New Curriculum First Term Solar PV Installation and Maintenance examination for JSS 1

Class: JSS 1
Term: First Term
Subject: Solar PV Installation and Maintenance
Time: 2 hours
Total Marks: 70

SECTION A: OBJECTIVES (40 Marks)
Instruction: Answer all 40 questions. Each question carries 1 mark.

1. Which explanation most accurately describes Solar photovoltaic systems? (a) Solar PV modules convert sunlight directly into electrical energy    (b) Solar cells generate direct-current electricity when illuminated    (c) An electrical load is a device that consumes electrical power    (d) Alternating current changes direction periodically whereas direct current flows mainly one way
2. In the context of Solar electricity generation, which statement is correct? (a) Solar PV modules convert sunlight directly into electrical energy    (b) An electrical load is a device that consumes electrical power    (c) Alternating current changes direction periodically whereas direct current flows mainly one way    (d) Solar cells generate direct-current electricity when illuminated
3. The concept of Electrical loads is best explained as ________. (a) Solar cells generate direct-current electricity when illuminated    (b) Alternating current changes direction periodically whereas direct current flows mainly one way    (c) An electrical load is a device that consumes electrical power    (d) Solar PV modules convert sunlight directly into electrical energy
4. An accurate description of Types of electric current is ________. (a) An electrical load is a device that consumes electrical power    (b) Alternating current changes direction periodically whereas direct current flows mainly one way    (c) AC supply periodically reverses polarity while DC maintains one polarity    (d) Solar cells generate direct-current electricity when illuminated
5. Which explanation most accurately describes AC and DC characteristics? (a) Alternating current changes direction periodically whereas direct current flows mainly one way    (b) AC supply periodically reverses polarity while DC maintains one polarity    (c) Load sizing estimates the power and energy required by connected appliances    (d) An electrical load is a device that consumes electrical power
6. In the context of Load sizing, which statement is correct? (a) Load sizing estimates the power and energy required by connected appliances    (b) AC supply periodically reverses polarity while DC maintains one polarity    (c) Electrical safety aims to prevent shock, burns and electrical damage    (d) Alternating current changes direction periodically whereas direct current flows mainly one way
7. The concept of Electrical safety is best explained as ________. (a) Insulating gloves and suitable footwear help reduce electrical hazards    (b) Load sizing estimates the power and energy required by connected appliances    (c) AC supply periodically reverses polarity while DC maintains one polarity    (d) Electrical safety aims to prevent shock, burns and electrical damage
8. An accurate description of Electrical PPE is ________. (a) Electrical safety aims to prevent shock, burns and electrical damage    (b) Electrocution is injury or death caused by electric current passing through the body    (c) Insulating gloves and suitable footwear help reduce electrical hazards    (d) Load sizing estimates the power and energy required by connected appliances
9. Which explanation most accurately describes Electrocution and first aid? (a) Insulating gloves and suitable footwear help reduce electrical hazards    (b) Safe PV handling requires secure equipment, sound wiring and controlled electrical work    (c) Electrocution is injury or death caused by electric current passing through the body    (d) Electrical safety aims to prevent shock, burns and electrical damage
10. In the context of Safe handling of PV materials, which statement is correct? (a) Electrocution is injury or death caused by electric current passing through the body    (b) Safe PV handling requires secure equipment, sound wiring and controlled electrical work    (c) Insulating gloves and suitable footwear help reduce electrical hazards    (d) Electrical safety aims to prevent shock, burns and electrical damage
11. A practical example relating to Solar photovoltaic systems is ________. (a) Using roof-mounted photovoltaic modules to supply a solar circuit    (b) Connecting a solar module to a suitable DC circuit    (c) Counting a lamp as part of a system’s total electrical demand    (d) Identifying battery output as direct current
12. During a practical lesson on Solar electricity generation, which observation is most relevant? (a) Using roof-mounted photovoltaic modules to supply a solar circuit    (b) Counting a lamp as part of a system’s total electrical demand    (c) Identifying battery output as direct current    (d) Connecting a solar module to a suitable DC circuit
