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Competency Enhancement > ABE54 - ELECTRIFICATION > Flashcards

ABE54 - ELECTRIFICATION Flashcards

1
Q

Known as the relative mobility of electrons within a material.

A

electric conductivity

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2
Q

Materials with high electron mobility (many free electrons) are called _______.

A

Conductors

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3
Q

Materials with low electron mobility (few or no free electrons) are called __________.

A

insulators

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4
Q

It is used to used to open and close circuits

A

It is used to used to open and close circuits

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5
Q

Rate of charge flow past a given point in an electric circuit

A

Current

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6
Q

The work required to move a unit charge from one location to another

A

Voltage

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7
Q

Applies to resistors in series “The ratio of individual resistance to total resistance is the same as the ratio of individual voltage drop to total supply voltage in a voltage divider circuit.”

A

Voltage Divider Formula

Voltage Divider

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8
Q

Applies to resistors in parallel “The ratio of total resistance to individual resistance is the same ratio as individual (branch) current to total current”

A

Current Divider Formula

Current Divider

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9
Q

No power lost in stepping up or down the voltage. Thus, power in the primary circuit is equal to the power out the secondary circuit

A

Ideal Transformer

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10
Q

A waveform is defined as one waveform that is ahead of another in its evolution.

A

leading

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11
Q

The total measure of opposition to electric current and is the complex (vector) sum of (“real”) resistance and (“imaginary”) reactance.

A

Impedance

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12
Q

True power over apparent power

A

Power Factor

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13
Q

American diplomat and natural philosopher, he proved that lightning and electricity were the same. He conducted a Kite Experiment in 1752 and said Electricity travels through conductors.

A

Ben Franklin

Benjamin Franklin

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14
Q

He Invents the Light Bulb and Generating Stations in NYC (1882).

A

Thomas Edison

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15
Q

The flow of electrons from one place to another.

A

Electricity

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16
Q

A combination of a prime mover, (typically an engine), and an alternator.

A

Generator Set

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17
Q

Uses the sun energy to either boil water or directly converts solar energy to electrical energy

A

Solar

Solar Energy

Solar Power

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18
Q

Solid-state devices that convert sunlight directly into electricity. It has no moving parts, highly reliable and requires little maintenance. No greenhouse gas emissions and operates silently. Can be built virtually in any size (modular). Cost effective in areas that are remote from utility grids

A

Photovoltaic (PV) Modules

Photovoltaic Modules

PV Modules

Photovoltaic

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19
Q

It is made of semiconductor materials (e.g. silicon) and converts photon energy to electricity

A

PV Cell

PHOTOVOLTAIC CELL

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20
Q

It uses a material called Uranium to produce electricity.

A

Nuclear Power Plant

Nuclear Power

Nuclear Plant

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21
Q

It refers to the different stages of carrying electricity over poles and wires from generators to a home or a business. (Complete words)

A

Transmission and Distribution

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22
Q

These lines can be found overhead or sometimes in the ground, and, combined, transmission and distribution lines make up what is commonly called “________.”

A

Grid

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23
Q

It refers to the part of electricity delivery that moves bulk electricity from the generation sites over long distances to substations closer to areas of demand for electricity.

A

Transmission

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24
Q

These are the lines many people see along streets.

A

Distribution Lines

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25
Q

The voltage of distribution lines – the lines many people see in their neighborhoods – is approximately __________;

A

13 kV

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26
Q

A typical household runs on how many Volts?

A

220V

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27
Q

Meaning of acronym NGCP?

A

National Grid Corporation of the Philippines

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28
Q

Premises wiring shall not be electrically connected to a supply system unless the latter contains, for any grounded conductor of the interior system, a corresponding conductor that is _______.

A

grounded

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29
Q

An insulated grounded conductor of ___ mm2 or smaller shall be identified by a continuous white or gray outer finish or by three continuous white stripes on other than green insulation along its entire length.

A

14

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30
Q

A switching device that interrupts the abnormal or fault current. It is a mechanical device that disturbs the flow of high magnitude (fault) current and in additions performs the function of a switch.

A

Circuit Breaker

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31
Q

A type of conductor, which is a material that conducts electricity.

A

Electrical Wire

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32
Q

A metal or plastic enclosures used as housings for wiring connections.

