CDC 2A652 Vol. 2
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Aerospace Ground Equipment Journeyman Electrical and Electrical Circuits and Components. Edit Code 05.
- 1.Every atom must contain what types of particles?
- A.
Electrons and protons.
- B.
Electrons and neutrons.
- C.
Protons and neutrons.
- D.
Electrons, protons, and neutrons.
- 2.An atom with eight electrons in its outermost shell is said to be
- A.
Free.
- B.
Stable.
- C.
Valence.
- D.
Ionized.
- 3.How many valence electrons are needed to make a good conductor?
- A.
3.
- B.
4.
- C.
5.
- D.
6.
- 4."Dielectric" is the term used for
- A.
Conductors.
- B.
Insulators.
- C.
Doped atoms.
- D.
Semi-conductors.
- 5."The flow or drift of electrons through a conductor" in the same direction at the same time is
- A.
Conductivity.
- B.
Voltage.
- C.
Current.
- D.
Valence.
- 6.The potential difference between two points in a circuit that exerts a force on free electrons is called
- A.
Conductivity.
- B.
Voltage.
- C.
Current.
- D.
Valence.
- 7.What is used to control current flow in a circuit?
- A.
Voltage.
- B.
Coulombs.
- C.
Resistance.
- D.
Conductivity.
- 8.The relationship of voltage, current, and resistance is expressed through
- A.
E, I, and C.
- B.
Power formulas.
- C.
Conductance.
- D.
Ohm's Law.
- 9.Total current in a series circuit is equal to the
- A.
Current through one component.
- B.
Sum of the current through each component.
- C.
Reciprocal of the current through on component.
- D.
Reciprocal of the sum of the currents through each component.
- 10.What is the wattage of a circuit with 28 volts applied and a total resistance of .2 ohms?
- A.
.14 watts (w)
- B.
.14 kilowatts (kw)
- C.
3.92 w.
- D.
3.92 kw.
- 11.In a parallel circuit, the total voltage is equal to the
- A.
Sum of the voltages across each branch.
- B.
Voltage across each resistor.
- C.
Voltage across each branch.
- D.
The reciprocal of the voltage across the resistances.
- 12.Source current in a parallel circuit will be divided according to branch
- A.
Voltage.
- B.
Powers.
- C.
Lengths.
- D.
Resistances.
- 13.The area around a magnet where its influence can be felt is the definition of the
- A.
Saturation principle.
- B.
Magnetic theory.
- C.
Magnetic field.
- D.
Law of attraction and repulsion.
- 14."The ability of a material to pass lines of force" is a definition of
- A.
Permeability.
- B.
Reluctance.
- C.
Electromagnetism.
- D.
Retentivity.
- 15.The magnetism that remains after the magnetizing force has been removed is known as
- A.
Electromagnetism.
- B.
Molecular magnetism.
- C.
Permeability.
- D.
Residual magnetism.
- 16.The magnetic field of an electromagnet can be varied by changing the
- A.
Type of core.
- B.
Number of turns in the coil.
- C.
Amount of current in the coil.
- D.
All of the above.
- 17.The electromechanical generation of a voltage requires a magnetic field, relative motion, and
- A.
A complete circuit.
- B.
A conductor.
- C.
An insulator.
- D.
A load.
- 18.The principle behind all electromechanical generation is
- A.
Conduction.
- B.
Commutation.
- C.
Rectification.
- D.
Electromagnetic induction.
- 19.The function of the commutator in a DC generator is to
- A.
Complete the circuit to the load.
- B.
Induce DC into the external circuit.
- C.
Rectify the input.
- D.
Change AC voltage to DC voltage.
- 20.Because an inductor stores energy and then returns it to the circuit, it is called a
- A.
Resistive device.
- B.
Reactive device.
- C.
Retentive device.
- D.
Retroactive device.
- 21.An inductor stores energy in the form of
- A.
Heat.
- B.
Resistance.
- C.
A magnetic field.
- D.
An electrostatic field.
- 22.The process by which a current change in one coil produces a voltage in another coil is called
- A.
Inductance.
- B.
Self-induction.
- C.
Mutual induction.
- D.
None of the above.
- 23.A transformer will change all of the following except
- A.
Power.
- B.
Current.
- C.
Voltage.
- D.
Resistance.
- 24.Normally, the winding of a transformer that is connected to a power source is known as the
- A.
Field winding.
- B.
Primary winding.
- C.
Current winding.
- D.
Secondary winding.
- 25.What kind of turns of wire is found in the secondary windings of a step up transformer?
- A.
Equal.
- B.
Less.
- C.
More.
- D.
All of the above.
- 26.A relay is an electrically operated
- A.
Meter.
- B.
Motor.
- C.
Switch.
- D.
Safety device.
- 27.A relay that, once energized, requires a second coil to be energized before the contacts will return to their original positions is called
- A.
Locking relay.
- B.
Latching relay.
- C.
Timing relay.
- D.
Tripping relay.
- 28.A capacitor stores energy in the form of
- A.
Heat.
- B.
Resistance.
- C.
A magnetic field.
- D.
An electrostatic field.
- 29.In a capacitor, the dielectric is the
- A.
Positive lead.
- B.
Conductor.
- C.
Insulator.
- D.
Outer case.
- 30.Opposition of a capacitor to AC is called
- A.
Inductive reactance.
- B.
Impedance.
- C.
Capacitive reactance.
- D.
Capacitance.
- 31.The factors which determine the time required to charge a capacitor are the capacitance and the
- A.
Applied voltage.
- B.
Circuit current.
- C.
Amount of resistance.
