All Weeks Solar Energy Systems Overview Coursera Quiz Answers
By the end of this course, learners will have acquired a broad understanding of the history and mechanics behind converting light into electricity, commonly known as photovoltaics (PV). They are empowered to recognize and describe elements of a PV system, enabling them to: compare the most common types of solar cells, sketch a solar PV system, and analyze differences between rooftop and ground mounting configurations.
The course explores economic considerations, touching on solar PV costs for residential and commercial use, incentives, and contrasts solar power with fossil fuel and nuclear plants.
This course is ideal for anyone interested in entering the solar power sector, whether fresh to the workforce or switching industries. The curriculum is especially useful for engineers, HVAC installers, architects, and building code inspectors.
Solar Energy Systems Overview Week 01 Quiz Answers
Solar Power Self-Check Quiz Answers
Q1. Where were Solar cells first produced?
Q2. Which country has the most PV on a per-capita basis?
- United States
Q3. Cloudy days still produce significant PV Energy. (T/F)
Q4. Discarded PV modules are hazardous to the environment.
Q5. The “Net Metering” incentive “banks” your excess energy with the utility. (T/F)
Solar Power Graded Quiz Answers
Q1. What country has installed the most PV?
Q2. Batteries ________________ (select all that apply)
- can “shave” electrical demand peaks.
- reduce use of Natural Gas Peaking plants.
- can supply a steady source of electricity.
Q3. PV Modules use _____________________ (select all that apply)
Q4. The net metering incentive is valued at the standard per kWh rate. (T/F)
Q5. What are the two least expensive forms of energy for most applications?
- Nuclear and Coal
- Photovoltaics and Wind
- Hydro Power and Geo-Thermal
Q6. Between 2015 and 2020, what was the largest United States PV market segment?
Q7. About how much solar energy does the earth’s land surface receive annually?
- 200 Trillion kWh
- 200,000 trillion kWh
- 200 Billion kWh
Q8. Wind Power is very site specific. (T/F)
Q9. Select the response that presents the solar history events in the correct order.
A: Solar cells used widely on spacecraft
B: Solar cell developed by Bell Labs
C: Price of solar cells decreased due to mass production
D: China entered solar market
- A, B, C, D
- B, A, D, C
- B, A, C, D
Q10. Select all solar energy incentives from the list below.
- Tax credits
- Net metering
- Accelerated depreciation
- Government buy-back of used equipment
- Cash rebates
Solar Energy Systems Overview Week 02 Quiz Answers
The Nature of PV Self-Check Answers
Q1. When added to crystalline silicon which element gives a negative charge?
Q2. A String Inverter has one or more high DC voltage inputs and outputs 208 or 240 VAC.
Q3. When bolting mounting racks to a roof, they must be attached to the roof rafters or trusses.
Q4. Ground mounting provides more options than roof mounting.
Q5. A ballasted mounting system prevents roof penetration on a flat roof.
The Nature of PV Graded Quiz Answers
Q1. When added to crystalline silicon, which element gives a positive charge?
Q2. Increasing PV cell area increases
Q3. A string inverter has one or more high DC voltage Inputs and usually adds controls, metering and safety features.
Q4. Which components are part of the “balance of system”
- Disconnect switches
- Cadmium telluride module
- Bilateral meter
- Polycrystalline module
- Grounding system
Q5. Standing seam roof mounts avoid roof penetration.
Q6. A typical roof mount with PV adds more than 6 pounds/sq.ft. of roof loading.
Q7. Ground mounting:
- Allows trackers to maximize yearly output
- Costs less than roof mounting
- Allows for the best orientation
- Can provide variable tilt
Q8. A stand-alone or off-grid system:
- Usually requires a battery bank
- Can only provide power for a few hours.
- Requires a generator
- Requires a charge controller
- Requires a different type of inverter than grid-tied systems
Q9. A microinverter:
- Mounts on the module or racking kit.
- Maximizes the power output of one (or two) PV modules
- Controls the charge going from the panel to batteries.
Q10. Select the option that best describes the flow of energy through a grid tied system.
- DC power from solar panels is converted to AC current by an inverter, then fed into a building’s electrical service panel, where it is distributed throughout the building.
- Power from solar panels is directed into an inverter where it is split into DC and AC power.
- AC power from solar panels is converted to DC current by an inverter, then fed into a building’s electrical service panel, where it is distributed throughout the building.
Q11. A solar cell converts light to electricity by exciting electrons in silicon cells.
Solar Energy Systems Overview Week 03 Quiz Answers
Solar Power ROI Self-Check Answers
Q1. What does PPA stand for?
- Power Purchase Agreement
- Personal Procurement Authorization
Q2. A PPA
- Results in system maintenance costs for the land owner during the lease term.
- Is a way to save money on large systems.
- Uses a developer’s money to buy a PV system.
Q3. PV system costs are currently (as of 2020)
Q4. To estimate PV system costs, the calculation should include permitting costs.
Q5. What is the federal tax incentive for solar PV in 2020?
Solar Power ROI Graded Quiz Answers
Q1. Financial benefits of a solar PV system are maximized by
Q2. Solar PV system costs are:
- Decreasing, as of 2020.
- Often lowered by government incentives.
- Reduced by using accelerated depreciation.
Q3. PV system costs include:
- Installation labor
- Design costs
- Permitting costs
Q4. Which of the following are additional PV system costs?
- Upgrading equipment to meet specifications
- Rental equipment
Q5. Solar power from a large plant costs less than $0.04/kWh.
Q6. Creating a new nuclear power plant is less expensive than solar power plant.
Q7. The primary reason that most business owners want solar power is:
- To save money and control costs.
- To improve their public image.
- To “go green” and save CO2.
Q8. An investment in solar PV:
- Is a higher-yield investment than a standard savings account.
- Can provide an ROI greater than 10%.
- Is good for 25 years or more.
- Requires no maintenance.
Q9. Solar fusion energy is preferred to nuclear fission because:
- Nuclear fission produces radioactive waste.
- Solar is more widely available.
- It is less expensive.
- It is lower risk.
Q10. Which factors should be included in a payback calculation for a residential customer?
- Estimated energy savings.
- Accelerated depreciation.
- Cost of system, less incentives.
Q11. PV output degrades by approximately what percent each year?
- 1% per year
- 0.5% per year.
- 0.1% per year
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