13. Which of the following demonstrates Electrical loads correctly? (a) Connecting a solar module to a suitable DC circuit    (b) Identifying battery output as direct current    (c) Using roof-mounted photovoltaic modules to supply a solar circuit    (d) Counting a lamp as part of a system’s total electrical demand
14. Which situation best illustrates Types of electric current? (a) Counting a lamp as part of a system’s total electrical demand    (b) Identifying a typical household socket as an AC source    (c) Identifying battery output as direct current    (d) Connecting a solar module to a suitable DC circuit
15. A practical example relating to AC and DC characteristics is ________. (a) Identifying battery output as direct current    (b) Identifying a typical household socket as an AC source    (c) Adding the wattage of intended appliances when estimating total demand    (d) Counting a lamp as part of a system’s total electrical demand
16. During a practical lesson on Load sizing, which observation is most relevant? (a) Adding the wattage of intended appliances when estimating total demand    (b) Identifying a typical household socket as an AC source    (c) Switching off power before inspecting wiring    (d) Identifying battery output as direct current
17. Which of the following demonstrates Electrical safety correctly? (a) Switching off power before inspecting wiring    (b) Using proper insulating protective equipment for a supervised task    (c) Adding the wattage of intended appliances when estimating total demand    (d) Identifying a typical household socket as an AC source
18. Which situation best illustrates Electrical PPE? (a) Switching off power before inspecting wiring    (b) Calling for help and isolating power before assisting a shocked person    (c) Adding the wattage of intended appliances when estimating total demand    (d) Using proper insulating protective equipment for a supervised task
19. A practical example relating to Electrocution and first aid is ________. (a) Using proper insulating protective equipment for a supervised task    (b) Inspecting PV cables for damaged insulation before installation    (c) Calling for help and isolating power before assisting a shocked person    (d) Switching off power before inspecting wiring
20. During a practical lesson on Safe handling of PV materials, which observation is most relevant? (a) Calling for help and isolating power before assisting a shocked person    (b) Inspecting PV cables for damaged insulation before installation    (c) Using proper insulating protective equipment for a supervised task    (d) Switching off power before inspecting wiring
21. A pupil working on Solar photovoltaic systems should first consider ________. (a) Check load labels for the required supply type    (b) Position modules where they can receive adequate sunlight    (c) Distinguish AC and DC appliance ratings before connecting loads    (d) Use appliance ratings and operating duration in sizing decisions
22. The recommended procedure relating to Solar electricity generation is ________. (a) Assess sunlight exposure and electrical connections before operation    (b) Use appliance ratings and operating duration in sizing decisions    (c) Check load labels for the required supply type    (d) Isolate the supply before handling exposed conductors
23. Which action is most appropriate when applying Electrical loads? (a) Isolate the supply before handling exposed conductors    (b) Check that protective gear is appropriate and intact    (c) Use appliance ratings and operating duration in sizing decisions    (d) List appliances and their ratings before calculating required power
24. When carrying out Types of electric current, the correct approach is to ________. (a) Check that protective gear is appropriate and intact    (b) Position modules where they can receive adequate sunlight    (c) Distinguish AC and DC appliance ratings before connecting loads    (d) Isolate the supply before handling exposed conductors
25. A pupil working on AC and DC characteristics should first consider ________. (a) Never touch a casualty still in contact with a live electrical source    (b) Position modules where they can receive adequate sunlight    (c) Check load labels for the required supply type    (d) Assess sunlight exposure and electrical connections before operation
26. The recommended procedure relating to Load sizing is ________. (a) Assess sunlight exposure and electrical connections before operation    (b) Use appliance ratings and operating duration in sizing decisions    (c) Avoid working with exposed live connections and follow supervision    (d) Position modules where they can receive adequate sunlight
