ELECTRICAL ENGINEERING :A&P ORAL & PRACTICAL
STUDY GUIDE QUESTIONS AND ANSWERS GUARANTEED
SUCCESS
Ohm 's Law ( I = E ÷ R ) Current = Voltage ÷ Resistance .
What is the most important law applicable to the study of electricity ?
Voltage (E), Current (I), and Resistance (R).
What are the elements of Ohm's Law ?
Mechanical (generator ), Chemical ( battery ), Photoelectric ( light), and Thermal Heat.
What are the sources of electrical power ?
A capacitor (condenser ).
What represents capacitance in an AC circuit?
To store electricity
What is the function of a capacitor ?
,A voltage that is induced in a coil in an AC circuit. The voltage is opposite in direction
the applied voltage, and opposes any change in alternating current.
What is inductance ?
A voltage that is induced in a coil in an AC circuit. The voltage is opposite in direction
the applied voltage, and opposes any change in alternating current. It is the combined
effect of resistance, inductive reactance, and capacitive reactance in an AC circuit.
What is impedance ?
The watt. Ampres times volts equals watts (P= IXE) .746 watts equals one horsepower
What is the unit of measurement of power in a DC circuit?
What is a kilowatt ?
It is 1000 watts.
They are series circuits, parallel circuits and series parallel circuits.
What are the three types of electrical circuits?
It has 12 cells. Each cell is rated at 2 volts.
A 24 volt lead-acid battery has how many cells?
It should be between 1.275 and 1.300
, What should be the specific gravity of the electrolyte in a fully charged lead acid battery
?
A Hydrometer (Sulfuric Acid + H20).
What instrument is used to determine the specific gravity of electrolyte in a lead acid
battery ?
Adjustments must be made if temperature of the electrolyte is above 90°F or below
70°F. ( Average 80°F)
When using a hydrometer to check the charge of a lead-acid battery, at what
temperatures must a correction factor be applied to the reading?
It should be approximately 3/8 inches above the plates. If the battery has baffle plates
above the cell plates, the electrolyte level should be up to the hole in the baffle plate in
each cell.
What should be the correct electrolyte level in a properly serviced battery ?
This is when two or more generators are operated at the same time to supply power for
a load that must be shared equally.
What are paralleling generators?
It is a breaker that cannot be reset while in flight.
Describe a no-trip circuit breaker ( trip-free)
STUDY GUIDE QUESTIONS AND ANSWERS GUARANTEED
SUCCESS
Ohm 's Law ( I = E ÷ R ) Current = Voltage ÷ Resistance .
What is the most important law applicable to the study of electricity ?
Voltage (E), Current (I), and Resistance (R).
What are the elements of Ohm's Law ?
Mechanical (generator ), Chemical ( battery ), Photoelectric ( light), and Thermal Heat.
What are the sources of electrical power ?
A capacitor (condenser ).
What represents capacitance in an AC circuit?
To store electricity
What is the function of a capacitor ?
,A voltage that is induced in a coil in an AC circuit. The voltage is opposite in direction
the applied voltage, and opposes any change in alternating current.
What is inductance ?
A voltage that is induced in a coil in an AC circuit. The voltage is opposite in direction
the applied voltage, and opposes any change in alternating current. It is the combined
effect of resistance, inductive reactance, and capacitive reactance in an AC circuit.
What is impedance ?
The watt. Ampres times volts equals watts (P= IXE) .746 watts equals one horsepower
What is the unit of measurement of power in a DC circuit?
What is a kilowatt ?
It is 1000 watts.
They are series circuits, parallel circuits and series parallel circuits.
What are the three types of electrical circuits?
It has 12 cells. Each cell is rated at 2 volts.
A 24 volt lead-acid battery has how many cells?
It should be between 1.275 and 1.300
, What should be the specific gravity of the electrolyte in a fully charged lead acid battery
?
A Hydrometer (Sulfuric Acid + H20).
What instrument is used to determine the specific gravity of electrolyte in a lead acid
battery ?
Adjustments must be made if temperature of the electrolyte is above 90°F or below
70°F. ( Average 80°F)
When using a hydrometer to check the charge of a lead-acid battery, at what
temperatures must a correction factor be applied to the reading?
It should be approximately 3/8 inches above the plates. If the battery has baffle plates
above the cell plates, the electrolyte level should be up to the hole in the baffle plate in
each cell.
What should be the correct electrolyte level in a properly serviced battery ?
This is when two or more generators are operated at the same time to supply power for
a load that must be shared equally.
What are paralleling generators?
It is a breaker that cannot be reset while in flight.
Describe a no-trip circuit breaker ( trip-free)
