chapter 3 section A-C

What formula may be used to find the total resistance in a parallel circuit if all of the resistances are the same?

Rt = R/N

The constant _____ charging method is the most effective method for charging aircraft batteries.

current

Materials which oppose the movement of electrons are called

insulators

The device used to change DC to AC is the ______

inverter

A charged atom is known as an

ion

How much power is needed to life a 12,000-pound aircraft three feet in one minute?

1.09 horsepower 813.8 watts

The specific gravity of a fully charged lead-acid battery is approximately _______

1.275

The speed of electron movement is considered to be ____ miles per second. This is the same speed of _____

186,000 , light

The open circuit voltage of a lead-acid battery is approximately ______ volts

2.1

A DPDT switch will control _____ circuits, and it has either _____ or _____ positions

83, 101, less

Each unit of electrical measurement may be expressed using a single letter. What letters are used for the expressions below?

Voltage: E Current: I Resistance: R Power: P

Name 5 ways electrical energy may be generated

a. Magnetism b. Chemical c. Thermal d. Pressure e. Light

The ampere-hour capacity of a lead-acid battery is determined by:

a. amount of active material b. area of the plates c. amount of electrolyte d. temperature

The resistance of a conductor is affected by what three factors?

a. physical characteristics b. dimensions c. temperature

Name the three components needed to complete an electrical circuit

a. source b. load c. conductors

Aircraft circuit breakers may operate on what two principles?

a. thermal b. magnetic

Static dischargers on an aircraft control surface provide sharp points from which a static charge can be dissipated from the control surface into the _____

air

When one coulomb of electrons flows past a point in one second, there is a current flow of one ____

ampere

Spilled electrolyte from a lead-acid battery may be neutralized using a solution of ______ ____ and water_.

baking soda

If water is added to any cell of a nickel cadmium battery, the amount and location of the cell should be recorded in the _____ ____ ____

battery service record

Flexible metal braids called _____ straps connect the control surfaces to the aircraft structure to prevent the buildup of static charges

bonding

The negative plates of a nickel-cadmium cell are impregnated with ______ hydroxide

cadmium

A primary cell ____ be recharged.

cannot

A battery is a device which changes _____ energy to ________ energy

chemical, electrical

Using a soft iron core in an electromagnet increases its strength because it _____ the lines of flux

concentrates

Materials which permit the flow of electrons are referred to as

conductors

The ______ is the basic unit of electrical quantity and is equal to 6.28 billion, billion electrons.

coulomb

In a series circuit, the _____ is the same throughout the circuit.

current

The capacity of a battery is its ability to produce a given amount of _____ for a specified time

current

If the capacity of a nickel-cadmium battery is less than it should be, or if there is an indication that some of the cells are unbalanced, the battery should be ____ ____

deep cycled

The specific gravity of the electrolyte in a nickel-cadmium battery ______ change as the state of charge of the battery changes.

does not

There are two types of electromagnets used in practical applications, those having _____ cores and those having _____ cores

fixed, movable

One _____ represents a magnetic flex density of one maxwell per square centimeter.

gauss

The electrolyte level of a nickel-cadmium battery is ______ immediately after the battery charge is complete

highest

A material is said to have a positive temperature coefficient of resistance if its resistance _______ as its temperature increases

increases

_____ ________ is the magnetism remaining in a material after the magnetizing force has been removed

residual magnetism

The active material on the positive plate of a fully charged lead-acid battery is _____ ____

lead peroxide

When a lead-acid battery is discharged, the active material on both positive and negative plates is converted to ______ _____

lead sulfate

The most commonly used storage battery in light aircrraft is the _____ battery.

lead-acid

The five-minute discharge rate of a lead-acid battery gives _____ ampere-hours than the five-hour rate?

less

The total resistance of a parallel circuit is ______ than the resistance of any of the paths

less

When electrons flow in a conductor, they cause an ______ to surround the conductor

magnetic field

During the service of a nickel-cadmium battery, the electrical leakage between the cells and the case should be checked using a _______

milliammeter

A body having an accumulation of electrons on its surface is said to have a ______ static charge.

negative

An atom having more electrons than protons will carry a ______ charge

negative

When removing a battery from an aircraft, you should remove the _____ lead first

negative

Electron flow is considered to be from the _______ terminal of the battery, through the circuit, and return to the _____ terminal of the battery.

negative, positive

The positive plates of a nickel-cadmium cell are impregnated with _______ hydroxide.

nickel

The lines of magnetic flux are considered to leave the _____ pole of a magnet and enter at the _____ pole

north, south

The strength of an electromagnet is determined by the _____ and by the _____ flowing through it

number of turns, amount of current

The _____ is the standard unit of electrical resistance, or opposition of current flow

ohm

If there is an interruption, or break, in an electrical circuit, is is said to be ______

open

The ______ is capable of changing DC to AC using electronics

oscillator

The most widely used circuit arrangement is the _______ circuit

parallel

The ease with which lines of magnetic flex can pass through a material is known as a material's ________

permeability

An atom having fewer electrons than protons will carry a ______ charge

positive

When installing a battery in an aircraft, you should correct the _____ lead first.

positive

The white powder that forms on the top of a nickel-cadmium battery that has been in service is _____ _____ _____

potassium carbonate

The electrolyte level of a nickel-cadmium battery is _______ ______ and water

potassium hydroxide

A ________ may be used as a voltage divider.

potentiometer

A variable resistor having three terminals is called a ________

potentiometer

_________ is the opposition to the flow of magnetic force.

reluctance

________ is the ability of a material to retain magnetism after a magnetizing force is removed.

retentivity

A variable resistor having two terminals is called a _____

rheostat

If there is only one path for electrons to flow, the circuit is called a ____ circuit

series

If there is a path from one terminal of one the source to the other, without passing through the load, the circuit is said to be ______

shorted

A glass tubular fuse that uses a small spring to pull the fusible link apart is called ____ fuse

slow blow

An electromagnetic switch having a movable core is called a

solenoid

the sum of all of the voltage drops in a series circuit is equal to the _______

source voltage

The active material on the negative plate of a fully charged lead-acid battery is ______ _____

spongy lead

The electrolyte of a lead-acid battery is made up of _____ ____ and water

sulfuric acid

The total power dissipated in a parallel circuit is equal to the _____ of the power dissipated in each of the individual load resistances

sum

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.

temperture

One ______ is equal to a magnetic flux density of one weber per m²

tesla

The _________ dissipated in a series circuit is equal to the sum of the power dissipated in each of the individual load resistances

total power

______ circuit breakers will open the circuit irrespective of the position of the operating control.

trip-free

High charging currents in the nickel-cadmium batteries may cause a breakdown of the cellophane-like cell separator material, resulting in a condition known as _______ or _____

vicious cycling, thermal runaway

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 ______ remains the same across any of the paths of a parallel circuit

voltage

The generating system in an aircraft utilizes the constant ______ method to charge a battery

voltage

Electrical power is expressed in _______

watts