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(AD) AVIATION MACHINIST MATE WEEK 2
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(AD) AVIATION MACHINIST MATE WEEK 2
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(AD) AVIATIONMACHINIST
MATE WEEK 2
Electricity - Answers-The physical phenomena arising from the existence and interaction
of an electrical charge
Voltage / Electromotive Force (EMF) - Answers-The amount of force being applied to a
circuit to produce an electron flow
Amperage / Current Flow - Answers-The quantity of electricity flowing through the circuit
Resistance - Answers-The opposition to the flow of electrons offered by a device or
material
Ohms - Answers-The measurement of resistance to current flow
Watt - Answers-The measurement of electrical work done
Forms of Electricity - Answers-Static and Dynamic
Static Electricity - Answers-(1) Electricity at rest
(2) Begins with a build up of either a positive or negative electron charge. If two
negative charges or two positive charges are brought close together, the objects that
hold that charge repel each other. If a positive charge is brought within close proximity
of a negative charge, the two objects attract each other
(3) Static electricity is produced by friction and is not easily measured nor is it
controllable or usable
, Dynamic Electricity - Answers-A practical form of current flow that is used in everyday
life. This form of electricity is easily produced, measured, and controlled
Methods of Producing Dynamic Electricity - Answers-Mechanical, Chemical, Thermal,
and Pressure
Mechanical - Answers-Produced by rotating a magnetic field through another magnetic
field
Ex: A Grass Cutter
Chemical - Answers-Produced by surrounding two or metallic plates with a chemical
electrolyte
Ex: A Battery
Thermal - Answers-Produced by joining two dissimilar metals and applying heat
Ex: Thermocouple
Pressure - Answers-Produced by applying pressure to quartz, which will produce an
electron flow
Ex: A Watch
Types of Electricity - Answers-AC and DC
Direct Current (DC) - Answers-Current that is a steady flow in one direction only. It is
produced mechanically by a DC generator, or chemically by a battery
Ex: A Flashlight
Alternating Current (AC) - Answers-Current flow that reverses direction at specific
intervals, defined as Hertz / Cycles. It is produced mechanically by an AC generator
Ex: A TV Screen
Electrical Test Equipment - Answers-Multimeter
Multimeter Test Leads - Answers-Red lead = Positive and Black lead = Negative
Multimeter Digital Display Features - Answers-Power Up, Overload Indication (OL), and
Low Battery Indicator
Power Up - Answers-All segments appear while the instrument performs a self-test. At
the end of the test, meter will chirp once indicating that it is ready for use
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