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M3 > M3 > Flashcards

M3 Flashcards

1
Q

Armature is also called what?

A

Rotor

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2
Q

Power source for the armature is provided by what?

A

Commutator

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3
Q

It is made of several hard copper segments that are separated from each other

A

Commutator

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4
Q

In brushless motors, a motor that has a high RPM but low torque controlled by the external electronic.

A

Inrunner

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5
Q

A brushless motor that is low RPM but high torque

A

Outrunner

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6
Q

In DC machine, it is used when the starting port of the shut motor is too low and where the speed drop of the series wound motor is high

A

Shunt series

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7
Q

What part of the circuit is with the Thermocouple?

A

HOT JUNCTION

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8
Q

In a Thermocouple, the end which is attached to the circuit is called?

A

Cold junction

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9
Q

What is RMS?

A

Root Mean Square

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10
Q

Formula for RMS Power

A

-RMS VOLTAGE MULTIPLY BY RMS CURRENT

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11
Q

If current in a voltage step-up transformer with a Ratio of 1 is to 4, what is the ratio in a current step down?

A

1 is to 4

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12
Q

Turns ratio between primary coil and secondary coil of transformer design to triple its input voltage

A

PRIMARY WILL HAVE 1/3 AS MANY TURNS AS A SECONDARY

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13
Q

Frequency of an alternator dependent upon what?

A

RPM

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14
Q

Generators are referred at the rated voltage?

A

Ampere

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15
Q

How to rate the generators?

A

AMPERE DEGRATED VOLTAGE

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16
Q

It is electrically charged atoms

A

Ions

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17
Q

Static electricity is produced by what?

A

FRICTION & INFLUENCE

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18
Q

It is a device to measure current and how to use it?

A

AMMETER (Break the line/Disconnect the line considering the polarity)

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19
Q

Voltage generation method used to measure the EGT of an aircraft

A

By heat

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20
Q

The relationship between the generators and frequency of the AC signal?

A

Directly proportional

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21
Q

Type of batteries that the electrochemical process is irreversible?

A

Primary cell

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22
Q

In semiconductor, the material used for the amount of electrons that must be assured

A

8 electrons

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23
Q

The smallest charge existing in an electron & proton

A

Elementary charge

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24
Q

This is characterized by a flow of charges in a certain direction

A

Electric current

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25
Q

It is a process of chemical effect in current in electrolysis that can be used for what?

A

Galvanizing

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26
Q

In charging batteries, where do electrical charged atoms (ions) flow?

A

GAS & FLUID/LIQUID

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27
Q

Electrical machines, like motor & generator, operate on?

A

MAGNETISM

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28
Q

Generators & motors are what type of machine?

A

ROTATING ELECTRICAL MACHINE

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29
Q

Principle of all generators

A

Induction of Motion

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30
Q

Why do we need to connect batteries in parallel?

A

TO INCREASE CAPACITY (of such as power, capacity, voltage, current)

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31
Q

Thermocouple consists of?

A
  • 2 DIFFERENT METAL ALLOYS
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32
Q

It is a distance that electrical current travels in the cycle time.

A

Wavelength

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33
Q

It is a conducting liquid.

A

Electrolyte

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34
Q

It is a type of signal in which the current varies in the polarity and quantity in the circuit over a period of time.

A

AC

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35
Q

It is a constant flow of charge carriers in one direction.

A

DC

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36
Q

Electrons move in a few meters per second.

A

Velocity

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37
Q

It is generated by a separation of charges.

A

Voltage

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38
Q

Electrons move in a few meters per second

A

Velocity

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39
Q

Lowest voltage that is hazardous to humans?

A

50 V AC ,120V DC

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40
Q

It is invisible and only its effect is perceptible.

A

Electricity

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41
Q

It is a junction between wire/s, power sources can reduce voltage available for the load as the current has to transfer from 1 device to another

A

CONTACT RESISTANCE

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42
Q

It has better mechanical resistance, has a longer life and is less sensitive to short circuits.

A

NICKEL CADMIUM BATTERY (NiCad or NiCd)

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43
Q

Unlike/dissimilar terminals of power sources are connected will create a?

A

SERIES CONNECTION

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44
Q

It is a particle that surrounds the center of an atom

A

Electrons

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45
Q

It is a generation of high voltages by friction but no current will flow.

A

Static electricity

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46
Q

Method/s to produce conductivity of semiconductors.

A
  • by DOPING
  • by HEAT (increase mobility of electrons)
  • by LIGHT
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47
Q

It is a device/instrument to measure voltage, and how to use it?

