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WorksheetsNLC Final Egrid 1
Total questions: 77
Worksheet time: 39mins
Which underlined voltage shows a line-to-neutral measurement?
69,000
19,900/34,500
7,200/ 13,000
12,000
What does this device measure?
Ohms
Watt-hours
Volts per second
Horsepower
The textbook references an electrical quantity at which wire will melt if the value exceeds the wire's rating.
Which electrical quantity is this referring to?
The amp
The watt
The ohm
The volt
If the strength of the magnet and the speed at which it passes the conductor increase, which electrical value is also increased?
The watt
The ohm
The amp
The volt
A system operating at 12,000/20,800 volts would most likely be:
Distribution
Generation
Substation
Transmission
Where in the electrical system is the voltage normally stepped up?
Between transmission and distribution
Between generation and transmission
Between distribution and the substation
Between transmission and subtrasmission
The "amp" is best defined as:
One ohn per second
A quantify measurenment of electrons
One coulomb per second
Electromotive pressure
Which of the following best defines the "coulomb"?
The unit of measure for resistance
A quantify measurement of electrons
Equal to one gallon of liquid
A quantify measurenment of volts
When speaking of electricity, many references are made to water. Which value shares the closest similarity with the flow of water, measured in gallons per minute?
The watt
The volt
The amp
The ohm
The unit of measure for power is:
The ohm
The volts
The amp
The watt
The unit of measure for electromotive pressure is:
The amp
The watt
The volt
The ohm
What is the RMS if peak voltage = 3,394?
Use calculations as discussed in Chapter 6 from this week's sessions. Your calculation may be slightly above or below the correct answer. Choose the option that is closest.
5,090
4,800
7,200
2,400
What is the RMS if peak voltage = 97,566?
Use calculations as discussed in Chapter 6 from this week's sessions. Your calculation may be slightly above or below the correct answer. Choose the option that is closest.
62,216
68,979
48,783
137,958
Which of these statements best defines RMS?
RMS is a graphical representation of what is happening to AC voltage over time
RMS is a peak voltage of DC when the generator is at 90 degrees
RMS is the value of AC that produces the same amount of power as a like value of DC
RMS is the voltage at any given point on the waveform
What statement about transmission insulators is true?
They offer more contact area at the point at attachment
They are trending toward the increased used of polymers
They can be bundled to increase capacity
They are sometimes manufactured with a fiber-optic cable in the center
These types of structures are generally the choice for 345 kV lines and above.
Wood structures
Tubular steel poles
Lattice-type steel
Single-circuit towers
Which of the following generation methods is considered a renewable resource?
Natural gas
Oil
Geothermal
Coal
Which of these statements about polarity is true?
A negative voltage is produced when the electrons are repelled
A positive voltage produced when the protons are repelled
Voltage constantly moved between postive and negative
Polarity equals 100,000,000 lines os flux per second
What is the RMS if peak voltage = 10,183?
Use calculations as discussed in Chapter 6 from this week's sessions. Your calculation may be slightly above or below the correct answer. Choose the option that is closest.
5,090
5,882
14,400
7,200
Which of these statements best defines the smart grid?
Its no longer meets grid requirements in certain areas
It requires troubleshooters to spend time figuring out the cause of a problem
It is infrastructure delivering electricity from a small number of sources to a large number of customers
It uses technology that permits a two-way flow or both electricity and information
Which operating voltage is typical for a generating facility?
69,000
13,800
345,000
12,000
Which of these statements about generation is true?
The generator is used to spin the turbine
Leaving the plant, voltage is stepped down for long- distance transmission
Electrical energy is most, often generated at a voltage in the range of 44,000 to 138,000 volts
AC means that the flow of electrical energy changes direction at a certain rate
One complete rotation of the generator is known as:
Frequency
Cycle
Hertz
Flux
Which of these statements best defines RMS?
RMS is the voltage at any given point on the waveform
RMS is the peak voltage of DC when the generator is at 90 degrees
RMS is a graphical representation of what is happening to AC voltage over time
RMS is the value of AC that produces the same amount of power as a like value of DC
Why would utilities install circuits underground?
Because of requirements by the national electric safety code
Bacause they are approximately four times more expensive than overhead
Because the cities may have passed an ordinance requiring underground circuits
Because fiberglass and steel poles are higher in initial cost
Which of these items is considered a resistive load?
Capacitor
Synchoronus motor
Induction motor
Incandescent light bulb
If a complete circuit exists, when the negative pole of the magnet passes near a conductor:
The protons are attracted, creating current flow
The electrons are attracted, producing a negative charge
The protons are repelled, producing a negative value of voltage
The electrons are repelled, creating current flow
Which of the following generation methods is considered a renewable resource?
Oil
Coal
Geothermal
You
Which of these voltage changes would be representative of a transmission substation?
500,000 to 345,000
24,000 to 500,000
13,800 to 230,000
115,000 to 230,000
Which of these statements best defines secondary?
Runs from pole to customers
Runs from padmount to pedestal
Runs from pedestal to the customer
The high-voltage portion of a distribution line
How many times does the generator produce zero volts in a complete rotation?
