3502516
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Quiz von nicilynn1981, aktualisiert more than 1 year ago
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Erstellt von nicilynn1981
vor etwa 9 Jahre
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Frage 1
Frage
Every atom must contain what types of particles?
Antworten
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Electrons and protons
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Electrons and neutrons
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Protons and neutrons
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Electrons, protons and neutrons
Frage 2
Frage
An atom with 8 electrons in its outermost shell is said to be
Antworten
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Free
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Stable
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Valence
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Ionized
Frage 3
Frage
How many valence electrons are needed to make a good conductor?
Antworten
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3
-
4
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5
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6
Frage 4
Frage
"Dielectric" is the term used for
Antworten
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Conductors
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Insulators
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Doped atoms
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Semi-conductors
Frage 5
Frage
The flow or drift of electrons through a conductor” in the same direction at the same time is the definition of
Antworten
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Conductivity
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Voltage
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Current
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Valence
Frage 6
Frage
The potential difference between two points in a circuit that exerts a force on free electrons is called
Antworten
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Conductivity
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Voltage
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Current
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Valence
Frage 7
Frage
What is used to control current flow in a circuit?
Antworten
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Voltage
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Coulombs
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Resistance
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Conductivity
Frage 8
Frage
The relationship of voltage, current and resistance is expressed through
Antworten
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E, I and C
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Power formulas
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Conductance
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Ohm's Law
Frage 9
Frage
Total current in a series circuit is equal to the
Antworten
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Current through one component
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Sum of the current through each component
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Reciprocal of the current through one component
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Reciprocal of the sum of the currents through each component
Frage 10
Frage
What is the wattage of a circuit with 28 volts applied and a total resistance of .2 ohms?
Antworten
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.14 watts (w)
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.14 kilowatts (kW)
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3.92 W
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3.92 kW
Frage 11
Frage
In a parallel circuit, the total voltage is equal to the
Antworten
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Sum of the voltages across each branch
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Voltage across each resistor
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Voltage across each branch
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The reciprocal of the voltage across the resistances
Frage 12
Frage
Source current in a parallel circuit will be divided according to branch
Antworten
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Voltage
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Powers
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Lengths
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Resistances
Frage 13
Frage
The area around a magnet where its influence can be felt is the definition of the
Antworten
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Saturation principle
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Magnetic theory
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Magnetic field
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Law of attraction and repulsion
Frage 14
Frage
“The ability of a material to pass lines of force” is a definition of
Antworten
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Permeability
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Reluctance
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Electromagnetism
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Retentively
Frage 15
Frage
The magnetism that remains after the magnetizing force has been removed is known as
Antworten
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Electromagnetism
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Molecular magnetism
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Permeability
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Residual magnetism
Frage 16
Frage
The magnetic field of an electromagnet can be varied by changing the
Antworten
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Type of core
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Number of turns in the coil
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Amount of current through the coil
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All of the above
Frage 17
Frage
The electromechanical generation of a voltage requires a magnetic field, relative motion, and
Antworten
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A complete circuit
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A conductor
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An insulator
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A load
Frage 18
Frage
The principle behind all electromechanical generation is
Antworten
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Conduction
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Commutation
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Rectification
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Electromagnetic induction
Frage 19
Frage
The function of the commutator in a DC generator is to
Antworten
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Complete the circuit to the load
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Induce DC into the external circuit
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Rectify the input
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Change AC voltage to DC voltage
Frage 20
Frage
Because an inductor stores energy and then returns it to the circuit, it is called a
Antworten
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Resistive device
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Reactive device
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Retentive device
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Retroactive device
Frage 21
Frage
An inductor stores energy in the form of
Antworten
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Heat
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Resistance
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A magnetic field
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An electrostatic field
Frage 22
Frage
The process by which a current change in one coil produces a voltage in another coil is called
Antworten
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Inductance
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Self-induction
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Mutual induction
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None of the above
Frage 23
Frage
A transformer will change all of the following except
Antworten
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Power
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Current
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Voltage
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Resistance
Frage 24
Frage
Normally, the winding of a transformer that is connected to a power source is known as the
Antworten
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Field winding
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Primary winding
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Current winding
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Secondary winding
Frage 25
Frage
What kind of turns of wire is found in the secondary windings of a step up transformer?