27. Which action is most appropriate when applying Electrical safety? (a) Isolate the supply before handling exposed conductors    (b) List appliances and their ratings before calculating required power    (c) Assess sunlight exposure and electrical connections before operation    (d) Distinguish AC and DC appliance ratings before connecting loads
28. When carrying out Electrical PPE, the correct approach is to ________. (a) Distinguish AC and DC appliance ratings before connecting loads    (b) List appliances and their ratings before calculating required power    (c) Check load labels for the required supply type    (d) Check that protective gear is appropriate and intact
29. A pupil working on Electrocution and first aid should first consider ________. (a) Check load labels for the required supply type    (b) Distinguish AC and DC appliance ratings before connecting loads    (c) Use appliance ratings and operating duration in sizing decisions    (d) Never touch a casualty still in contact with a live electrical source
30. The recommended procedure relating to Safe handling of PV materials is ________. (a) Use appliance ratings and operating duration in sizing decisions    (b) Check load labels for the required supply type    (c) Avoid working with exposed live connections and follow supervision    (d) Isolate the supply before handling exposed conductors
31. With respect to Solar photovoltaic systems, which practice is inappropriate? (a) Connecting a DC-only device directly to unsuitable AC without conversion    (b) Assuming photovoltaic modules produce their full output in complete darkness    (c) Assuming battery power and household AC supply are identical    (d) Choosing an undersized supply without calculating total power demand
32. Which practice is a likely mistake in Solar electricity generation? (a) Confusing energy generation by PV cells with storage in batteries    (b) Choosing an undersized supply without calculating total power demand    (c) Connecting a DC-only device directly to unsuitable AC without conversion    (d) Touching a live conductor with bare hands
33. A difficulty that should be avoided in Electrical loads is ________. (a) Ignoring a refrigerator’s power demand during load estimation    (b) Touching a live conductor with bare hands    (c) Treating ordinary wet cloth as reliable electrical insulation    (d) Choosing an undersized supply without calculating total power demand
34. Which action may lead to an unsatisfactory result in Types of electric current? (a) Treating ordinary wet cloth as reliable electrical insulation    (b) Assuming photovoltaic modules produce their full output in complete darkness    (c) Touching a live conductor with bare hands    (d) Assuming battery power and household AC supply are identical
35. With respect to AC and DC characteristics, which practice is inappropriate? (a) Pulling a victim away from live wires with unprotected bare hands    (b) Assuming photovoltaic modules produce their full output in complete darkness    (c) Connecting a DC-only device directly to unsuitable AC without conversion    (d) Confusing energy generation by PV cells with storage in batteries
36. Which practice is a likely mistake in Load sizing? (a) Confusing energy generation by PV cells with storage in batteries    (b) Choosing an undersized supply without calculating total power demand    (c) Connecting unidentified wires without checking polarity    (d) Assuming photovoltaic modules produce their full output in complete darkness
37. A difficulty that should be avoided in Electrical safety is ________. (a) Ignoring a refrigerator’s power demand during load estimation    (b) Touching a live conductor with bare hands    (c) Confusing energy generation by PV cells with storage in batteries    (d) Assuming battery power and household AC supply are identical
38. Which action may lead to an unsatisfactory result in Electrical PPE? (a) Treating ordinary wet cloth as reliable electrical insulation    (b) Assuming battery power and household AC supply are identical    (c) Ignoring a refrigerator’s power demand during load estimation    (d) Connecting a DC-only device directly to unsuitable AC without conversion
39. With respect to Electrocution and first aid, which practice is inappropriate? (a) Connecting a DC-only device directly to unsuitable AC without conversion    (b) Assuming battery power and household AC supply are identical    (c) Choosing an undersized supply without calculating total power demand    (d) Pulling a victim away from live wires with unprotected bare hands
40. Which practice is a likely mistake in Safe handling of PV materials? (a) Choosing an undersized supply without calculating total power demand    (b) Connecting a DC-only device directly to unsuitable AC without conversion    (c) Connecting unidentified wires without checking polarity    (d) Touching a live conductor with bare hands

