NCATT AET COMPREHENSIVE EXAM
QUESTIONS AND CORRECT ANSWERS
STUDY GUIDE
●● Battery
Answer: • A device consisting of a number of primary voltaic cells (cells
that cannot be recharged) or secondary cells (cells that can be recharged)
connected in series to obtain a desired DC voltage
• A battery stores chemical energy and converts the energy into electrical
form
• Aircraft storage batteries are generally rated at 12 or 24 volts
●● Capacitor
Answer: • Electrical device used to store charge and energy in the form
of an electrostatic field
• A capacitor is a device made of two parallel conductors separated by an
insulator
●● Conductor
Answer: • Common building block of electrical circuits that easily
permits the movement of electrons from an electrical source to a load
and back to the electrical source with a minimum of resistance.
• A conductor's resistance depends on such factors as cross sectional
area, length, temperature, and conductor material.
,●● Coulomb
Answer: • Basic unit of electrical quantity.
• A coulomb is equal to 6.28 billion - billion electrons (6.28 x 10 to the
18th)
●● Current
Answer: • The flow of electrons through a conductor is known as current
flow.
• The rate of current flow is measured in amperes.
●● Direct Current (DC)
Answer: • A flow of electrons in one direction throughout an electric
circuit with constant voltage and current.
• Direct current is caused by a constant difference of potential, both
negative and positive.
●● Electron
Answer: • Negatively charged subatomic particles that are located and
travel around (orbit) the nucleus in an imaginary sphere or shell at the
speed of light (186,000 miles/second)
• Electrons are involved in the conduction of electricity.
●● EMF (electromotive force)
,Answer: • The force that causes electrons to flow through a conductor.
• This force is abbreviated e.m.f.
• The unit of measurement for eletromotive force is the volt.
• In mathematical problems voltage is expressed by the letter "E".
●● Farad
Answer: • Basic unit of capacitance
• One farad holds one coulomb under a pressure of one volt.
●● Henry (H)
Answer: • Basic unit of measurement for inductance of an electrical coil
• One (1) henry is the inductance of a coil when a change of current of
one (1) ampere per second induces an e.m.f. of one (1) volt
• In mathematical problems inductance is expressed by the symbol "L".
●● Inductor
Answer: • Coil or other device used to introduce inductance into a
circuit.
• An inductor is a winding, or coiling, of multiple turns of wire
●● Insulator
Answer: • Material or device used to prevent the passage of heat,
electricity, or sound from one medium to another.
, ●● Left hand rule
Answer: • Refers to electrical
• This rule is for determining the direction of movement of a current -
carrying conductor in a magnetic field
●● Magnetic Permeability
Answer: • Measure of ease that lines of flux travel through a material
●● Magnetism
Answer: • Ability of a magnet to attract certain materials containing iron
and to influence electrons
• Magnetism is the principle way to effectively produce AC electricity
●● Metric Prefixes
Answer: • Measurements relating or using the metric system of
measurement
●● Neutron
Answer: • Neutral subatomic particles that exist within the nucleus of all
atoms
• Neutrons are not involved in the conduction of electricity
QUESTIONS AND CORRECT ANSWERS
STUDY GUIDE
●● Battery
Answer: • A device consisting of a number of primary voltaic cells (cells
that cannot be recharged) or secondary cells (cells that can be recharged)
connected in series to obtain a desired DC voltage
• A battery stores chemical energy and converts the energy into electrical
form
• Aircraft storage batteries are generally rated at 12 or 24 volts
●● Capacitor
Answer: • Electrical device used to store charge and energy in the form
of an electrostatic field
• A capacitor is a device made of two parallel conductors separated by an
insulator
●● Conductor
Answer: • Common building block of electrical circuits that easily
permits the movement of electrons from an electrical source to a load
and back to the electrical source with a minimum of resistance.
• A conductor's resistance depends on such factors as cross sectional
area, length, temperature, and conductor material.
,●● Coulomb
Answer: • Basic unit of electrical quantity.
• A coulomb is equal to 6.28 billion - billion electrons (6.28 x 10 to the
18th)
●● Current
Answer: • The flow of electrons through a conductor is known as current
flow.
• The rate of current flow is measured in amperes.
●● Direct Current (DC)
Answer: • A flow of electrons in one direction throughout an electric
circuit with constant voltage and current.
• Direct current is caused by a constant difference of potential, both
negative and positive.
●● Electron
Answer: • Negatively charged subatomic particles that are located and
travel around (orbit) the nucleus in an imaginary sphere or shell at the
speed of light (186,000 miles/second)
• Electrons are involved in the conduction of electricity.
●● EMF (electromotive force)
,Answer: • The force that causes electrons to flow through a conductor.
• This force is abbreviated e.m.f.
• The unit of measurement for eletromotive force is the volt.
• In mathematical problems voltage is expressed by the letter "E".
●● Farad
Answer: • Basic unit of capacitance
• One farad holds one coulomb under a pressure of one volt.
●● Henry (H)
Answer: • Basic unit of measurement for inductance of an electrical coil
• One (1) henry is the inductance of a coil when a change of current of
one (1) ampere per second induces an e.m.f. of one (1) volt
• In mathematical problems inductance is expressed by the symbol "L".
●● Inductor
Answer: • Coil or other device used to introduce inductance into a
circuit.
• An inductor is a winding, or coiling, of multiple turns of wire
●● Insulator
Answer: • Material or device used to prevent the passage of heat,
electricity, or sound from one medium to another.
, ●● Left hand rule
Answer: • Refers to electrical
• This rule is for determining the direction of movement of a current -
carrying conductor in a magnetic field
●● Magnetic Permeability
Answer: • Measure of ease that lines of flux travel through a material
●● Magnetism
Answer: • Ability of a magnet to attract certain materials containing iron
and to influence electrons
• Magnetism is the principle way to effectively produce AC electricity
●● Metric Prefixes
Answer: • Measurements relating or using the metric system of
measurement
●● Neutron
Answer: • Neutral subatomic particles that exist within the nucleus of all
atoms
• Neutrons are not involved in the conduction of electricity
