Electric Power Systems Coursera Quiz Answers – Networking Funda

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Electric Power Systems Week 01 Quiz Answers

All Self-Check Quiz Answers

Q1. Please choose the best answer(s) to the following statement: Atoms are composed of?

• Electrons
• Protons
• Neutrons
• Ions
• Molecules

Q2. What is the maximum number of electrons that can be accommodated in the innermost orbital shell?

• 2 electron

Q3. Which of the following statements are correct with respect to electrical charges?

(More than one answer may be correct)

• Electric charges of the same polarity attract one another
• Electric charges of differing polarity attract one another
• Electric charges of differing polarity repel one another
• Electric charges of the same polarity repel one another

Q4. Which of the following statements are correct?

(More than one answer may be correct)

• Electric current refers to the movement of electrons in a given direction.
• The charge on an electron is always negative.
• Conventional current runs from the negative pole of a source towards the positive.
• Conventional current runs from the positive pole of a source toward the negative
• Current only flows in conducting materials

Q5. Which out of the two statements is correct?

• Resistance impedes the flow of current
• The resistance of copper is 1000 Ohms

Q6. What is the unit of electrical resistance?

• Volts (V)
• Amperes/second (A/s)
• Ohms (Ω)
• Volts/meter (V/m)

Q7. The unit’s amp is named after an experimenter from?

• France
• Germany
• Italy
• USA

Q8. Electrical power (P) is proportional to the values of the _______ and _______.

• current; Watt
• voltage; current

Basic Electricity Quiz Answers

Q1. Determine whether the following statement is true or false.

Electricity is understood to be a form of energy comparable to other forms such as heat and light.

• False
• True

Q2. Please pick the best answer(s) to the following question:

Materials that contain very few free electrons are called?

• Insulators
• None of the above
• Non-conductors
• Conductors

Q3. The flow of electrons in a conductor go from:

• negative to positive
• East to West
• positive to negative
• North to South

Q4. A power supply provides power supplied from the AC network.

What is the specified voltage in North America currently?

• 110V
• 100V
• 130V
• 120V

Q5. Choose the best option(s) below that are included in a simple circuit:

• Consumer load
• All of the above
• Connections between the voltage source and the load
• A switch to open/close the circuit
• Voltage source

Q6. Please choose the best answer to fill in the blank.

A voltage can only exist between ________ points.

• three
• two
• four
• six

Q7. Please fill in the blanks to complete the sentence.

1W is the power generated by ______ at a DC Voltage of ______.

• 2V / 2A
• 1A / 1V
• 1V / 1A
• 2A / 2V

Q8. Ohm’s Law looks at the relationship between:

• V
• R
• I
• None

Q9. Please determine whether the following statement is true or false.

A DC voltage is a voltage of constant magnitude and direction.

• False
• True

Q10. The current produced by such voltage in a load (see question 9) is called the:

• alternating current (AC)
• direct current (DC)

Weeks 02 All Self-check Quiz Answers

Q1. Point inside a network where two or more lines meet are called a

• Bus
• Transformers
• Switchgear
• Alternator

Q2. It is much more economical to transmit electric power at large distances at higher voltages. True or False?

• True
• False

Q3. Most of the electricity in the United States is produced using

• A. Thermal generators
• B. Steam Turbines
• C. Renewable energy sources
• D. Both A and C

Q4. Which of the following is not a device that generates or produces electricity?

• Electrochemical Batteries
• Solar Photovoltaic Cells
• Thermoelectric Generators
• Fuel Cells
• None of the above

Q5. Which of the following is not a main interconnection for the U.S power system?

• Eastern Interconnection
• Western Interconnection
• Electric Reliability Council of Texas
• Southern Interconnection

Q6. What part of the utility system supplies distribution substations from bulk power sources?

• The part of the utility system that supplies distribution substations from bulk power sources is typically referred to as the “transmission system.” The transmission system is responsible for transmitting electricity from large power generation facilities (bulk power sources) to distribution substations where the voltage is lowered for further distribution to homes and businesses.

Q7. What organization develops and enforces mandatory grid reliability standards?

• North American Electric Reliability Corporation
• Federal Energy Regulatory Commission (FERC)
• ERCOT
• None of the above

Q8. ____ lines serve the bulk power system and ____ lines serve retail customers.

• Transmission; Distribution
• Distribution; Transmission
• Radial; Distribution
• Transmission; Subtransmission

Q9. Which of the following is an effect of replacing the existing grid infrastructure with a “smarter” one?

