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Dan2024 Study > Electrical Theory > Flashcards

Electrical Theory Flashcards

1
Q

How many minutes should you wait before your resume work after
a lightening storm

A

15 mins

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2
Q

is something that will allow electricity to move through it and has
little resistance to the flow of electricity

A

conductor

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3
Q

How many indicators does a FVD have

A

3

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4
Q

Frequency range of the FVD

A

50 -150 Hz

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5
Q

Electricity is measured by this

A

Voltage

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6
Q

is the measure of flow of electrons pass a give point in the
conductor in one second

A

Current

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7
Q

electricity travels in this type of circuit

A

Closed circuit

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8
Q

The muscles will contract at how many mA

A

15 mA

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9
Q

GFCI

A

Ground Fault Circuit Interrupters

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10
Q

Lower the resistance the amps

A

increase

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11
Q

FVD will test up to how many volts

A

200

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12
Q

500 volts or less require at a minimum this class of glove

A

Class 00

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13
Q

1,000 volts or less requires at a minimum this class of glove

A

Class 0

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14
Q

7,500 volts or less require at a minimum this class of gloves

A

Class 1

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15
Q

Class 00 glove can work up to this maximum amount of voltage

A

500 volts

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16
Q

Protector gloves must meet this specification

A

ASTM F 696

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17
Q

The minimum distance between the top of the cuff and rolled top
of cuff must not be less than

A

1 inch

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18
Q

Class 1 glove can work up to this maximum amount of voltage

A

7500

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19
Q

Class 0 glove can work up to this amount of voltage

A

1,000

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20
Q

This type of gloves are worn under high voltage gloves

A

Cloth

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21
Q

In the cable industry this class of gloves are the minimum

A

Class 1

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22
Q

Range in inches, 300 V or less

A

avoid contact

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23
Q

Range in inches, 300v - 750V

A

12 inches

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24
Q

Range in inches, 750-2000K

A

18 inches

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25
Q

Range in inches, 2k - 15k

A

24 inches

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26
Q

Range in inches, 15k-37k

A

36 inches

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27
Q

Range in inches, 37k- 87,500k

A

42 inches

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28
Q

Range in inches, between 121k adn 140k

A

54 inches

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29
Q

Prevents the flow of electricity

A

Insulators

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30
Q

This allows the flow of electricity

A

Conductors

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31
Q

This resists the flows electricity

A

Resistors

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32
Q

2 materials in semiconductors

A

Silicon, germanium

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33
Q

Two materials used for resistors

A

Tungsten and Carbone

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34
Q

Resistance is measured in this type of units

A

ohms

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35
Q

Joules law in its simplifies form is

A

Power = current * Voltage

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36
Q

Ohms law can be found in this type of circuits

A

AC and DC circuits

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37
Q

Too plot the sum of the 2 sine waves as a function is known as

A

Frequency Domain

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38
Q

commonly used to analyze the complex signals encountered in
HFC networks

A

Frequency Domain

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39
Q

Term that describes the direction of an electrical field in a radiated
wave

A

Polarity

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40
Q

The amount of electrons that pass a given point in the conductor

A

Coulomb

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41
Q

The different in voltage between one point and another

A

Potential Difference

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42
Q

The direction of an electrical field in a radiated wave

A

Polarity

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43
Q

An electrical current of which the polarity is periodically reversed

A

A/C

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44
Q

The current passes through a thin piece of metal know as

A

filament

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45
Q

Voltage/current is on which axis

A

Y axis

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46
Q

Time is on which axis

A

X axis

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47
Q

The 4 AC waveforms

A

Sine, Square, Quasi-square, Sawtooth

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48
Q

The CATV transmits data through this type of a wave

A

Sine

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49
Q

Mainline equipment uses this wave to minimize damage from
electrical pulses to components

A

Quasi-Square

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50
Q

Waveform represents the characteristics of the voltage/current that
feeds your home, power your power supplies

A

Sine

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51
Q

This waveforms is often found within the switching regulator DC
output power supplies in amplifiers

A

Square Wave

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52
Q

The square root of the arithmetic mean of the square of a set of
values

A

Root Mean Square (RMS)

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53
Q

Waveform typically used to drive the horizontal trace on an oscilloscope or spectrum analyzer

