A&P GENERAL ORAL (ASA) EXAM
QUESTIONS & ANSWERS
What Constitutes A Capacitor? - Correct Answers -Two conductors separated by an
insulator.
What is the purpose of a capacitor? - Correct Answers -It stores energy in electrostatic
fields.
Does a capacitor in an AC circuit cause the current to lead or lag? - Correct Answers -It
causes the current to lead the voltage.
What is the basic unit of capacitance? - Correct Answers -The farad
Why should electrolytic capacitors not be used in an AC circuit? - Correct Answers -
They are polarized and will only pass current in one direction.
What is an example of an inductor used in a magneto? - Correct Answers -The coil
Does an inductor in an AC circuit cause the current to lead or lag the voltage? - Correct
Answers -It causes the current to lag behind the voltage.
How can you find the polarity of an electromagnet? - Correct Answers -Hold the magnet
in your left hand with your fingers encircling the coil in the directions electrons flow. The
direction your thumb is facing is the north pole.
What is meant by impedance? - Correct Answers -The total opposition to the flow of AC.
In what unit is impedance measured? - Correct Answers -Ohms
What are 5 sources of electrical energy? - Correct Answers -Magnetism, Heat,
Pressure, Chemical, & Light
What is the basic unit of power in a DC circuit? - Correct Answers -Watt.
What is meant by kilowatt? - Correct Answers -1,000 watts
What is meant by Megawatt? - Correct Answers -1,000,000 watts
What is the formula for power in a DC circuit? - Correct Answers -PIE / Power = Voltage
x Current (P=EI)
,What is the relationship between mechanical and electrical power? - Correct Answers -1
horsepower = 746 watts
What is meant by true power in an AC circuit? - Correct Answers -It is the product of
circuit voltage and the current in phase with it.
What unit is true power expressed? - Correct Answers -Watts
What is meant by apparent power in an AC circuit? - Correct Answers -The product of
circuit voltage and circuit current.
In what unit is apparent power expressed? - Correct Answers -Volt-Amps
What is meant by reactive power in an AC circuit? - Correct Answers -The power
consumed in the inductive & capacitive reactances in an AC circuit.
In what units is reactive power expressed? - Correct Answers -volt-amps reactive
(VAR), and kilovolt-amps reactive (KVAR)
What is meant by the power factor in an AC circuit? - Correct Answers -The ratio of true
power to apparent power.
Which law of electricity is the most important for an aircraft mechanic to know? - Correct
Answers -Ohms law.
what are the elements of Ohms law? - Correct Answers -voltage, current, resistance
(EIR)
What is voltage? - Correct Answers -Electrical pressure.
What is the basic unit of voltage? - Correct Answers -Volt.
What instrument is used to measure voltage? - Correct Answers -A voltmeter.
To measure voltage, is the voltmeter placed in series or in parallel with the source
voltage? - Correct Answers -In parallel.
What is electrical current? - Correct Answers -The flow of electrons in a circuit.
What is the basic unit of current flow? - Correct Answers -Amps.
What part of an amp is a milliamp? - Correct Answers -One thousandth of an amp.
What instrument is used to measure current flow? - Correct Answers -Ammeter.
, What two things happen when current flows through a conductor? - Correct Answers -
Heat is generated and an electromagnetic field surround the conductor.
To measure current through a component, is an ammeter placed in series or parallel
with the component? - Correct Answers -Series.
What is meant by resistance in an electrical circuit? - Correct Answers -The opposition
to the flow of electrons.
What is the basic unit of electrical resistance? - Correct Answers -Ohm.
What is a Megohm? - Correct Answers -1,000,000 Ohms.
What 4 things affect the resistance of an electrical conductor? - Correct Answers -
Length, Cross-sectional size, Temperature, and Material.
What is used to measure electrical resistance? - Correct Answers -Ohmmeter.
How can you tell the resistance of a composition resistor? - Correct Answers -Series of
color bands.
What is meant by continuity in an electrical circuit? - Correct Answers -The circuit is
complete when electrons can flow from one terminal of the power source to the other.
What instrument is used to measure continuity in an electrical circuit? - Correct Answers
-Ohmmeter.
When measuring resistance of a component with an Ohmmeter, should the circuit be
energized? - Correct Answers -No.
What three things must an electrical circuit contain? - Correct Answers -Power source,
load, and conductor.
What are three types of DC circuits with regard to the placement of various circuit
components? - Correct Answers -Series, Parallel, Series-parallel.
What is the name of the law that describes the relationship in an electrical circuit of
voltage, current, and resistance? - Correct Answers -Ohms law.
What is the basic equation of Ohms Law? - Correct Answers -E=I*R
What formula is used to find current when voltage & resistance are known? - Correct
Answers -I=E/R
What formula is used to find resistance when voltage and current are known? - Correct
Answers -R=E/I
QUESTIONS & ANSWERS
What Constitutes A Capacitor? - Correct Answers -Two conductors separated by an
insulator.