• It can be expensive
• It can become more susceptible to cyber security threats
• It can allow for new types of communication
• All of the above

Q10. What type of distribution is mostly underground?

• Urban
• Rural
• City
• None of the above

Generation, Transmission, & Distribution Quiz Answers

Q1. What are the three segments of the Electric Power System?

• Electric, Transmission, and Consumption
• Electric, Gas, and Oil
• Generation, Transmission, and Consumption
• Generation, Transmission, and Distribution

Q2. What is the function of the Generation system?

• To produce voltage
• To transport electricity from a distribution substation to the consumers’ meter
• None of the above
• To transport electricity from a step-up transformer to a distribution substation

Q3. Which of the following statements is correct?

• Renewable fuels are not considered to be “green”
• Non-renewable fuels exist in unlimited quantities
• Renewable fuels can be replenished in a relatively short period of time
• None of the above

Q4. Which fuel source produces most of the electric energy used in the U.S.?

• Natural Gas
• Nuclear
• Coal
• Oil

Q5. Which of the following statements is correct?

• Transmission lines run at high voltages appropriate for end-use
• Transmission lines do not run up to hundreds of miles
• Transmission lines aren’t mostly overhead
• Transporting electricity from the generating plants to the distribution pipeline is the function of the transmission system

Q6. Which system has a single power source for a group of distribution customers?

• Interconnected distribution networks
• Radial distribution networks

Q7. Insulators are used for which of the following? Check all that apply

• Protect equipment from one-time events, such as a falling tree branch.
• Protect equipment from lightning.
• Insulate structures from energized conductors.
• Insulate energized components from other equipment.

Q9. What statement about primary voltage in the U.S. is true?

• Primary voltage is distributed to customers at 120/240 single-phase
• None of the above
• Primary voltage is usually on the bottom of pole configurations
• 13.8 kV is the most common primary voltage y>

Q9. Rank the following items in order from highest to lowest voltage.

1. Secondary/Service Voltage

2. AAA battery voltage

3. Primary Voltage

4. Transmission voltage

• 1,2,3,4
• 4,3,1,2
• 4,3,2,1
• 1,2,4,3

Q10. Read the following statement and determine whether it is true or false:

When the voltage reduction occurs, this allows the utility to use smaller wires and shorter poles for distributing power to customers.

• True
• False

Weeks 03 All Self-check Quiz Answers

Q1. A ___ ___ is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by excess current.

• circuit breaker

Q2. Electrical power transmission networks are protected and controlled by

• High-voltage breakers.
• Medium-voltage breakers
• Low-voltage breakers
• Vacuum Circuit Breaker

Q3. Please select the locations where a Medium-voltage circuit breaker can be installed.

• Outdoors
• Substation
• Indoors

Q4. High voltage breakers are broadly classified by the medium used to extinguish the arc.

• True
• False

Q5. What is used to ensure that an electrical circuit is completely de-energized for service or maintenance?

• Disconnect switches
• Lockout-Tagout
• Circuit breakers
• Recloser

Q6. A grounding switch is a disconnect switch that has the ability to ground the isolated circuit. True or False?

• True
• False

Q7. Circuit breakers and disconnect switches are not equally capable of preventing the return of power, once they are opened and properly locked and tagged. True or False?

• True
• False

Q8. To ensure the reliability of electrical service, redundancy is achieved by arranging ____ into several sections.

• electrical systems

Q9. Incorrect operation of isolators can result in electric arcs. True or False?

• True
• False

Q10. Disconnect switches and circuit breakers are both capable of preventing the return of power once they are opened and properly locked and tagged.

• True
• False

System Design & Switching Quiz Answers

Q1. Which of the following is not a switch gear component?

• Circuit Breaker
• Grounding Breaker
• Surge arresters
• Busbar
• Switches

Q2. Fill in the blank with the correct answer

A ______ serves as a network node in physical terms and constitutes the start and end of individual lines.

• bus bar

Q3. How can a circuit breaker be reset?

• None of the above
• All of the above
• Manually
• Automatically

Q4. What do disconnect switches lack compared to circuit breakers?

• Lockable overloads
• Transformers
• Lockout
• Mechanism for electric arc suppression

Q5. Disconnect switches can trip open when it detects an over-current situation.

• True
• False

Q6. When can switches be operated?