A

Sawtooth

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54
Q

One complete sine wave =

A

Cycle

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55
Q

of cycles of an AC waveform that occur in one second

A

Frequency

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56
Q

The speed of light / frequency

A

Wavelength

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57
Q

Amount of time it takes a waveform to complete one cycle

A

Period

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58
Q

Peak value of a waveform

A

Amplitude

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59
Q

The relationship between two signal attributes is represented
graphically

A

waveform

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60
Q

is the position of the amplitude value as related to time

A

Phase

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61
Q

The rate at which energy is used

A

Power

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62
Q

current as one coulomb passing a point in one second

A

Ampre

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63
Q

All matter is made up of

A

Atoms

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64
Q

Electrons have this electrical charge

A

negative

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65
Q

Protons have this electrical charge

A

Positive

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66
Q

This prevents the flow of electricity

A

Insulators

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67
Q

List two types of insulators

A

Wood, rubber, ceramic

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68
Q

List two types of conductors

A

coper, gold, silver

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69
Q

This resist the flow of electricity

A

Resistors

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70
Q

When electricity flows through a resistor it dissipated as this

A

heat

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71
Q

These are used to make transistors and integrated in circuits

A

Semi-conductors

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72
Q

This is given the symbol “E”

A

Electromotive force

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73
Q

AA battery provides how much volts of electromotive force

A

1.5 volts

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74
Q

I equals this

A

Current

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75
Q

R equals this

A

Resistance

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76
Q

Ohms law =

A

E= I multiplied by R

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77
Q

Joules law power equals this uniter of measurement

A

Watts

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78
Q

Batteries provide electromotive force in this range , in volts

A

1.5 to 24 volts

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79
Q

This formula can be used to determine the relationship between
the voltage, resistance, and current

A

Ohm’s law

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80
Q

This formula can be used to determine the relationship between
the voltage, current, and power

A

Joule’s law

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81
Q

a plot of a signal as a function of time is called this

A

Time Domain

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82
Q

The DC voltage is this as to the function of time

A

constant

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83
Q

The voltage rate in North America, in Hz

A

60 Hz

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84
Q

an equivalent DC voltage that would deliver the same power as
the AC voltage when applied to a resistor

A

RMS (Root Mean Square)

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85
Q

Typical AC peaks on the HFC network are in this range, in VAC

A

60 to 90

86
Q

HFC plant is powered by this wave

A

Quasi-square

87
Q

Ohms law can be used in these two circuits

A

AC and DC

88
Q

The oscilloscope displays AC voltages as

A

Function of time

89
Q

What are the two possible ways to plot the sum of two sine waves

A

Time Domain and frequency domain

90
Q

This states that current is directly proportional to voltage and
inversely proportional to resistance

A

Ohms law

91
Q

is the difference in electric potential between two points

A

Voltage €

92
Q

is the rate of flow, or continuous movement of an electrical charge
on the conductor past a point on the circuit

A

Current (I)

93
Q

is a materials substance that offers opposition or tendency to
resist the flow of charge of an electric current

A

Resistance (R or ohms)

94
Q

Resistance (R or ohms)

A

omega

95
Q

Each active device requires this

A

voltage

96
Q

LPI

A

Line Power Inserter

97
Q

This device does not require voltage to function

A

passive device

98
Q

voltage can pass through a passive device by installing this device

A

Shunt

99
Q

a safety device consisting of a strip of wire that melts and breaks
an electric circuit if the current exceed a safe level

A

Fuse

100
Q

an electrical conductor joining two points of a circuit, through
which current may be diverted

A

Shunt

101
Q

device used to introduce AC to the cable plant

A

Line Power Inserter

102
Q

device constructed to provide multiple outputs for one signa

A

Splitter

103
Q

device used to equally distribute RF from the cable network to
customers

A

taps

104
Q

device used to equally distribute RF from the cable network to
customers while allowing power to pass through selected ports

A

Power passing taps

105
Q

device used to sample a portion of an input signal for testing or
monitoring purposes

A

DC

106
Q

The resistance offered by coaxial cable is referred to as this

A

Loop resistance

107
Q

is equal to the sum of the center conductor resistance added to
the sheath resistance and is rated in Ohms