A

A metal or plastic enclosures used as housings for wiring connections.

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33
Q

A component of an electrical distribution system which divides an electrical power feed into branch circuits, while providing a protective circuit breaker or fuse for each circuit, in a common enclosure.

A

A component of an electrical distribution system which divides an electrical power feed into branch circuits, while providing a protective circuit breaker or fuse for each circuit, in a common enclosure.

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34
Q

A receptacle in a wall or baseboard for connection to lamps or other electrical appliances.

A

Convenience Outlet

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35
Q

A switch most commonly used to operate electric lights, permanently connected equipment, or electrical outlets.

A

Light Switch

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36
Q

It is where the wires connected to the load side of the meter enter the house or building.

A

Service Entrance

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37
Q

A device that measures the amount of electric energy consumed by a building, tenant space, or electrically powered equipment.

A

Electric Meter

Energy Meter

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38
Q

These are used for convenience outlets, switch boxes or small junction boxes.

A

Utility Boxes

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39
Q

A form of radiant energy from natural sources (e.g. the sun and stars), and artificial sources (e.g. a candle and electric lamps).

A

Lights

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40
Q

The application of light to illuminate objects, surfaces, scenes, pictures and people.

A

Lighting

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41
Q

The color of light is determined by its________.

A

wavelength

42
Q

The region with slightly longer wavelengths immediately adjacent to the red end of the visible spectrum is known as the _______.

A

infrared

43
Q

The rays of light enter the eye through the ________, which is the transparent membrane that bulges out at the front of the eye.

A

Cornea

44
Q

The ability of the eye to adjust to higher or lower levels of luminance.

A

Adaption

45
Q

The eye losses all its facility to see in color and the rods take over giving completely black and white vision, called ________, or nighttime adaptations.

A

Scotopic

46
Q

All the radiated power emitted by a light source and perceived by the eye is called___________ (Φ) commonly called light output.

A

luminous flux

47
Q

Generally speaking, a light source emits its ______ (Φ) in different directions and at different intensities.

A

Luminous Intensity

48
Q

A measure of the amount of light falling on a surface.

A

Illuminance

E

49
Q

The brightness of an illuminated or luminous surface as perceived by the human eye. Unit of measurement is candelas per square meter (cd/m2).

A

luminance

L

50
Q

It produces light by the passage of an electric current through a vapor or gas, initiating the discharge to fluoresce

A

Electric discharge lamps

51
Q

A physical interconnection of devices that influences the behavior of other devices or systems.

A

Electrical Control System

52
Q

This refers to the part of the control system to be controlled or monitored, it can also be referred to as a process.

A

Plant

53
Q

This can either be a device inside the system or outside the system which regulates the plant or the process

A

Controller

54
Q

Certain books refer to this term as (the controlled output CO) and is defined as the signal of interest, the desired result to be obtained from the system

A

Output

55
Q

This is the signal injected into the system from an external energy source. It is majorly referred to as the reference input.

A

Input

56
Q

This can be seen as an alien signal, which can be generated either externally or internally that affects the system in a negative manner.

A

Disturbance

57
Q

System where one in which the output does not feedback to the input to correct variations.

A

Open loop control system

58
Q

System where one in which the output has an effect upon the input to maintain a desired output value.

A

Closed loop control system

59
Q

Types of control where the system uses no automatic controls, the link is provided by the human operator.

A

Manual Control

60
Q

Types of control where the sequence of operations is carried out automatically after being started by a human operator.

A

Semi-automatic control

61
Q

Types of control where the human operator is replaced by a controller which monitors the system in comparison with a desired value, using feedback loops to take corrective action if necessary

A

Automatic control

62
Q

Types of control where a level, hand wheel or other attachment fixed on the unit ‘locally’ is used as a means of alteration and control.

A

Local control

63
Q

Types of control where the regulating unit is connected to an actuating device mounted some distance away by means of power transmission through electrical linkages.

A

Remote Control

64
Q

Types of control where the regulating unit can occupy only one of the two available positions of ‘on’ or ‘off’.

A

On/off control

65
Q

Types of control where more than two positions can be occupied by the regulating unit but the action occurs in steps rather than being continuous.

