LCI Solar PV Paper 2

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Question 1 of 25

1. Question
1.When might a type B RCD be considered for the AC side of the PV system?
- When the inverter cannot prevent DC fault currents feeding into the AC side, the inverter is of the type that has a transformer, and an RCD is required to fulfil other requirements of BS7671
- When the inverter cannot prevent DC fault currents feeding into the AC side, the inverter is of the type that has a transformer, and an RCD is not required to fulfil other requirements of BS7671
- When the inverter cannot prevent DC fault currents feeding into the AC side, the inverter is of the transformer less type and an RCD is required to fulfil other requirements of BS7671
- d. When the inverter can prevent DC fault currents feeding into the AX side, the inverter is of the transformer less type and an RCD is required to fulfil other requirements of BS 7671.
Question 2 of 25

2. Question
2. When assessing the design of a roof integrated PV array what is one of the most important factors to consider?
- Length of DC cables
- Position of inverter
- Adequate gap under the modules for cooling
- Type of silicon used in module
Question 3 of 25

3. Question
3.When designing a photovoltaic system what provisions should be considered to prevent overheating?
- Array frame size
- DC cable runs
- Consumers gas consumption
- Ventilation to the panels
Question 4 of 25

4. Question
4. If a PV installation is to be installed with a rating above 16A per phase, which DSO document has to be complied with?
- G99 Only
- G98 Only
- G89 Only
- G98 and G99
Question 5 of 25

5. Question
5. When surveying a potential photovoltaic site what are the key considerations for an on-roof mounted systems?
- The type of slate and fixing, the wind uplift, The consumers self-consumption load profile
- The type of slate and fixing, the capacity of the DNO’s local transformer, the imposed load.
- The maximum demand of the consumers electrical system, the wind uplift, the imposed load.
- The type of slate and fixing, the wind uplift and associated correction factors, the imposed load.
Question 6 of 25

6. Question
6. What are the two type test standards for crystalline silicon terrestrial photovoltaic (PV_ modules and Thin Film that modules should be manufactured to?
- BS EN 60898 & BS EN 61215-1-1
- BS EN 61215-1-1 & BS EN 61215-1-4
- BS EN 60898 & EN 61215-1-4
- BS EN 14511 & EN 61215-1-4
Question 7 of 25

7. Question
7. Please identify the correct protection method in relation to undervoltage and undercurrent protection for AC circuits associated with PV array being connected via an inverter?
- Phase sequencing should be undertaken prior to connection
- Low voltage fuses must be fitted
- The inverter must be of an approved type to either G98 or G99
- No protection required.
Question 8 of 25

8. Question
8. What is the maximum cell efficiency for a Amorphous (thin film) cell in laboratory?
- 15%
- 12%
- 25%
- 21%
Question 9 of 25

9. Question
9. Select which of the following that are required to be completed when commissioning a solar PV system? (select 4 from the following)
- PV array test report
- Schedule of test results
- Periodic inspection report
- Module type test certificate
- Electrical installation certificate
- Schedule of items inspected
- Invoice
Question 10 of 25

10. Question
10. What is the minimum that should be available to undertake the service and maintenance of a solar PV system?
- Design information including expected performance, PV array test report.
- Electrical installation certificate, original invoice to the customer
- Previous Electrical installation condition report
- Design information including expected performance, Minor electrical installation works certificate.
Question 11 of 25

11. Question
11. When fitting modules to a system prior to completing the installation what would be the correct procedure to minimise shock risk?
- Leave the cables coiled up in the roof out of the clients sight
- Ensure all cables enclosed or terminated with no accessible live parts and place a warning notice to advise they are live
- Use the module box lids to cover the array so it doesn’t produce electricity
- Throw a blanket or similar over the array to stop it producing electricity
Question 12 of 25

12. Question
12. When commissioning a solar PV system array, which of the following statements correct?
- The array has to be able to withstand and wind uplift but only for systems on top of hills
- If doesn’t matter how many brackets are used as there is very little win uplift on any system.
- The array has to be able to withstand the wind uplift based on 1 bracket only.
- The array has to be able to withstand the wind uplift spread across all brackets
Question 13 of 25