A

VOLTMETER, connected in parallel with the Load and/or the Power Source

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48
Q

It is a separation of electrons from a metal bonding through heating.

A

THERMIONIC EMISSION

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49
Q

What will happen if two different metals are immersed into an electrically conductive/conducting liquid?

A

VOLTAGE IS GENERATED

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50
Q

It is a voltage generation in which a crystal is deformed by using pressure.

A

PIEZOELECTRIC EFFECT

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51
Q

It consists of electrolyte and electrodes made of 2 different conductive materials.

A

GALVANIC CELL

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52
Q

Type of battery used in aircraft.

A

NICKEL CADMIUM BATTERY (NiCad)

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53
Q

If 2 power sources are connected in parallel, what will happen to the voltage, current and resistance?

A

-TOTAL CURRENT is the sum of all individual current.
- TOTAL RESISTANCE is lower than the lowest individual resistance.
- TOTAL VOLTAGE is constant.

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54
Q

The current along the series circuit is constant, therefore?

A

the current carrying capacity must be the same.

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55
Q

What happens to the temperature of metal when heated?

A

INCREASES

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56
Q

It is an energy converter that converts electrical charge.

A

PHOTOCELL

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57
Q

EGT (Exhaust Gas Temperature) measurement is using the principle voltage generation. What do you call this principle?

A

ELECTRON THERMIONIC EMISSION

58
Q

It converts mechanical energy into electrical energy.

A

GENERATOR

59
Q

Flow of a charged carrier that changes its direction magnitude repeatedly in a period of time.

A

AC

60
Q

What instrument to measure current and how to use it?

A

AMMETER, cut/disconnect the line/wire and connect the probes of the ammeter in series (on both ends cutted wire) considering the polarity of the ammeter.

61
Q

Peak value of a wave in an AC Voltage

A

AMPLITUDE

62
Q

Type of signal/output produced by the generator.

A

AC

63
Q

Voltage generation method used to measure EGT of an aircraft

A

VOLTAGE GENERATION BY HEAT or BY HEAT

64
Q

It is the ability of a medium to conduct electric fields.

A

PERMITTIVITY

65
Q

It is a process of decomposition when passing an electric current through a lithium

A

ELECTROLYSIS

66
Q

It is the opposition of the flow of electrons

A

RESISTANCE

67
Q

It is the pure substance made up of at least 2 different elements which have been joined together by a chemical reaction.

A

COMPOUND

68
Q

This material has a molecular structure with high mobility on the (valence shell?).

A

CONDUCTOR

69
Q

It is the intensity of current into the body in a given period of time

A

CHARGE

70
Q

What is the symbol used in voltage?

A
  • U (german voltage symbol)
  • V (international voltage symbol)
71
Q

Process of voltage generation that involves the movement of conductor and the influence of the magnetic field.

A

INDUCTION

72
Q

It is identified as the reciprocal of resistance.

A

CONDUCTANCE

73
Q

Type of battery that the electrochemical has a constant current and a variable voltage.

A

PRIMARY CELL

74
Q

What type of current is allowable to flow in a liquid?

A

ION CURRENT TRUE OR FALSE:

75
Q

Forces that moves the electron?

A

ELECTROMOTIVE FORCE

76
Q

Considered most important three phase motors

A

ASYNCHRONOUS

77
Q

Special transformer which allows measurement of AC without breaking the current carrying leads?

A

CURRENT TRANSFORMER

78
Q

Monitors main generator output regulates exciter field current

A

GENERATOR CONTROL UNIT

79
Q

Losses of transformer is either?

A

COPPER LOSSES(SHORT CURCUIT) & IRON LOSSES(OPEN CURCUIT)

80
Q

Motor high output brushless alternators eliminates problems that employ the slipring and brushless?

A

PERMANENT MAGNET GENERATOR

81
Q

Current in rotating magnet?

A

EXCITER CURRENT

82
Q

Positively charged inside the nucleus?

A

PROTON

83
Q

Splitting of a compound

A

Analysis

84
Q

Composed of several molecules

A

Matter

85
Q

Symbol for charge

A

Q

86
Q

Symbol for current

A

I

87
Q

symbol of Conductance

A

G

88
Q

Unit of conductance

A

S

89
Q

It provides visualizationof rapidly varying processes in electrical engineering, electronics and other sciences

A

OSCILLIOGRAPHS/OSCILLISCOPES

90
Q

It is separation of electrons from a metal bonding

A

Electron emission

91
Q

Temperature difference between the junction and the 2 free ends as well as on the combination of metals

