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NABCEP PRACTICE EXAM QUESTIONS with 100% Correct answers |Verified Solutions
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NABCEP PRACTICE EXAM QUESTIONS with 100% Correct answers |Verified Solutions
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NABCEP PRACTICE EXAM QUESTIONS with 100%Correct answers |Verified Solutions
Which is the best tilt angle for annual production in most of the USA? - ✔✔30 degrees
A 100kW STC system with 8% system loss, using PV that is +3 -0% production tolerance, a 95%
efficient inverter, what would be the expected ac output if 1000W/m² irradiance? (100kW ×
0.92 × 1 × 0.95 = ?) - ✔✔87.4kW
A 12V light is left on for 13 hours at 1.5A with a 12V battery. How much energy is used? (12V ×
1.5A × 13hrs = ?) - ✔✔0.234kWh
A 12V light is left on for 13 hours at 1.5A with a 12V battery. How many Ah are used? (A × hrs =
?) - ✔✔19.5Ah
Electrical safety is best studied at... - ✔✔OSHA website
The interconnection of a PV system is approved by... - ✔✔Utility
The National Electric Code (NEC) was published by... - ✔✔the National Fire Protection
Association (NFPA)
Grounding of a transformer-less PV system on a roof should be done to... - ✔✔racking and
aluminum frames
Lowest grid voltage... - ✔✔service equipment
If a 12V PV module has 36 cells, then how many volts is a 54-cell module? (12V/36cells) × 54
cells = ?) - ✔✔18V
, Transformers convert... - ✔✔high voltage and low current to low voltage and high current
(or vice versa)
Undersized PV array... - ✔✔decreases battery life
Decreased array size decreases battery life... - ✔✔due to not charging the battery fully
Bypass diodes - ✔✔limit effects of shading
Micro-inverters are connected between the_________________ and the
_____________________. - ✔✔PV module, service panel
A system that sits on a flat/low slope rooftop and has no penetrations is called a... -
✔✔ballasted system
According to OSHA, what is the required slope for an extension ladder? - ✔✔1:4
An off-grid installation has a 1HP pump that is on 10% of the time and a 20W light that is on
100% of the time. What is the energy use per month? - ✔✔68kWh
- ✔✔
What kind of ground faults do most inverters detect? - ✔✔DC
- ✔✔
Current carrying ability of a conductor (wire) is called... - ✔✔Ampacity
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