AET NCATT Questions with CORRECT Answers

AET NCATT Questions with CORRECT Answers

Question:
Ampere ( A, amp, amperage)
Answer:
• Unit of measurement used to express the flow of electrons (electrical
current)


Question:
• One ampere is a rate of flow of one coulomb (6.28 billion
Answer:
billion electrons) passing a given point in an electrical circuit per second


Question:
• In mathematical problems amperage is expressed by the letter "I"
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


Question:
• 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


Question:
• 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.

,Question:
• A conductor's resistance depends on such factors as cross sectional area, length,
temperature, and conductor material. Coulomb
Answer:
• Basic unit of electrical quantity.


Question:
• A coulomb is equal to 6.28 billion
Answer:
billion electrons (6.28 x 10 to the 18th)


Question:
Current
Answer:
• The flow of electrons through a conductor is known as current flow.


Question:
• 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.


Question:
• 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)


Question:
• Electrons are involved in the conduction of electricity.
EMF (electromotive force)
Answer:
• The force that causes electrons to flow through a conductor.

,Question:
• 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


Question:
• One farad holds one coulomb under a pressure of one volt.
Henry (H)
Answer:
• Basic unit of measurement for inductance of an electrical coil


Question:
• 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.


Question:
• 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.


Question:
Left hand rule
Answer:
• Refers to electrical

, Question:
• This rule is for determining the direction of movement of a current
Answer:
carrying conductor in a magnetic field


Question:
Magnetic Permeability
Answer:
• Measure of ease that lines of flux travel through a material


Question:
Magnetism
Answer:
• Ability of a magnet to attract certain materials containing iron and to influence
electrons


Question:
• Magnetism is the principle way to effectively produce AC electricity
Metric Prefixes
Answer:
• Measurements relating or using the metric system of measurement


Question:
Neutron
Answer:
• Neutral subatomic particles that exist within the nucleus of all atoms


Question:
• Neutrons are not involved in the conduction of electricity
Ohm
Answer:
• Unit of electrical opposition to the flow of current