# Aerospace Ground Equipment CDC Vol. 2

60 Questions | Total Attempts: 1053  Settings  This is from the latest updated CDC set (Change 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 the definition of
• 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 componenet

• C.

Reciprocal of the current through one componenet

• D.

Reciprocal of the sum of the current 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.

Risidual 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 through 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.

• 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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