Antworten
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Equal
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Less
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More
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All of the above
Frage 26
Frage
A relay is an electrically operated
Antworten
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Meter
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Motor
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Switch
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Safety device
Frage 27
Frage
A relay that, once energized, requires a second coil to be energized before the contacts will return to their original positions is called a
Antworten
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Locking relay
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Latching relay
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Timing relay
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Tripping relay
Frage 28
Frage
A capacitor stores energy in the form of
Antworten
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Heat
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Resistance
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A magnetic field
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An electrostatic field
Frage 29
Frage
In a capacitor, the dielectric is the
Antworten
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Positive lead
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Conductor
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Insulator
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Outer case
Frage 30
Frage
Opposition of a capacitor to AC is called
Antworten
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Inductive reactance
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Impedance
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Capactive reactance
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Capacitance
Frage 31
Frage
The factors which determine the time required to charge a capacitor are the capacitance and the
Antworten
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Applied voltage
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Circuit current
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Amount of resistance
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Type of dielectric
Frage 32
Frage
The anode of a diode is constructed of
Antworten
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Neutral material
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Biased material
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Positive material
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Negative material
Frage 33
Frage
Expanding or contracting the depletion region of a diode is called
Antworten
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Basing
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Gating
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Spiking
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Biasing
Frage 34
Frage
A diode placed in a circuit in reverse bias is being used as
Antworten
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A spike protector
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An amplifier
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A regulator
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A rectifier
Frage 35
Frage
A zener will conduct in reverse bias
Antworten
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For a second or two at a time
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Until gate potential has been reached
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Once the avalanche point has been reached
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Until the breakdown point has been reached
Frage 36
Frage
A zener being used as a regulator must have a resistor placed in the circuit in
Antworten
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Series
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Parallel
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Reverse bias
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Series-parallel
Frage 37
Frage
What is the approximate operating voltage of a LED?
Antworten
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.5 volts
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.1 volt
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1.6 volts
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2.4 volts
Frage 38
Frage
The SCR has how many PN junctions?
Antworten
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1
-
2
-
3
-
4
Frage 39
Frage
The amount of current required to gate an SCR is called
Antworten
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Forward break over voltage
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Holding current
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Peak voltage
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Gate current
Frage 40
Frage
In order for an SCR to be turned off
Antworten
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The forward break over voltage must exceed the holding voltage.
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The current must drop below the holding current.
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The negative amp switch must activate.
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The negative volt switch must activate.
Frage 41
Frage
The best method of troubleshooting is the
Antworten
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Systematic method
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Instantaneous method
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Hit-and-miss method
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Trial-and-error method
Frage 42
Frage
Which troubleshooting step is done by knowing proper equipment operation?
Antworten
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Analysis
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Recognition
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Repair and check
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Elimination and isolation
Frage 43
Frage
During which troubleshooting step do you try to determine which system could cause the malfunction?
Antworten
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Analysis
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Verification
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Recognition
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Elimination and isolation
Frage 44
Frage
During which troubleshooting step do you first use the schematic diagram?
Antworten
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Recognition
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Verification
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Analysis
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Isolation
Frage 45
Frage
Which troubleshooting aid is designed to aid you if you see an unfamiliar symbol?
Antworten
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Zones
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Schematic
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Wiring diagram
-
Reference designation index
Frage 46
Frage
Which troubleshooting aid is designed to aid you in finding components on a diagram?
Antworten
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Zones
-
Schematic
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Wiring diagram
-
Reference designation index
Frage 47
Frage
When used in a series circuit to measure voltage, how is a multimeter connected in the circuit?
Antworten
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In series
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To ground
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In parallel
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In series-parallel
Frage 48
Frage
To set a value to the height of the oscilloscope grid markings, you adjust the
Antworten
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Focus
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Pitch control
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Voltage selector
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Time sweep selector
Frage 49
Frage
To ensure accuracy of an oscilloscope when preparing for operation you should always,
Antworten
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Zero the display
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Center the display
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Identify the cal point and adjust to zero
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Identify the cal point and calibrate the display
Frage 50
Frage
When you are testing a transformer, an open coil reading on the 8025A multimeter will be indicated by
Antworten
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A beep
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An extending analog bar graph
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OL
-
0 ohms
Frage 51
Frage
Which could be the indication from the 8025A multimeter when you are checking a serviceable capacitor?
Antworten
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A beep
-
An extending analog bar graph
-
OL
-
0 ohms
Frage 52
Frage
How many junctions are checked to test the serviceability of a transistor?
Antworten
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1
-
2
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3
-
4
Frage 53
Frage
When checking a FET, you must check the diode junction and the continuity between the
Antworten
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Gate and source
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Source and drain
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Gate and substrate
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Substrate and drain
Frage 54
Frage
How can you identify an electrostatic sensitive device?
Antworten
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The package will have special coloring as specified in local directives.
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The package will have a special control number as specified in local directives.
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It will be marked with the MIL-STD–129 symbol or a caution marking.
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It will be marked with the MIL-SPC–235 symbol or a warning marking.
Frage 55
Frage
A heat sink is used in soldering to
Antworten
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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
Frage 56
Frage
A pitted or worn soldering iron tip should be redressed with a flat, fine, single-cut file and should be
Antworten
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Tinned
-
Clean of solder
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Replaced
-
Checked for length
Frage 57
Frage
The first step in soldering a conductor is to
Antworten
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Wick the wire
-
Remove the insulation
-
Apply heat to the connection
-
Apply solder to the connection
Frage 58
Frage
When soldering flat perforated terminals, the conductor is connected to the terminal using
Antworten
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90 degree wrap
-
180 degree wrap
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270 degree wrap
-
360 degree wrap
Frage 59
Frage
A wire is inserted into a solder cup until the
Antworten
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Wire touches the bottom
-
Wire clears the top of the cup
-
Insulation touches the cup
-
Wire protrudes from the weep hole
Frage 60
Frage
The best method of repairing a lifted circuit track on a PCB is to
Antworten
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Bond it
-
Glue it
-
Replace it with bare wire
-
Replace it with insulated wire
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