Get All Weeks Electric Power Systems Coursera Quiz Answers
Electric Power Systems Coursera Quiz Answers
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 a negative pole of a source towards the positive.
- Conventional current runs from the positive pole of a source towards 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 positve
- 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 follow 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?
- Comment Answer Below
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 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.
- Comment Answers Below
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 reliability of electrical service, redundancy is achieved by arranging ____ into several sections.
Comment Answers belowq
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 overlads
- Transformers
- Lockout
- Mechanism for electric arc suppresion
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.
- Comment Answers Below
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.
- Comment Answers Below
Q9. Unlike ___ ___, non-biomass renewable sources of energy do not directly emit greenhouse gases.
- Comment Answers Below
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
- 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.
- Power available is dependent on geography.
- Solar panels can have efficiency up to 70%.
- Large area is needed to generate power.
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