A

Step-by-step control

66
Q

Advantages of electric motors

A

All of the above

67
Q

Disadvantage/s of electric motors

A

Not adopted to mobile applications such as engines

68
Q

Factor in selecting electric motor where electricity may be direct current (d.c.) or alternating (a.c.).It may be one of several voltages.

A

Type of electric power available

69
Q

Part of a motor where it consists of a slotted core, made up of thin sections of a special soft steel, exercise pet squirrels

A

Rotor

70
Q

Part of a motor where it consists of a slotted core also made of special laminated steel. Insulated copper wire is wound in the slots in such a way as to form one or more pairsof definite magnetic poles

A

Stator

71
Q

A Types of motor where motor consists of a squirrel-cage rotor and a stator in which are found two different sets of windings

A

Split-phase

72
Q

A Types of motor where motor has only one winding in the stator which acts as a running winding. It has a wound rotor instead of the squirrel-cage type and therefore has a commutator and brushes

A

Repulsion-start induction

73
Q

A Types of motor where motor will operate on either direct or alternating current of the correct voltage.

A

Universal motors

74
Q

A Types of motor where the direction of rotation of a is determined by the way the three line wires are connected to the motor. Interchanging the connections of any two line leads will cause the motor to rotate in the opposite direction, so reversing is a very simple process.

A

Three-phase motors

75
Q

A Characteristics of a Good Electrical System where there are grounding, proper size of conductors and ratings of circuit breakers

A

Safe

76
Q

A Characteristics of a Good Electrical System where the design is ready for future expansion

A

Expandable

77
Q

A Characteristics of a Good Electrical System where the one that fulfills its needs at the least expense over the lifetime of the system

A

Efficient

78
Q

Type of grounding where grounding is for current-carrying portions of the system

A

System Grounding

79
Q

Type of grounding where it can be a grounding electrode or any conductive material connected directly or indirectly to earth

A

Equipment Grounding

80
Q

Type of grounding where the main function is to prevent electric shock to persons or animals coming in contact with metallic objects, which themselves have come in contact with a hot conductor due to some electrical fault

A

Type of grounding where the main function is to prevent electric shock to persons or animals coming in contact with metallic objects, which themselves have come in contact with a hot conductor due to some electrical fault

81
Q

It is used to create mechanical energy.

A

Engine

82
Q

This creates the electrical output from the engine generated mechanical energy.

A

Alternator

83
Q

A piece of portable equipment, consisting of an engine and an alternator/electric generator, used to provide energy.

A

Generator Set

84
Q

A system used to generate electricity from a fuel source.

A

Power Station

85
Q

The water stored in dams is released directly onto a turbine at the base of the dam wall.

A

Hydroelectric power station

86
Q

It uses the sun energy to either boil water or directly converts solar energy to electrical energy

A

Solar Energy

87
Q

Solid-state devices that convert sunlight directly into electricity

A

Photovoltaic Modules

88
Q

It is made of semiconductor materials (e.g. silicon) and converts photon energy to electricity

A

Photovoltaic Cells

89
Q

The process of adding atoms with different number of electrons to create an unbalanced number of electrons to the base material (silicon)

A

Doping

90
Q

This creates an electric field that allows the unidirectional flow of electrons in the cell

A

PN Junction

91
Q

The PV Systems Common Components

A

All of the above

92
Q

The use of wind to turn a turbine that is connected to an electrical generator to generate electricity.

A

Wind Energy

93
Q

Turbine Control where it continuously orients the rotor in the direction of the wind

A

Yaw Control

94
Q

Turbine Control where when the wind speed exceeds the safe limit on the system, the blades are shifted into a position such that they stall. The turbine has to be restarted after the gust has gone

A

Stall Control

95
Q

It uses a material called Uranium to produce electricity.

A

Nuclear power plant

96
Q

It is the “National highway” of electricity delivery.

A

Transmission

97
Q

If transmission is the national highway of the grid, ________ is the city street

A

distribution

98
Q

the lines many people see in their neighborhoods – is approximately how many volts? (answer the number only)

A

13000

99
Q

They operates and maintains metering facilities and provides technical services, particularly system studies, and operation and maintenance of customer facilities.

A

NGCP or National Grid Corporation of the Philippines

100
Q

A typical household runs on _____ volts

A

220

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