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How to design and build a solar power system - Exam
  • 1. What is the first step in designing a solar power system?
A) Determine energy needs.
B) Purchase an inverter.
C) Install solar panels.
D) Apply for permits.
  • 2. What unit is used to measure the energy produced by a solar panel?
A) Volt
B) Ampere
C) Ohm
D) Watt
  • 3. What is an inverter's primary function in a solar system?
A) Store energy.
B) Convert AC to DC.
C) Regulate voltage.
D) Convert DC to AC.
  • 4. What type of battery is commonly used in off-grid solar systems?
A) Lithium-ion (only)
B) AAA battery
C) Deep cycle
D) Car battery
  • 5. What does MPPT stand for?
A) Minimum Power Point Tracking
B) Maximum Performance Panel Technology
C) Maximum Power Point Tracking
D) Minimum Performance Panel Technology
  • 6. What is solar irradiance?
A) Inverter size.
B) Panel efficiency.
C) Battery capacity.
D) Solar power per unit area.
  • 7. What is the ideal tilt angle for solar panels?
A) Latitude angle
B) 45 degrees
C) 0 degrees
D) 90 degrees
  • 8. What is the purpose of a charge controller?
A) Convert AC to DC.
B) Regulate battery charging.
C) Regulate AC voltage.
D) Convert DC to AC.
  • 9. What is the typical lifespan of a solar panel?
A) 5-10 years
B) 10-15 years
C) 50-60 years
D) 25-30 years
  • 10. What is a common safety hazard when working with solar systems?
A) Sunburn
B) Electrical shock
C) Falling debris
D) Mosquito bites
  • 11. What is a grid-tied solar system?
A) Standalone power source.
B) Using only battery storage.
C) Connected to the utility grid.
D) Powered by diesel generator.
  • 12. Which of the following is a type of solar panel?
A) Hydroelectric
B) Geothermal
C) Wind turbine
D) Monocrystalline
  • 13. What does NEC stand for in the solar industry?
A) North East Corridor
B) National Electrical Code
C) National Energy Council
D) New Energy Corporation
  • 14. What is the voltage of a typical residential solar panel?
A) Around 30-40V
B) 120V
C) 12V
D) 240V
  • 15. What is shading's effect on solar panel output?
A) Reduces output significantly.
B) Can increase output up to 50%
C) Increases output slightly.
D) Has no effect.
  • 16. What type of wire is best for solar panel connections?
A) Aluminum wire
B) Regular household wire
C) UV-resistant wire
D) Phone wire
  • 17. What is a kilowatt-hour (kWh)?
A) Unit of power
B) Unit of current
C) Unit of energy
D) Unit of voltage
  • 18. What is net metering?
A) Direct current electricity.
B) Measuring panel efficiency.
C) Credits for excess energy sent to grid.
D) Metering water usage.
  • 19. How is the size of a solar array determined?
A) Size of the inverter.
B) Local climate conditions only.
C) Number of batteries.
D) Energy consumption and available space.
  • 20. What is the purpose of grounding in a solar system?
A) Safety from electrical faults.
B) Improve panel efficiency.
C) Increase battery lifespan.
D) Reduce system cost.
  • 21. What is DC Disconnect?
A) Disconnect between battery and charge controller
B) Disconnect between panels and inverter.
C) Disconnect between grid and house
D) Disconnect between inverter and AC load
  • 22. What is the primary cause of solar panel degradation?
A) Excessive cleaning
B) Overuse of panels
C) Lack of sunlight.
D) Material degradation over time.
  • 23. What does ROI stand for in solar investment?
A) Risk of Implementation
B) Rate of Interest
C) Revenue on Income
D) Return on Investment
  • 24. Which material is commonly used in the semiconductor of a solar cell?
A) Copper
B) Silicon
C) Aluminum
D) Iron
  • 25. What is the benefit of a bi-facial solar panel?
A) Higher voltage output.
B) Smaller physical size.
C) Generates power from both sides.
D) Lower upfront cost.
  • 26. What is a string inverter?
A) Inverter powered by batteries only.
B) Inverter for off-grid systems only.
C) Inverter connected to a series of panels.
D) Inverter located on each panel.
  • 27. What is a microinverter?
A) DC to DC converter.
B) Large centralized inverter.
C) Battery powered inverter.
D) Inverter located on each panel.
  • 28. What is azimuth?
A) Voltage of solar panel.
B) Type of solar panel.
C) Tilt of solar panel.
D) Direction of solar panel facing.
  • 29. What is the main function of a combiner box?
A) Regulate the voltage.
B) Convert DC to AC power.
C) Store excess solar energy.
D) Combine multiple strings of panels
  • 30. Why is ventilation important for solar panel installation?
A) Prevents water damage.
B) Increases panel efficiency.
C) Reduces panel temperature.
D) Makes panels easier to clean.
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