• Only in a live state
• Only in a de-energized state
• Only in an energized state
• Only in an arcing state

Q7. Each Switch gear system and substation is divided into individual fields. Which option below is not one of the individual fields?

• Generator
• Circuit breaker
• Current Transformer
• Busbar

Q8. The purpose of a grounding switch is to _______ the circuit breaker and provide a mechanism to automatically close the breaker.

• protect

Q9. In relation to ensuring the reliability of electrical service, how is redundancy achieved?

• By arranging circuits in several sections.
• By arranging switches into several sections.
• By arranging Busbars into several sections.
• By arranging transformers into several sections.

Q10. What is the highest transmission voltage that high-voltage switches can handle?

• 2.5M Volts
• 1M Volts
• 3M Volts
• 2M Volts

Weeks 04 All Self-check Quiz Answers

Q1. If the grid were __ % more efficient, the energy savings would equate to permanently eliminating the fuel and greenhouse gas emissions from 53 million cars.

• 5%

Q2. Which of the following is a clean renewable source the U.S. can integrate into its grid to reduce its carbon footprint?

• Solar
• Wind
• Geothermal
• All of the above

Q3. The Smart Grid is expected to spur the kind of transformation that the ______ has already brought to our lives.

• Internet
• Telephone
• Radio
• Television

Q4. Which device is part of the Smart Grid?

• Wind Turbines
• Plug-in Hybrid electric vehicles
• Solar arrays
• Distributed Generation

Q5. The Smart Grid can reduce the need for some of the current infrastructure while keeping electricity reliable and affordable. True or False?

• True
• False

Q6. The electric power industry emits 20% of all the carbon dioxide we produce. True or False?

• True
• False

Q7. What can result from doing nothing about the current infrastructure?

• The incidence of massive and crippling blackouts will increase.
• Rates will increase dramatically to pay not only for electricity but also for increased transmission constraints.
• Running out of choices and time and drastically limiting our ability to meet future energy challenges.
• All of the above.

Q8. In 2016, about __ % of total U.S. energy consumption was from renewable energy sources.

• 10%

Q9. Unlike ___ ___, non-biomass renewable sources of energy do not directly emit greenhouse gases.

• biomass energy

Q10. Which of the following is a limitation of solar energy? Select all that apply.

• Solar energy systems do not produce air pollutants or carbon dioxide.
• The amount of sunlight that arrives at the earth’s surface is not constant.
• Solar energy systems on buildings have minimal impact on the environment.
• A large surface area is necessary to absorb or collect a useful amount of energy.

Renewable Energy & Smart Grid Technologies Quiz Answers

Q1. Fossil fuels have been a fundamental source of energy since its inception. Which of the following is not an argument for why we should change fuel sources?

• Supplies are running out
• Sustainable fuel sources are more reliable 24/7
• Balance of trade
• The use of fossil fuels contributes to global climate change

Q2. Which of the following is not a sustainable energy source?

• Coal
• Biomass
• Solar
• Geothermal

Q3. All renewable energy sources are sustainable.

• True
• False

Q4. Which of the following can be smart technologies? Choose all that apply.

• Automated thermostat
• Home area networks
• Sensors and measuring devices
• Meters that record interval data

Q5. Which of these adds the most carbon dioxide to the atmosphere?

• Wind
• Solar
• Hydroelectric
• They all add the same amount.

Q6. Which of the following does not derive its energy from the sun?

• Nuclear
• Wind
• Biomass
• Hydroelectric

Q7. Which of the following is enabled by smart grids? Choose all that apply.

• Distributed generation
• Validation of energy efficiency programs
• Automatic fault prevention, isolation, and restoration
• Condition-based preventative maintenance

Q8. Why should smart grid technologies be used? Choose all that apply

• It can increase consumer interaction with the grid
• It generates billions of data points from thousands of system devices from hundreds of thousands of customers
• It adds intelligence to all areas of the electric power system to optimize electricity use
• It diminishes the performance of the electric generation and distribution grid

Q9. Which of the following statements is true?

• Energy resources are equally available to all
• Sustainable energy has three key components: renewable energy, environmental effect, and energy efficiency.
• A renewable energy source is an energy source that can be used for centuries without depleting natural resources.
• Energy resources can vary in performance based on location.

Q10. Which of the following statements about solar power is false?

• The system has no moving parts.
• The power available is dependent on geography.
• Solar panels can have an efficiency up to 70%.
• A large area is needed to generate power.

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