat
  • Resistance
  • A magnetic field
  • An electrostatic field

Question 29

Question
In a capacitor, the dielectric is the
Answer
  • Positive lead
  • Conductor
  • Insulator
  • Outer case

Question 30

Question
Opposition of a capacitor to AC is called
Answer
  • Inductive reactance
  • Impedance
  • Capactive reactance
  • Capacitance

Question 31

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

Question 32

Question
The anode of a diode is constructed of
Answer
  • Neutral material
  • Biased material
  • Positive material
  • Negative material

Question 33

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

Question 34

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

Question 35

Question
A zener will conduct in reverse bias
Answer
  • 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

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

Question 37

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

Question 38

Question
The SCR has how many PN junctions?
Answer
  • 1
  • 2
  • 3
  • 4

Question 39

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

Question 40

Question
In order for an SCR to be turned off
Answer
  • 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

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

Question 42

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

Question 43

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

Question 44

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

Question 45

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

Question 46

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

Question 47

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

Question 48

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

Question 49

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

Question 50

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

Question 51

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

Question 52

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

Question 53

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

Question 54

Question
How can you identify an electrostatic sensitive device?
Answer
  • 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

Question
A heat sink is used in soldering to
Answer
  • 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

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

Question 57

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

Question 58

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

Question 59

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

Question 60

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