13. Question
13. From the following images select the image which represents a “thin film” system?
- <img src="https://trydantraining.co.uk/wp-content/uploads/2024/09/Solar-Panels.jpg" alt= />
- <img src="https://trydantraining.co.uk/wp-content/uploads/2024/09/Thin-Film.webp" alt= />
- <img src="https://trydantraining.co.uk/wp-content/uploads/2024/09/Curtain-Wall.jpg" alt= />
Question 14 of 25

14. Question
14. Which one of the following modules is where the silicon is spread directly on a thin film?
- Polycrystalline
- Ribbon
- Monocrystalline
- Amorphous
Question 15 of 25

15. Question
15. Which one of the following would help reduce the risk of damaging your back when lifting?
- Follow manual handling guidance and use two people where necessary
- Ensure that you do not apply heat near your body.
- Only work on cabling that is terminated when there is a voltage present
- Only use a scaffolding that has been erected and tagged by a qualified scaffolder.
Question 16 of 25

16. Question
16. Which of part BS7671 covers the initial verification of a solar photovoltaics systems?
- 3
- 4
- 5
- 6
Question 17 of 25

17. Question
17. What is the difference between AC and DC current?
- Direct current is the energy used in a socket outlet whilst alternating current is used to produce light.
- In DC the electrons flow steadily in both directions or “Forward and then going “backwards”. In AC, electrons keep one direction, sometimes going “forwards”
- Actual Current (AC) is what is drawn from the socket outlet, whereas Directed Current (DC) is what is sent to the socket outlet.
- In DC, the electrons flow steadily in a single direction or going “forwards”. In AC, electrons keep switching directions sometimes going “forwards” and then going “backwards”.
Question 18 of 25

18. Question
18. Which one of the following would help reduce the risk of electric shock?
- Only work on cabling that is terminated when there is a voltage present
- Only use a scaffolding that has been erected and tagged by a qualified scaffolder
- Ensure that you do not apply heat near your body
- Follow manual handling guidance and use two people where necessary
Question 19 of 25

19. Question
19. G98 is the standard which must be adhered to on a grid connected system for which one of the following?
- Operating at 16 A or below per phase
- Not exceeding 32 A per phase
- Operating at 16 A or above per phase
- Not exceeding 20 A per phase
Question 20 of 25

20. Question
20. When receiving a consignment of solar panels what would be the correct procedure?
- Leave the consignment where they were delivered
- Store items in a safe location in the original manufacturer packaging
- Unwrap the panels to inspect them then replace the packaging and store in a safe location
- Ask the labourer to wrap them and put them and store them on the scaffold ready to be fitted
Question 21 of 25

21. Question
21. For systems where multiple strings combine into one DC array cable, which of the following formula shall be used to rate the DC cable from the combiner box to the PV inverter?
- DC current rating is = (M-1) x Isc (STC) x 1.15
- DC current rating is = (N-1) x Isc (STC) x 1.25
- DC current rating is ≤ M x Isc (STC) x 1.15
- DC current rating is ≤ N x Voc (STC) x 1.25
Question 22 of 25

22. Question
22. When are tracking systems most beneficial?
- When there are no other mounting options
- When there is a high proportion of direct irradiation
- When there is a low proportion of direct irradiation
- When there is a high proportion of diffuse irradiation
Question 23 of 25

23. Question
23. Which building regulation approved document covers moisture ingress?
- B
- C
- P
- A
Question 24 of 25

24. Question
24. From the following images select the image which represent a “in-roof” system?
- <img src="https://trydantraining.co.uk/wp-content/uploads/2024/09/Solar-Panels.jpg" alt= />
- <img src="https://trydantraining.co.uk/wp-content/uploads/2024/09/Thin-Film.webp" alt= />
- <img src="https://trydantraining.co.uk/wp-content/uploads/2024/09/Curtain-Wall.jpg" alt= />
Question 25 of 25

25. Question
25. What is the maximum cell efficiency for polycrystalline cell in a laboratory?
- 15%
- 25%
- 12%
- 21%

LCI Solar PV Paper 2

LCI Solar PV Paper 2

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