A

THERMOELECTRIC VOLTAGE

92
Q

It refers to the flow of current from the positive pole to the negative pole

A

CONVENTIONAL CURRENT FLOW

93
Q

It refers to the flow of current from the negative pole to the positive pole

A

ELECTRON FLOW

94
Q

Is used to measure the frequency or cycle per second of the voltage

A

Hertz

95
Q

Rated voltage of a lead battery cell

A

2V

96
Q

It is defined as the reciprocal of the cycle time T

A

Frequency

97
Q

The smallest unit of substance

A

Molecules

98
Q

What happens in current in a voltage step up transformer with the ratio of 1 is to 4

A

DECREASE CURRENT

99
Q

It is a combination of DC generators and DC motors

A

STARTER GENERATOR

100
Q

It is a small series-wound motor which can be either operated by a DC or by a single phase current at a normal power frequency

A

UNIVERSAL MOTOR

101
Q

It consist of a stator with the excitation winding, the rotor with the armature winding and carbon brushes

A

SHUNT-WOUND DC MACHINES

102
Q

It has a constant ratio of rotation speed and frequency

A

SYNCHRONOUS MACHINES

103
Q

It can be connected as a Shunt-wound machines and use as DC generator

A

COMPOUND DC MACHINE

104
Q

It is the lagging of motor

A

SLIP

105
Q

It is the efficiency of transformers higher than on other transformers but production is more costly

A

TOROIDAL

106
Q

Elements are composed of?

A

ONE SINGLE KIND OF ATOMS

107
Q

Various orbits that the electron orbits?

A

SHELLS

108
Q

Electrically charged atoms

A

IONS

109
Q

Electrons CANNOT be expelled from the atom by?

A

CENTRIPETAL FORCE

110
Q

Mass of electron

A

No mass

111
Q

Chemicals that are mixed with pure water for it to conduct electricity is called?

A

ELECTROLYTE

112
Q

What is applied to the lower layer of a photo cell?

A

BORON ATOMS

113
Q

Photocells that are used in solar cells

A

SILICON PHOTO CELLS

114
Q

Velocity of electrons

A

FEW MILLIMETERS PER SECOND

115
Q

Voltage that increases and decreases linearly

A

TRIANGULAR VOLTAGE

116
Q

A combination of a coil and a magnet

A

Inductor

117
Q

The change of the magnetic field in vicinity of coils is the basic principle of?

A

Induction

118
Q

Relationship between conductance and resistance

A

Reciprocal

119
Q

Siemens is a unit used for?

A

Conductance

120
Q

A device for reversing the direction of flow of electric current

A

COMMUTATOR

121
Q

In a 3-phase systems, the 3 identical coils are attached to?

A

STATOR

122
Q

Other term for free electrons

A

Valence electron

123
Q

Splitting compound

A

Analysis

124
Q

In static electricity, a spark will occure when

A

HIGH VOLTAGE, HIGH HUMIDITY

125
Q

The force electrical charger have on each other

A

COULOMBS LAW

126
Q

If the temperature on a metal increases, the proper motion of electron

A

INCREASES

127
Q

If the junction of two different metals are heated, a voltage is generated at the two free ends. This voltage is called

A

THERMOELECTRIC VOLTAGE

128
Q

How many pole pairs are there in a quadripolar device

A

2

129
Q

When the rotational speed of generator increases, the frequency of a sinusoidal AC

A

INCREASES

130
Q

Angle of the coils in a 3-phase system

A

120

131
Q

The certain resistance in a plate or acid

A

INTERNAL RESISTANCE

132
Q

A current defined as when the terminals of a battery is directly connect to each other high current flows

A

SHORT CIRCUIT CURRENT

133
Q

One method of emitting electrons is by heating. This form is also referred as

A

THERMIONIC EMMISION

134
Q

In aviation, these metals are used in thermocouples for measuring Exhaust Gas Temperature(EGT)

A

CHROMEL, ALUMEL

135
Q

A layer in a photo cell which releases charge carriers when light hits it

A

DEPLETION LAYER

136
Q

The process when the electrical continuity in gases or metal vapour produces light

A

GAS DISCHARGE

137
Q

In a bulb. These external forces make some atoms to splitoff some electrons

A

HEAT, LIGHT, RADIOACTIVITY

138
Q

T or F :
Voltage can be generated if the circuit is in series.

A

False

139
Q

T or F :
Voltage can be generated with the presence of EMF.

A

False

140
Q

T or F:
The amount of voltage that can be generated depends on separation of charges.

A

True

141
Q

T or F :
In Parallel connection, it has a constant voltage and the current value is the sum of all individual current?

A

True

M3 (1 decks)

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