A

Loop resistance

108
Q

Loop resistance is given based on this amount of feet

A

1000

109
Q

Two types of resistance that equal loop resistance

A

Center conductor and outer conductor Resistance

110
Q

this is a fundamental unit of electrical charge

A

coulomb

111
Q

symbol for coulomb

A

Q

112
Q

is the difference of electric potentials between those two points

A

voltage

113
Q

name the two symbols for voltage

A

E or V

114
Q

is the work required to move an electric charge of one coulomb
through an electrical potential difference of one volt or one
coulomb

A

Joule

115
Q

is the work required to produce one watt of power for one second

A

Joule

116
Q

current has the two symbols

A

I and A

117
Q

is a flow of electric charge by moving electrons

A

Current

118
Q

Is the measure of electric current

A

ampers

119
Q

is the rate at which energy is generated or consumed

A

Power

120
Q

is the measurement of electric power

A

watts

121
Q

is the opposition to the passage of an electric current though a
conductor

A

Resistance

122
Q

is the measurement of resistance

A

ohms

123
Q

is the sum of the currents flowing into a node is equal to the sum
of the currents flowing out of that node

A

Kirchhoffs first law

124
Q

this circuit is called a current-coupled or daisy chain- coupled

A

Series

125
Q

the current is this circuit goes through every component in the
circuit

A

Series

126
Q

is a collection of electrochemical cells

A

battery

127
Q

individual cells/batteries connected together in a series is called
this

A

string

128
Q

the same voltage is applicable to all circuit components

A

parallel

129
Q

current is the sum of the currents through the individual components

A

parallel

130
Q

The initial retest for rubber gloves is due from issue in how many
months

A

12

131
Q

After 12 months from issue, rubber gloves should be retested how
many months

A

9

132
Q

lightening can send this type of surge through the cables and
destroy coaxial lines

A

DC

133
Q

This part of the ground is always a potential conductor

A

Point of entrance

134
Q

EMF

A

Electromagnetic Force

135
Q

The electrical wire thickness is called

A

Gauge

136
Q

What two variable in soil determines how effective the ground will
be

A

Mineral composition and moisture levels

137
Q

Electrical range for 12 inch clearance

A

300 - 750 volts

138
Q

Electrical range for 18 inch clearance

A

750 to 2,000 volts

139
Q

Electrical range for 24 inch clearance

A

2,000 to 15,000 volts

140
Q

electrical range for 36 inch clearance

A

15,000 to 37,000 volts

141
Q

Electrical range for 42 inch clearance

A

37,500 to 87,500 volts

142
Q

Electrical range for 48 inch clearance

A

87,500 to 121,000 volts

143
Q

this two types of gloves are worn with high voltage gloves

A

Leather protector gloves outside and cloth inside

144
Q

Class 2 glove up to this many volts

A

17,000 volts

145
Q

Class 3 glove up to this many volts

A

26,500 volts

146
Q

Class 4 gloves up to this many volts

A

36,000 volts

147
Q

is defined as the distance that should be maintained between any
part of the body, non insulated tool pole or bucket platform and
the energized exposed power conductors

A

Approach distance

148
Q

is a path through which electrons flow

A

Conductor

149
Q

Subatomic particles found in atoms that balance out the positive
charge of a proton

A

Electron

150
Q

A battery or generator that provides electrical power to the circuit

A

Power source

151
Q

Batteries and generators are source of this

A

Power source

152
Q

A conductor, such as the copper wire represents this

A

Path

153
Q

The device that uses the electricity

A

Load

154
Q

It is any device that draws current, for example light bulbs, appliances

A

Load

155
Q

This is the reason an electrical circuit was created

A

load

156
Q

List all the properties of an electrical circuit

A

Voltage, current, resistance

157
Q

Is the pressure that causes electrons to flow in a circuit

A

Electromotive force

158
Q

State Ohms law in its basic form

A

Resistance = Electromotive force / Current

159
Q

is the exponent or the power to which a fixed number must be
raised in order to produce a given number

