NABCEP PV ASSOCIATE EXAM AND RETAKE EXAM NEWEST 2024 ACTUAL EXAM 270 QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A+

1 | P a g e NABCEP PV ASSOCIATE EXAM AND RETAKE EXAM NEWEST 2024 ACTUAL EXAM 270 QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A+ NABCEP PV ASSOCIATE EXAM 2024 A 12V light is left on for 13 hours at 1.5A with a 12V battery. How much energy is used? - ANSWER- 0.234 kWh 12V * 1.5A * 13hr = 234 Wh A 12V light is left on for 13 hours at 1.5A with a 12V battery, how many Ah are used? - ANSWER- 19.5 Ah 1.5A * 13hrs Electrical safety is best studied where? - ANSWER- OSHA website The interconnection of a PV system is approved by? - ANSWER- The utility Grounding (bonding) of functionally grounded PV system on a roof should be done to - ANSWER- Racking and frames should be grounded on every PV system. Even ungrounded systems need equipment grounding 2 | P a g e Lowest grid voltage: A) Transmission B) Distribution C) Service equipment D) Generation - ANSWER- Service has the lowest voltage. Service voltage is the voltage at the building where the electricity is served If a 12 PV module has 36 cells, then how many volts in a 54 cell module? - ANSWER- 18 Volts 12V/36 cells to find V/cell V/cell * 54 cells = 18V Transformers convert - ANSWER- High voltage Low current to low Voltage high Current Undersized PV array: A) Decreases voltage drop B) Decreases battery life C) Increases current drop D) Increases resistance - ANSWER- Decreased array size decreases battery life (due to not charging battery fully) Not fully charging the battery is not good for the battery Bypass diodes: A) Reduce current 3 | P a g e B) Limit effects of shading C) Are wired in series with groups of solar cells and prevent reverse current D) Are in the combiner box - ANSWER- Bypass diodes reduce effects of shading and are wired in parallel in cells in the junction box on the back of the PV module Microinverters (and inverters) are connected between the ____ and the _____ - ANSWER- between the PV and the service panel A system that sits on a flat/low slope rooftop and has no penetrations is called a: A) Flush mounted system B) Flashed system C) BIPV system D) Ballasted system - ANSWER- Ballasted systems are common flat low slope roof systems that are not penetrating the roof. A ballast is something that is relatively heavy keeps the PV from blowing away Proper slope for an extension ladder? - ANSWER- 1:4 The primary source for a utility interactive PV system is the: A) Inverter B) Utility C) PV 4 | P a g e D) Charge controller - ANSWER- Utility. The interactive inverter will match the voltage and frequency of the utility What is specified on a charge controller? A) Irradiance limit B) Insolation limit C) Maximum voltage D) Minimum current - ANSWER- A charge controller will have maximum voltage specified (and so will most any equipment). A charge controller will also specify maximum current Units for irradiance - ANSWER- Irradiance is power per area, usually measured in watts per square meter. 1000W/m^2 is the irradiance level called Peak sun, or irradiance at STC. Energy per area is irradiation or insolation. What is used to calculate maximum system voltage? - ANSWERTemperature is used to calculate maximum system voltage along with Voc, the temperature coeffient of Voc and the number of PV modules connected in series. What will be increased by reflective surfaces (albedo)? - ANSWERCurrent. Reflections and increased light increases current. What is the best voltage for charging a 12V lead-acid battery? A) 12V