What is the purpose of a capacitor? - Correct Answers -It stores energy in electrostatic
fields.
Does a capacitor in an AC circuit cause the current to lead or lag? - Correct Answers -It
causes the current to lead the voltage.
What is the basic unit of capacitance? - Correct Answers -The farad
Why should electrolytic capacitors not be used in an AC circuit? - Correct Answers -
They are polarized and will only pass current in one direction.
What is an example of an inductor used in a magneto? - Correct Answers -The coil
Does an inductor in an AC circuit cause the current to lead or lag the voltage? - Correct
Answers -It causes the current to lag behind the voltage.
How can you find the polarity of an electromagnet? - Correct Answers -Hold the magnet
in your left hand with your fingers encircling the coil in the directions electrons flow. The
direction your thumb is facing is the north pole.
What is meant by impedance? - Correct Answers -The total opposition to the flow of AC.
In what unit is impedance measured? - Correct Answers -Ohms
What are 5 sources of electrical energy? - Correct Answers -Magnetism, Heat,
Pressure, Chemical, & Light
What is the basic unit of power in a DC circuit? - Correct Answers -Watt.
What is meant by kilowatt? - Correct Answers -1,000 watts
What is meant by Megawatt? - Correct Answers -1,000,000 watts
What is the formula for power in a DC circuit? - Correct Answers -PIE / Power = Voltage
x Current (P=EI)
,What is the relationship between mechanical and electrical power? - Correct Answers -1
horsepower = 746 watts
What is meant by true power in an AC circuit? - Correct Answers -It is the product of
circuit voltage and the current in phase with it.
What unit is true power expressed? - Correct Answers -Watts
What is meant by apparent power in an AC circuit? - Correct Answers -The product of
circuit voltage and circuit current.
In what unit is apparent power expressed? - Correct Answers -Volt-Amps
What is meant by reactive power in an AC circuit? - Correct Answers -The power
consumed in the inductive & capacitive reactances in an AC circuit.
In what units is reactive power expressed? - Correct Answers -volt-amps reactive
(VAR), and kilovolt-amps reactive (KVAR)
What is meant by the power factor in an AC circuit? - Correct Answers -The ratio of true
power to apparent power.
Which law of electricity is the most important for an aircraft mechanic to know? - Correct
Answers -Ohms law.
what are the elements of Ohms law? - Correct Answers -voltage, current, resistance
(EIR)
What is voltage? - Correct Answers -Electrical pressure.
What is the basic unit of voltage? - Correct Answers -Volt.
What instrument is used to measure voltage? - Correct Answers -A voltmeter.
To measure voltage, is the voltmeter placed in series or in parallel with the source
voltage? - Correct Answers -In parallel.
What is electrical current? - Correct Answers -The flow of electrons in a circuit.
What is the basic unit of current flow? - Correct Answers -Amps.
What part of an amp is a milliamp? - Correct Answers -One thousandth of an amp.
What instrument is used to measure current flow? - Correct Answers -Ammeter.
, What two things happen when current flows through a conductor? - Correct Answers -
Heat is generated and an electromagnetic field surround the conductor.
To measure current through a component, is an ammeter placed in series or parallel
with the component? - Correct Answers -Series.
What is meant by resistance in an electrical circuit? - Correct Answers -The opposition
to the flow of electrons.
What is the basic unit of electrical resistance? - Correct Answers -Ohm.
What is a Megohm? - Correct Answers -1,000,000 Ohms.
What 4 things affect the resistance of an electrical conductor? - Correct Answers -
Length, Cross-sectional size, Temperature, and Material.
What is used to measure electrical resistance? - Correct Answers -Ohmmeter.
How can you tell the resistance of a composition resistor? - Correct Answers -Series of
color bands.
What is meant by continuity in an electrical circuit? - Correct Answers -The circuit is
complete when electrons can flow from one terminal of the power source to the other.
What instrument is used to measure continuity in an electrical circuit? - Correct Answers
-Ohmmeter.
When measuring resistance of a component with an Ohmmeter, should the circuit be
energized? - Correct Answers -No.
What three things must an electrical circuit contain? - Correct Answers -Power source,
load, and conductor.
What are three types of DC circuits with regard to the placement of various circuit
components? - Correct Answers -Series, Parallel, Series-parallel.
What is the name of the law that describes the relationship in an electrical circuit of
voltage, current, and resistance? - Correct Answers -Ohms law.
What is the basic equation of Ohms Law? - Correct Answers -E=I*R
What formula is used to find current when voltage & resistance are known? - Correct
Answers -I=E/R
What formula is used to find resistance when voltage and current are known? - Correct
Answers -R=E/I