SECTION B: THEORY (30 Marks)
Instruction: Answer any THREE questions. Each question carries 10 marks.

1. Answer the following questions.
(a) Explain Solar photovoltaic systems. (2 marks)
(b) Describe an example or application of Solar electricity generation and explain its importance. (4 marks)
(c) State one appropriate practice and one mistake to avoid concerning Electrical loads. Explain each. (4 marks)

2. Answer the following questions.
(a) Explain Types of electric current. (2 marks)
(b) Describe an example or application of AC and DC characteristics and explain its importance. (4 marks)
(c) State one appropriate practice and one mistake to avoid concerning Load sizing. Explain each. (4 marks)

3. Answer the following questions.
(a) Explain Electrical safety. (2 marks)
(b) Describe an example or application of Electrical PPE and explain its importance. (4 marks)
(c) State one appropriate practice and one mistake to avoid concerning Electrocution and first aid. Explain each. (4 marks)

4. Answer the following questions.
(a) Explain Solar electricity generation. (2 marks)
(b) Describe an example or application of Electrocution and first aid and explain its importance. (4 marks)
(c) State one appropriate practice and one mistake to avoid concerning Safe handling of PV materials. Explain each. (4 marks)

Objective Marking Scheme
Question 1 – ✅ (a) Solar PV modules convert sunlight directly into electrical energy
Question 2 – ✅ (d) Solar cells generate direct-current electricity when illuminated
Question 3 – ✅ (c) An electrical load is a device that consumes electrical power
Question 4 – ✅ (b) Alternating current changes direction periodically whereas direct current flows mainly one way
Question 5 – ✅ (b) AC supply periodically reverses polarity while DC maintains one polarity
Question 6 – ✅ (a) Load sizing estimates the power and energy required by connected appliances
Question 7 – ✅ (d) Electrical safety aims to prevent shock, burns and electrical damage
Question 8 – ✅ (c) Insulating gloves and suitable footwear help reduce electrical hazards
Question 9 – ✅ (c) Electrocution is injury or death caused by electric current passing through the body
Question 10 – ✅ (b) Safe PV handling requires secure equipment, sound wiring and controlled electrical work
Question 11 – ✅ (a) Using roof-mounted photovoltaic modules to supply a solar circuit
Question 12 – ✅ (d) Connecting a solar module to a suitable DC circuit
Question 13 – ✅ (d) Counting a lamp as part of a system’s total electrical demand
Question 14 – ✅ (c) Identifying battery output as direct current
Question 15 – ✅ (b) Identifying a typical household socket as an AC source
Question 16 – ✅ (a) Adding the wattage of intended appliances when estimating total demand
Question 17 – ✅ (a) Switching off power before inspecting wiring
Question 18 – ✅ (d) Using proper insulating protective equipment for a supervised task
Question 19 – ✅ (c) Calling for help and isolating power before assisting a shocked person
Question 20 – ✅ (b) Inspecting PV cables for damaged insulation before installation
Question 21 – ✅ (b) Position modules where they can receive adequate sunlight
Question 22 – ✅ (a) Assess sunlight exposure and electrical connections before operation
Question 23 – ✅ (d) List appliances and their ratings before calculating required power
Question 24 – ✅ (c) Distinguish AC and DC appliance ratings before connecting loads
Question 25 – ✅ (c) Check load labels for the required supply type
Question 26 – ✅ (b) Use appliance ratings and operating duration in sizing decisions
Question 27 – ✅ (a) Isolate the supply before handling exposed conductors
Question 28 – ✅ (d) Check that protective gear is appropriate and intact
Question 29 – ✅ (d) Never touch a casualty still in contact with a live electrical source
Question 30 – ✅ (c) Avoid working with exposed live connections and follow supervision
Question 31 – ✅ (b) Assuming photovoltaic modules produce their full output in complete darkness
Question 32 – ✅ (a) Confusing energy generation by PV cells with storage in batteries
Question 33 – ✅ (a) Ignoring a refrigerator’s power demand during load estimation
Question 34 – ✅ (d) Assuming battery power and household AC supply are identical
Question 35 – ✅ (c) Connecting a DC-only device directly to unsuitable AC without conversion
Question 36 – ✅ (b) Choosing an undersized supply without calculating total power demand
Question 37 – ✅ (b) Touching a live conductor with bare hands
Question 38 – ✅ (a) Treating ordinary wet cloth as reliable electrical insulation
Question 39 – ✅ (d) Pulling a victim away from live wires with unprotected bare hands
Question 40 – ✅ (c) Connecting unidentified wires without checking polarity

Theory Marking Scheme

Question 1:
(a) Solar PV modules convert sunlight directly into electrical energy (2 marks)
(b) Connecting a solar module to a suitable DC circuit; accept a relevant explanation consistent with the taught activity. (4 marks)
(c) Appropriate practice: List appliances and their ratings before calculating required power. Mistake to avoid: Ignoring a refrigerator’s power demand during load estimation. Award 2 marks for each explained point. (4 marks)

Question 2:
(a) Alternating current changes direction periodically whereas direct current flows mainly one way (2 marks)
(b) Identifying a typical household socket as an AC source; accept a relevant explanation consistent with the taught activity. (4 marks)
(c) Appropriate practice: Use appliance ratings and operating duration in sizing decisions. Mistake to avoid: Choosing an undersized supply without calculating total power demand. Award 2 marks for each explained point. (4 marks)

Question 3:
(a) Electrical safety aims to prevent shock, burns and electrical damage (2 marks)
(b) Using proper insulating protective equipment for a supervised task; accept a relevant explanation consistent with the taught activity. (4 marks)
(c) Appropriate practice: Never touch a casualty still in contact with a live electrical source. Mistake to avoid: Pulling a victim away from live wires with unprotected bare hands. Award 2 marks for each explained point. (4 marks)

Question 4:
(a) Solar cells generate direct-current electricity when illuminated (2 marks)
(b) Calling for help and isolating power before assisting a shocked person; accept a relevant explanation consistent with the taught activity. (4 marks)
(c) Appropriate practice: Avoid working with exposed live connections and follow supervision. Mistake to avoid: Connecting unidentified wires without checking polarity. Award 2 marks for each explained point. (4 marks)