A

Logarithm

160
Q

is the number of times the base is multiplied by itself

A

Exponent

161
Q

is the number being raised

A

Base

162
Q

is one tenth of a bel

A

decibel

163
Q

Voltage, in dB, equals this many times the log of the ratio of voltage

A

20x

164
Q

Human ear AC waveforms over this range in Hz

A

16 to 16,000

165
Q

The point at which the filament reaches a temperature that causes
it to glow

A

Incandescence

166
Q

when displayed as a graph, or continuous plot, can be created
to show the relationship between current or voltage and elapsed
time

A

AC waveform

167
Q

the section of the waveform above the horizontal axis corresponds to this polarity

A

Positive

168
Q

the section of the waveform below the horizontal axis corresponds
to this polarity

A

negative

169
Q

This law states the sum of the voltage drops in a circuit are equal
to the voltage applied to that circuit

A

Kirchoff 2nd law

170
Q

this concept is used in every large cable system that uses amplifiers

A

Unity Gain

171
Q

is a stream of charged particles such as electrons moving through
an electrical conductor

A

Electric current

172
Q

Amps can be measured on an electrical conductor using this

A

ammeter

173
Q

is the force required to move electrons between two points

A

Voltage

174
Q

is the amount of current that pass a specific point within a second

A

Amperage

175
Q

is the amount of electrons that pass a specific point within a
second

A

Current

176
Q

Name 3 components of an electrical circuit

A

voltage, current, resistance

177
Q

VOM

A

Volt Ohm Meter

178
Q

FVD

A

Foreign Voltage Detector

179
Q

PPE

A

Personal Protective Equipment

180
Q

Fuses, circuit breakers, GFCI protect people from electrocution

A

Electrical Protective Devices

181
Q

Mobile home frames have a potential to carry this type of voltage

A

Stray

182
Q

This determines how effective a ground will be

A

Soils

183
Q

This test on the rubber gloves you squeeze the fingers of the
glove together and let go quickly to see if gloves returns to original
shape.

A

Resiliency test

184
Q

list the basic parts of an electrical circuit

A

Load, Power source, path

185
Q

Subatomic particles found in atoms that balance out the positive
charge of a proton

A

Electrons

186
Q

List the properties of an electrical circuit

A

Voltage, current, Resistance

187
Q

The 60 Hz input frequency is rectified, then switched on and off
(or positively and negatively) at a much higher frequency

A

Square Wave

188
Q

is the effect of voltage causing the movement of current for a
certain length of time

A

Power

189
Q

current as one coulomb passing a point in one second

A

Ampered

190
Q

This is equal to the current in the cable times the resistance of the
cable

A

Voltage Drop (NCT4 94)

191
Q

The amount of energy available to move a certain number of
electrons from one point to another in an electrical circuit

A

Voltage

192
Q

PSOS

A

Power supply on standby

193
Q

PSLOC

A

Power supply lost on communication

194
Q

if battery voltage remains above 34 VDC for this many mins
reapply power

A

5

195
Q

cable system uses these two types of voltages

A

Direct and alternating

196
Q

This type of voltage is used to power all active devices

A

Direct

197
Q

this type of voltage is used from the power supply to all active
devices via the coax

A

Alternating

198
Q

The typical voltage levels used in a cable system are in this range
in volts

A

60 -87 volts

199
Q

current on any given span is determined by the this

A

number of devices downstream

200
Q

is equal to the sum of the center conductor resistance added to
the sheath (shield) resistance and is rated in Ohms.

A

Loop Resistance

201
Q

Loop Resistance formula

A

footage/1000 X manufactures specs

202
Q

Total amp draw X loop resistance =

A

Voltage loss on span

203
Q

the current always flows directly from the positive terminal of the
voltage source to the negative terminal of the voltage source

A

Direct Current

204
Q

RMS voltage is this amount of the peak voltage

A

.707 times

205
Q

The relationship between the peak and the RMS voltage only true
for this type of waveform

A

AC waveforms in sinusoidal shape

206
Q

is a stream of charged particles, such as electrons, moving
through an electrical conductor

A

Current

207
Q

is a stream of charged particles, such as electrons, moving
through an electrical conductor

A

Current

208
Q

Amps can be measured on an electrical conductor using this tool

A

Ammeter

209
Q

Amperage as little as this can cause a painful shock

A

5 milliamps

210
Q

Oscilloscope displays AC voltage as this function

A

Time

211
Q

Range in inches, 87,500 - 121k

A

48

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