CDC 2A652 Vol. 2
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.
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