Solar Energy Basics Coursera Answer

In this blog you will find the correct answer of the Coursera quiz Solar Energy Basics Coursera Answer mixsaver always try to brings best blogs and best coupon codes

Week- 1

Solar power systems <MATH>

1. Which of these energy sources are both renewable and dispatchable?

Nuclear/Uranium
Solar
Geothermal
Crude oil
Coal
Biomass
Wind
Hydroelectric

2. Electrical efficiency is defined as…

Power in divided by power out
Work created divided by power in
Heat out divided by heat in
Power out divided by power in

3. An air conditioner uses 1200 W and has a typical on-time of 4 hours per day. What is the typical daily energy use for this air conditioner?

3 kWh
4800 kWh
4.8 kWh
300 kWh
480 kWh

4. The output of a photovoltaic panel is measured as 165 W/m² under direct illumination of 860 W/m². What is the panel’s efficiency for converting light to electricity?

19.2%
16.5%
1.65%
21.5%
8.60%

5. What occurs when light strikes a solar panel?

Photons are created
Electrons are created
Electrons move through the circuit
Electrons exchange places with photons
Photons move through the circuit

6. Which components are required for an on-grid PV installation?

Charge controller
Bidirectional meter
Solar panels
Battery
Inverter

7. What factor(s) should be considered when designing a PV system?

Size of available roof or land area
Current electrical usage
Available incentives, credits, and rebates
Amount of annual sunlight

8. An off-grid homeowner currently uses propane for heat and electrical needs. What additional component(s) would be required for the homeowner to switch to PV-based electrical power?

Grid-tie connection
Battery bank
Bi-directional electrical meter
Charge controller

9. Why are inverters required on modern PV systems?

To provide metering for the utility
To convert direct current (DC) to alternating current (AC)
To convert light to electricity
To control charge/discharge

10. The National Electrical Code (NEC) in the United States covers all Photovoltaic related topics in …

NEC article 480
NEC article 690
NEC article 445
NEC article 700

11. What advantages might a ground mounted PV system have over a roof mounted system?

The ability to optimize tilt and rotation for geography
Increased roof material lifespan
Shading avoidance
Convenience of maintenance and repair

12. Which PV installation scenario(s) avoid puncturing the surface of a roof?

A barn with a 38º metal roof with raised standing seams
Ballasted array on the flat roof of a commercial building
A 30º shingled roof on a single family home
A pole mounted array in a field

13. Full sun or STC is based on what light intensity in W/m²?Enter answer here

1000

14 What is the correct sequencing of electrical components for an on-grid PV System design, going from an array on a roof to the main electrical panel in the house?

Array – DC Disconnect – Inverter – AC Disconnect – Main Panel
Array – AC Disconnect – Inverter – DC Disconnect – Main Panel
Array – Charge Controller – Inverter – AC Disconnect – Main Panel
Array – DC Disconnect – Inverter – Charge Controller – AC Disconnect – Main Panel

15. You are looking at a module specification sheet that contains the information below. What is the maximum power of this module in Watts to the nearest whole Watt?

Characteristic Value
Cell Type Monocrystalline Si
Cell Configuration 120
Voc 38 V
Isc 8.98 A
Vmp 31.4 V
Imp 8.29 A
Dimensions (mm/in) 1625 x 1020 x 45 mm / 64 ” x 40.1″ x 1.8 “
Weight 20 kg / 44 lbs

Enter answer here

260

16. For the module in question 15, what is the module efficiency as a percent to the nearest 0.1%?

Enter answer here

15.7

17. You see a solar array on the roof of a home in a residential neighborhood. The cells in the modules appear to have a uniform bluish-black color and are rectangular in shape with rounded corners. What type of PV material was most likely used in those solar panels?