Basic electricity
The standard rating used to specify battery capacity in the ______ rating.
5 hour
AC power used in most aircraft is _______ hertz.
400
The working voltage of a capacitor is rated in ______ volts.
DC
According to Ohms Law, if the resistance increases current will:
Decrease
Increasing the inductance of a coil will_____ the amount of AC that can flow through it.
Decrease
Capacitive reactance ______ as the frequency of the circuit increases.
Decreases
Total reactance is the _____ between inductive reactance and capacitive reactance.
Difference
Another name for the RMS value of AC is the______ value.
Effective
The state of charge of a lead acid battery is determined by measuring the
Electrolyte
When large amounts of capacity is needed with low working voltage a _____ capacitor is used.
Electrolytic
Electrical energy is stored in a capacitor in _____ fields.
Electrostatic
In a purely inductive circuit, the current _____ the voltage.
Lags
me most commonly used storage battery in light aircraft is the _____ battery
Lead acid
The 5 - minute discharge rate of a lead acid battery gives ______ ampere-hours than the 5 - hour rate
Less
The total resistance in a parallel circuit is than the resistance of any of the paths.
Less
The specific gravity of a lead acid battery is checked with a:
Hydrometer
A charged atom is known as a?
ION
The opposition to current flow in a conductor caused by the generation of a back voitage as the magnetic field cuts across the conductor is called:
Inductive reactance
When electrons flow in a conductor, they cause a to surround the conductor,
Magnetic Field
In an AC circuit the product of the voltage and the current is known as:
Apparent power
The source current is ______ in a parallel RCL circuit at its resonant frequency.
Minimum
A capacitor with a thin dielectric has _____ capacity than the same capacitor with a thick dielectric.
More
Current flow is______ in a series RCL circuit at resonant frequency.
Maximum
Mis the metric prefix for:
Mega
The wave form of alternating current produced by a rotating generator is called a______ wave.
Sine
The total resistance in a series circuit is the of the individual load resistances,
Sum
Nickel - cadmium battery installations are required to have monitoring equipment.
Temp
factor must be considered to accurately determine the specific gravity of the electrolyte in a lead What acid battery?
Temperature
The unit of electrical pressure is known as the
Volt
A nickel - cadmium battery can maintain a nearly constant ______ until it is almost totally discharged.
Voltage
The generating system in an aircraft utilizes the constant ______ method to charge a battery.
Voltage
The remains the same across any of the paths in a parallel circuit.
Voltage
A battery is a device which changes _____ energy to ______ energy.
Chemical, Electrical
Rheostats are:
Variable resistors
Which wire gage has the smallest diameter?
20
The average value of alternating current is calculated by multiplying ______ by the peal value,
.637
The RMS value of AC is_____ times the peak value,
.707
Inductance opposes a change in current by generation of a:
Back Voltage
Spiled electrolyte from a lead acid battery may be neutralized using a solution of _______ and water.
Baking soda
Spilled nickel cadmium electrolyte can be neutralized with?
Boric acid
A primary cell _____ be recharged.
Cant
Inductance is measured in:
Henrys
"The algebraic sum of the currents at any junction of conductors in a circuit is zero". This statement refers to:
Kirchhoffs Current Law
The standard unit of electrical resistance is the
Ohm
The formulas for finding total series capacitance are the same as those used for finding the total resistance of resistors connected in
Parallel
Which is the most widely used circuit arrangement?
Parallel
The maximum value of voltage in either the positive or negative direction is known as the ______ voltage.
Peak
What formula may be used to find the total resistance in a parallel circuit if all of the resistors are the same value?
R total = R1/R2
A________may be used to convert alternating current to direct current.
Rectifier
The magnetism remaining in a material after the magnetizing force has been removed is called?
Residual Magnetism
Two ways to connect the three windings of a three-phase AC generator are:
Y & Delta
The open circuit voltage of a lead acid battery cell is approximately _____ volts.
2.1
How much current will flow in a 24 volt circuit with a 60 watt light bulb?
2.5 amps
The third band on a 4 band resistor indicates the:
Multiplier
A purely resistive circuit has a power factor of:
1
The specific gravity of a fully charged lead acid battery cell is approximately
1.275
When a 5 ohm resistor is placed in a 20 volt series circuit, how much current will flow?
4 amps
It3 amps of current is flowing in a 12 volt series circuit, how much resistance is present?
4 ohms
What is the likely result of servicing and charging nikel cadmium and lead acid batteries together in the same service area?
Cross contamination
If it becomes necessary to dilute acide to make electrolyte, it is extremely import that you always add the ____ to the ____ and never the other way around.
Acid, water
Static dischargers will dissipate a static charge from a control surface into the
Air
When one Coulomb of electrons flow past a point in one second, there is a current of one
Amp
Battery capacity is measured in:
Amp/hour
In a series circuit the is the same throughout the circuit.
Current
The epposition to the flow of alternating current caused by a capacitor in a circuit is known
Capacitive Reactance
Phase angle is the angle whose_____ is the power factor.
Cosine
A circular mil is the standard measurement of a round conductors
Cross Sectional Area
The electrolyte of a nickel cadmium battery is highest when the battery is:
Fully charged
The total opposition to the flow of alternating current is called:
Impedance
According to Ohms Law if the voltage increases the current will:
Increase
As the temperature increases in a material that has a positive temperature coefficient the resistance will:
Increase
If the cross sectional area of a conductor is decreased the resistance will:
Increase
If the length of a conductor is increased, the resistance will
Increase
Inductive reactance _____ as the frequency increases.
Increases
Materials which permit the flow of electrons are referred to as
Insulators
"The algebraic sum of the applied voltage and the voltage drop around any closed circuit is equal to zero". This statement refers to:
Kirchhoffs Voltage Law
A body having an accumulation of electrons on its surface is said to have a _____ static charge
Negative
An atom having more electrons than profons will carry a _____ charge.
Negative
When installing a battery in an aircraft, you should connect the _____ lead first.
Negative
When removing a battery from an aircraft, you should remove the _____ lead first.
Negative
The strength of an electromagnet is determined by the _____ and the amount of current flowing through it.
Number of turns
Inductive reactance is measured in:
Ohms
The reference dielectric is air, which has a dielectric constant of:
One
If there is an interruption or break in an electrical circuit, it is said to be:
Open
The maximum difference between the positive and negative peak values of alternating voltage or current is called the _____ value.
Peak to Peak
The ease with which lines of magnetic flux can pass through a material is known as a materials:
Permeability
The time required for one cycle of events to occur is known as the _____ of alternating current.
Peroid
A capacitor consists of two _____ separated by a ______
Plates, Dielectric
The electrolyte for a nickel-cadmium battery is _______ and water.
Potassium Hydroxide
The ratio between the true power and the apparent power in an AC circuit is known as the:
Power Factor
If there is only one path for electrons to flow, the circuit is called a ____ circuit
Series
Complex DC circuits consist of _____and ___ circuits
Series and Paralel Circuits
If there is a path from one terminal of the source to the other without passing through the load, the circuit is said to be
Shorted
The sum of all the voltage drops in a series circuit is equal to the
Source voltage
High charging currents in nickel cadmium batteries may cause a breakdown of the cellophane like separator material, resulting in a condition known as:
Thermal runaway
The ______ each of the individual load resistances. dissipated in a series circuit is equal to the sum of the power dissipated in
Total power
A _____ is used to step up or step down an AC voltage.
Transformer
The two methods for charging a battery are the constant _____ and the constant _____ method.
Voltage, current
Electrical power is expressed in
Watts
True power in an AC circuit is expressed in terms of:
Watts
