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