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NABCEP Associate Exam (retake) 106 Questions with Verified Solutions
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1NABCEP Associate Exam (retake) 106 Questions with Verified
Solutions.
1. UL 1741 - ANS Standards for inverters, converters, controller and
interconnections
2. UL 1703 - ANS Standard for safety, flute plate, Pave modules and panels
3. What PV panels are made from cylindrical silicon ingot - ANS
MONOCRYSTALLINE?
4. Residential Pave systems are limited to no more than 24 two-volt cells connected
in series - ANS 48V in total per NEC 690.71
5. Roof mounted systems are mounted on aluminum or stainless steel rail secured
into the roof trusses using - ANS Lag Bolts
6. Diagnosing a PV problem - ANS Stay safe, look at system first, turn things off
with disconnects, then take measurements
7. PV monitoring systems - ANS consists of a device that measures current and
voltage on ac output of the inviter
8. PV source circuits meets PV output circuits - ANS in the combiner box
9. The point on the IV curve where the MPPT is maximum - ANS is at the third point
10. Current is measured with - ANS millimeter with a clamp
11. ARC flashes inverters are equipped with - ANS arc fault detection
12. NEC - ANS contains which wire to use
13. OSHA - ANS Federal agency that establishes and enforces standards of safety
for the workplace
14. A restaurant uses 2200WH, 48 V dc, 4.9 PSH, and a Battery efficiency of 90%,
what is the Ah capacity needed? - ANS 2200WH/48V = 45.83 AH 45.83AH/.90 =
50.92 50.92/4.9 = 10.39
15. A restaurant uses 2WH and has 10 kWh in storage what can them operation? -
ANS They can operate all operations for days. 10 kWh is a lot of capacity
compared to your usage of 2 WH. First convert 10 kWh to 10,000 Who which is a
lot compared to 2 wh. Refer to section 7.4.0 of your NCCER book for more detail.
16. When you lock out a system you need to use - ANS engraving
17. What was a non-producing financial incentive for installing pave - ANS
REBATES?
18. PV system warranties are for - ANS 25 years
19. What amps would cause an installer if shocked not be able to let go - ANS over
10MA
, 2
22. What needs to be done to PV modules to prevent them from energizing and
causing shock - ANS they need be covered and the leads plugged together
23. Inverters use a digital display to indicate - ANS ambient temperature and voltage
output
24. Ground fault protection - ANS is located in the inverter
25. STC - ANS air mass of less than 1.5 spectral distribution
26. What point on curve has the most MPPT on IV curve - ANS the third point in the
graph?
27. Digital meter with clamp - ANS Ammeter
28. What is the benefit of putting modules on the ground instead of the roof - ANS
they are cooler
29. What is the maintenance required to do on the roof through the life of the system
- ANS replace brackets
30. You need what type of tools to prevent shock - ANS insulated tools
31. Items used for combining the output of grid tied battery inverter - ANS dc
disconnected between array and inverter
32. Diversion charge controller - ANS diverts electricity from fully charged batters to
load
33. Which information is covered in the scope of NEC - ANS national electrical code?
34. In a grid connected system PV array ground fault protection is normally included
as part of the - ANS interactive inverters
35. Which calculation is used to determine the overcurrent protection device installed
in a PV source circuit - ANS ISCx1.25
36. DC disconnect is required - ANS between the array and the inverter
37. AC disconnect is required - ANS between the inverter and the building service
panel
38. Which electrical agency has general authority over PV installation - ANS CITY?
39. To prevent arcing what is the most important measurement to take before
opening a module output connector - ANS voltage
40. Which is a direct effect of using dissimilar metals in a PV racking system - ANS
galvanic corrosion
41. Which of the following is most likely a maintenance item for a PV system in the
first five year following installation - ANS wash pollen or dust off module
42. Which piece of equipment should be installed between a string inverter installed
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