- D.
Type of dielectric.
- 32.The anode of a diode is constructed of
- A.
Neutral material.
- B.
Biased material.
- C.
Positive material.
- D.
Negative material.
- 33.Expanding or contracting the depletion region of a diode is called
- A.
Basing.
- B.
Gating.
- C.
Spiking.
- D.
Biasing.
- 34.A diode placed in a circuit in reverse bias is being used as
- A.
A spike protector.
- B.
An amplifier.
- C.
A regulator.
- D.
A rectifier.
- 35.A zener will conduct in reverse bias
- A.
For a second or two at a time.
- B.
Until gate potential has been reached.
- C.
Once the avalanche point has bene reached.
- D.
Until the breakdown point has been reached.
- 36.A zener being used as a regulator must have a resistor placed in the circuit in
- A.
Series.
- B.
Parallel.
- C.
Reverse bias.
- D.
Series-parallel.
- 37.What is the approximate operating voltage of a LED?
- A.
.5 volts.
- B.
.1 volt.
- C.
1.6 volts.
- D.
2.4 volts.
- 38.The SCR has how many PN junctions?
- A.
One.
- B.
Two.
- C.
Three.
- D.
Four.
- 39.The amount of current required to gate an SCR is called
- A.
Forward breakover voltage.
- B.
Holding current.
- C.
Peak voltage.
- D.
Gate current.
- 40.In order for an SCR to be turned off
- A.
The forward breakover voltage must exceed the holding voltage.
- B.
The current must drop below the holding current.
- C.
The negative amp switch must activate.
- D.
The negative volt switch must activate.
- 41.The best method of troubleshooting is the
- A.
Systematic method.
- B.
Instantaneous method.
- C.
Hit-and-miss method.
- D.
Trial-and-error method.
- 42.Which troubleshooting step is done by knowing proper equipment operation?
- A.
Analysis.
- B.
Recognition.
- C.
Repair and check.
- D.
Elimination and isolation.
- 43.During which troubleshooting step do you try to determine which system could cause the malfunction?
- A.
Analysis.
- B.
Verification.
- C.
Recognition.
- D.
Elimination and isolation.
- 44.During which troubleshooting step do your first use the schematic diagram?
- A.
Recognition.
- B.
Verification.
- C.
Analysis.
- D.
Isolation.
- 45.Which troubleshooting aid is designed to aid you if you see an unfamiliar symbol?
- A.
Zones.
- B.
Schematic.
- C.
Wiring diagram.
- D.
Reference designation index.
- 46.Which troubleshooting aid is designed to aid you in finding components in a diagram?
- A.
Zones.
- B.
Schematic.
- C.
Wiring diagram.
- D.
Reference designation index.
- 47.When used in a series circuit to measure voltage, how is a multimeter connected in the circuit?
- A.
In series.
- B.
To ground.
- C.
In parallel.
- D.
In series-parallel.
- 48.To set a value to the height of the oscilloscope grid markings, you adjust the
- A.
Focus.
- B.
Pitch control.
- C.
Voltage selector.
- D.
Time sweep selector.
- 49.To ensure accuracy of an oscilloscope when preparing for operation you should always,
- A.
Zero the display.
- B.
Center the display.
- C.
Identify the cal point and adjust to zero.
- D.
Identify the cal point and calibrate the display.
- 50.When you are testing a transformer, an open coil reading on the 8025A multimeter will be indicated by
- A.
A beep.
- B.
An extending analog bar graph.
- C.
OL.
- D.
0 ohms.
- 51.Which could be the indication from the 8025A multimeter when you are checking a serviceable capacitor?
- A.
A beep.
- B.
An extending analog bar graph.
- C.
OL.
- D.
0 ohms.
- 52.How many junctions are checked to test the serviceability of a transistor?
- A.
1.
- B.
2.
- C.
3.
- D.
4.
- 53.When checking a FET, you must check the diode junction and the continuity between the
- A.
Gate and source.
- B.
Source and drain.
- C.
Gate and substrate.
- D.
Substrate and drain.
- 54.How can you identify an electrostatic sensitive device?
- A.
The package will have special coloring as specified in local directives.
- B.
The package will have a special control number as specified in local directives.
- C.
It will be marked with the MIL-STD-129 symbol or a caution marking.
- D.
It will be marked with the MIL-SPC-235 symbol or a warning marking.
- 55.A heat sink is used in soldering to
- A.
Prevent heat from damaging the component being soldered.
- B.
Prevent heat from damaging other components in the circuit.
- C.
Apply heat to the component being soldered.
- D.
Apply heat to other components in the circuit.
- 56.A pitted or worn soldering iron tip should be redressed with a flat, fine, single-cut file and should be
- A.
Tinned.
- B.
Clean of solder.
- C.
Replaced.
- D.
Checked for length.
- 57.The first step in soldering a conductor is to
- A.
Wick the wire.
- B.
Removed the insulation.
- C.
Apply heat to the connection.
- D.
Apply solder to the connection.
- 58.When soldering flat perforated terminals, the conductor is connected to the terminal using a
- A.
90 degree wrap.
- B.
180 degree wrap.
- C.
270 degree wrap.
- D.
360 degree wrap.
- 59.A wire is inserted into a solder cup until the
- A.
Wire touches the bottom.
- B.
Wire clears the top of the cup.
- C.
Insulation touches the cup.
- D.
Wire protrudes from the weep hole.
- 60.The best method of repairing a lifted circuit track on a PCB is to
- A.
Bond it.
- B.
Glue it.
- C.
Replace it with bare wire.
- D.
Replace it with insulated wire.
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