Three
Two
Four
One
One fundamental law of physics states that:
Energy can be created and destroyed
Opposite charges repel and like charge attract
Energy cannot be converted
Energy can only be converted: neither created nor destroyed
Select the image that shows a post insulator.
A
B
C
D
Select the image where the mainline system neutral is on the same arm as the mainline phases.
A
B
C
D
This device breaks regular line load but not fault current on all three phases at the same time.
A
C
B
D
Select the image of a structure that has two single-phase taps attached to it.
A
B
C
D
Which of these voltage changes would be representative of a subtransmission substation?
230,000 to 138,000
69,000 to 12,000
345,000 to 230,000
13,000 to 345,000
Which of these is one of the major functions of a substation?
Generate power for smaller electrical circuits
Transmit bulk power over long distances to given point
Change the voltage of circuits from one level to another
Prevent interruption of power on transmission lines
What does the text say about the filament in this light bulb?
It produces 746 ohms, which is equal to one horsepower
The watts produced are similar to the flow of one gallon per minute
It is a conductor that offers high resistance to current flow
It creates voltage across its two terminals
Select the image of a tap line that has no fuse between it and the feeder.
A
B
C
D
Which arrow is pointing at the semi-conducting shield?
A
B
C
D
Select the image with surge arresters protecting the cutouts and equipment in an overhead setting
A
B
C
D
Which image best represents the type of system that is similar to our system of interstates and freeways?
A
B
C
D
This device can interrupt large amounts of current.
A
B
C
D
This device provides the ability to measure the flow of power in the system.
A
B
C
D
This device changes the voltage from one level to another but does not provide the ability to measure the flow of power in the system.
A
B
C
D
This device is often equipped with a load tap changer.
A
B
C
D
Most new ones are three-phase units and require special transportation to the job site for installation.
A
B
C
D
This device can interrupt large amounts of current.
A
B
C
D
These might use oil, vacuum, or sulfur hexafluoride to accomplish their operations.
A
B
C
D
Which of these substation components helps ensure the safety of the public who may be near the station fence during a fault condition?
Reactor
Control house
Steel structures
Ground grid
This device counteracts the negative effects of inductive reactance.
A
B
C
D
This piece of equipment can determine if a fault is temporary or permanent.
A
B
C
D
This device has a dial at the top of the unit.
A
B
C
D
Which of the images is likely a delta distribution line?
A
B
C
D
Select the image that shows a low-voltage portion.
A
B
C
D
this divice is used to reroute the flow of power in the station
A
B
C
D
Which of these figures best describes electricity generated in the U.S. and Canada?
60 Hz
50 cycles
7,200 volts
90 degrees
Which of these is a factor that contributes to the strength of voltage?
The size of the wire used in the coil
The shape of the magnet
The number of turns in the coil of wire
The color of the wire used in the coil
Which of these generators does not require any type of fuel?
Resource recovery
Combustion turbine
Coal
Hydroelectric
Which of these terms best describes voltage and current rising and falling at the same time?
Instantaneous
In phase
RMS
When the generator is at_____, the voltage
produced is at its maximum, positive value.
90 degrees
45 degrees
270 degrees
360 degrees
What is the peak voltage if RMS = 115 kV?
Use calculations as discussed in Chapter 6 from this week's sessions. Your calculation may be slightly above or below the correct answer.
Choose the option that is closest.
57,482
81,305
230,000
162,610
What is the RMS if peak voltage = 10,183?
Use calculations as discussed in Chapter 6 from this week's sessions. Your calculation may be slightly above or below the correct answer.
Choose the option that is closest.
14,400
7,200
5,882
5,090
Which of these voltage levels would be considered "main grid"?
138 kv
230 kv
69 kv
115 kv
Which of these voltage changes would be representative of a subtransmission substation?
230,000 to 138,000
69,000 to 12,000
345,000 to 230,000
13,800 to 345,000
Which of these voltage changes would be representative of a distribution substation?
69,000 to 12,000
230,000 to 500,000
24,000 to 500,000
500,000 to 345,000
Select the image where fuses protect the three-phase overhead tap.
A
B
C
D
The term
_ means more than one conductor per phase.
Corona
Bundled
Polymer
Suspension
Which of these voltage changes would be representative of a distribution substation?
500,000 to 345,000
69,000 to 12,000
24,000 to 500,000
230,000 to 138,000
Which element of the electrical system delivers common service voltages directly to a residential customer?
Generation
Distribution
Transmission
Subtransmission
This device might have a sectionalizer coordinated with it.
A
B
C
D
Which of these figures best describes electricity generated in the U.S. and Canada?
60 hz
50 cycles
7,200
90 degrees
Which statement best explains why transmission structures need to be larger?
The speed of the magnet is increased
Highter voltage requires more conductor seperation
There are two voltage values
Transmission system do not rely on a neutral
Calculate for ohms, given 120 volts and 12 amps.
0.1 ohms
10 ohms
1,200 ohms
1,440 ohms
Calculate for amps, given 60 watts and 120 volts.
7,200 amps
84,85 amps
0.5 amps
240 ohms
Calculate for volts, given 50 amps and 12 ohms.
4,167 volts
600 volts
208.333 volts
0.24 volts
