NCATT AET TEST STUDY GUIDE PRACTICE
QUESTIONS WITH UPDATED ANSWERS
What part of an atom is associated with the flow of electricity? - Answer-Electrons
/.What in electrons in a conductor determines whether its flow is poor or good? -
Answer-Whether or not there contain free electrons in the orbit of atoms
/.Define Static Electricity. - Answer-a difference of electrical charge between two non-
conductive surfaces
/.What term is used to express the flow of electricity? - Answer-Amperes is the amount
of current flowing in a circuit
/.What is a coulomb? - Answer-a basic unit of electrical quantity equal to 6.28 x 10^18
or 6.28 billion billion electrons
/.What is the basic unit of electrical pressure? What other names could it go by? -
Answer-Electron Motive Force (EMF) or Volts
/.If voltage and resistance are known, describe how total current can be determined.
Show the equation. - Answer-To determine the current in a circuit, the voltage is divided
by the resistance. I=V/R
/.What device other than an actual battery can be used to store energy? - Answer-A
capacitor
/.Describe the left hand rule as it pertains to electrical generation. - Answer-This
describes the flow of current in a conductor when passed through magnetic lines of flux.
Thumb represents motion of conductor, index finger represents line of flux of magnetic
field, middle finger is resultant current flow.
/.What trait would allow magnetic lines of flux to flow easily? - Answer-the permeability
of the material that the lines of flux flow through
/.Describe the name of a common electrical point that allows circuits to have a return
path to power. - Answer-earth or chassis ground
/.What is the result of passing too much current (amps) in a small gauge wire? -
Answer-a larger amount of resistance will slow the rate of current flow
/.Describe the relationship of voltage, current, and resistance described in Ohms law. -
Answer-the electrical pressure of 1 volt is equal to the flow of 1 amp of current times the
resistance of 1 ohm
, /.How much work can be achieved with one watt of energy? - Answer-1 watt = 1/746th
of horsepower
/.Describe what current does in a series circuit. - Answer-The flow of current is common
across all resistance loads around the circuit.
/.How is voltage distributed in a parallel circuit? - Answer-voltage is equal to the
branches while current will be cumulative of each branch
/.Describe the rule for current and magnetism for the left hand rule for generators -
Answer-thumb = direction of motion conductor, index finger = the direction of magnetic
field, middle finger = the resultant of current flow
/.What large difference of electrical potential has no useful purpose in aviation? -
Answer-Static electricity
/.What is the property called when lines of magnetic flux travel freely through a
material? - Answer-only materials with HIGH PERMEABILITY will pass lines of
magnetic flux
/.What is basic unit of measure for capacitor? - Answer-Farads
/.Which type of battery cannot be recharged in a circuit? - Answer-primary cannot be
recharged, secondary can
/.Formula for resistors in series: - Answer-Rtot = R1 + R2 +R3 +...
/.Formula for two resistors of the same value in parallel: - Answer-Rtot=R/n
/.Formula for two resistors of different value in parallel: - Answer-Rtot= R1 x R2/R1 + R2
/.Formula for more than two resistors of a different value in parallel: - Answer-Rtot=
1/(1/R1)+(1/R2)+(1/R3)+...
/.Formula for capacitors in parallel: - Answer-Ctot=C1+C2+C3...
/.Formula for capacitors of the same value in series: - Answer-Ctot=C/n
/.Formula for two capacitors of different value in series: - Answer-Ctot= C1 x C2/ C1 +
C2
/.Formula for more than two capacitors of different value in series: - Answer-Ctot=
1/(1/C1)+(1/C2)+(1/C3)+...
/.Formula for Capacitive Reactance: - Answer-Xc = 1/2πfC
QUESTIONS WITH UPDATED ANSWERS
What part of an atom is associated with the flow of electricity? - Answer-Electrons
/.What in electrons in a conductor determines whether its flow is poor or good? -
Answer-Whether or not there contain free electrons in the orbit of atoms
/.Define Static Electricity. - Answer-a difference of electrical charge between two non-
conductive surfaces
/.What term is used to express the flow of electricity? - Answer-Amperes is the amount
of current flowing in a circuit
/.What is a coulomb? - Answer-a basic unit of electrical quantity equal to 6.28 x 10^18
or 6.28 billion billion electrons
/.What is the basic unit of electrical pressure? What other names could it go by? -
Answer-Electron Motive Force (EMF) or Volts
/.If voltage and resistance are known, describe how total current can be determined.
Show the equation. - Answer-To determine the current in a circuit, the voltage is divided
by the resistance. I=V/R
/.What device other than an actual battery can be used to store energy? - Answer-A
capacitor
/.Describe the left hand rule as it pertains to electrical generation. - Answer-This
describes the flow of current in a conductor when passed through magnetic lines of flux.
Thumb represents motion of conductor, index finger represents line of flux of magnetic
field, middle finger is resultant current flow.
/.What trait would allow magnetic lines of flux to flow easily? - Answer-the permeability
of the material that the lines of flux flow through
/.Describe the name of a common electrical point that allows circuits to have a return
path to power. - Answer-earth or chassis ground
/.What is the result of passing too much current (amps) in a small gauge wire? -
Answer-a larger amount of resistance will slow the rate of current flow
/.Describe the relationship of voltage, current, and resistance described in Ohms law. -
Answer-the electrical pressure of 1 volt is equal to the flow of 1 amp of current times the
resistance of 1 ohm
, /.How much work can be achieved with one watt of energy? - Answer-1 watt = 1/746th
of horsepower
/.Describe what current does in a series circuit. - Answer-The flow of current is common
across all resistance loads around the circuit.
/.How is voltage distributed in a parallel circuit? - Answer-voltage is equal to the
branches while current will be cumulative of each branch
/.Describe the rule for current and magnetism for the left hand rule for generators -
Answer-thumb = direction of motion conductor, index finger = the direction of magnetic
field, middle finger = the resultant of current flow
/.What large difference of electrical potential has no useful purpose in aviation? -
Answer-Static electricity
/.What is the property called when lines of magnetic flux travel freely through a
material? - Answer-only materials with HIGH PERMEABILITY will pass lines of
magnetic flux
/.What is basic unit of measure for capacitor? - Answer-Farads
/.Which type of battery cannot be recharged in a circuit? - Answer-primary cannot be
recharged, secondary can
/.Formula for resistors in series: - Answer-Rtot = R1 + R2 +R3 +...
/.Formula for two resistors of the same value in parallel: - Answer-Rtot=R/n
/.Formula for two resistors of different value in parallel: - Answer-Rtot= R1 x R2/R1 + R2
/.Formula for more than two resistors of a different value in parallel: - Answer-Rtot=
1/(1/R1)+(1/R2)+(1/R3)+...
/.Formula for capacitors in parallel: - Answer-Ctot=C1+C2+C3...
/.Formula for capacitors of the same value in series: - Answer-Ctot=C/n
/.Formula for two capacitors of different value in series: - Answer-Ctot= C1 x C2/ C1 +
C2
/.Formula for more than two capacitors of different value in series: - Answer-Ctot=
1/(1/C1)+(1/C2)+(1/C3)+...
/.Formula for Capacitive Reactance: - Answer-Xc = 1/2πfC
