TheorySolar PV Professional Exam Practice Questions
Free Solar PV Professional Exam practice questions with answers and plain-English explanations. Browse the PDF, video and online mock test.
Solar PV Professional Exam Questions
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Q1According to OSHA requirements, at what height is fall protection required when installing rooftop PV systems?
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✓ Correct answer: 6 feet
OSHA requires fall protection for workers at heights of 6 feet or more in construction activities, which includes PV installation on rooftops.
Q2What is the required minimum bending radius for PV source circuit conductors in conduit as per NEC 2017?
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✓ Correct answer: At least 8 times the diameter of the conductor
NEC 2017 specifies that the minimum bending radius for PV source circuit conductors in conduit should be at least 8 times the diameter of the conductors to prevent damage to insulation.
Q3Which of the following is required when installing a roof-mounted PV array to maintain the fire classification of a roof?
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✓ Correct answer: Providing a minimum 3-foot wide clear access pathway from eave to ridge
To maintain a roof's fire classification, a minimum 3-foot wide clear access pathway from eave to ridge is required as per fire code requirements for PV installations.
Q4When installing a DC-coupled battery system with a PV array, what safety procedure is required before connecting the battery to the system?
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✓ Correct answer: Verifying that all breakers and disconnects are in the open position
Verifying that all breakers and disconnects are open is a critical safety procedure before connecting a battery to prevent unintended energization and potential electrical hazards.
Q5Which of the following markings is required on PV system disconnecting means according to NEC 2017?
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✓ Correct answer: 'PV SYSTEM DISCONNECT'
NEC 2017 requires that all PV system disconnecting means be permanently marked as 'PV SYSTEM DISCONNECT' for clear identification during maintenance or emergency situations.
Q6According to NFPA 70E, what is required for working on energized PV systems?
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✓ Correct answer: An energized electrical work permit
NFPA 70E requires an energized electrical work permit when working on energized PV systems to ensure proper risk assessment and safety protocols are followed.
Q7When installing a ground-mounted PV array, what is the minimum burial depth required for direct burial conductors?
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✓ Correct answer: 24 inches
NEC requires a minimum burial depth of 24 inches for direct burial conductors to protect them from physical damage and meet code compliance.
Q8What is the correct method for bonding microinverters to the PV module racking system?
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✓ Correct answer: Using the manufacturer's specified hardware and torque specifications
Using the manufacturer's specified hardware and torque specifications ensures proper bonding of microinverters to the racking system, maintaining electrical continuity and safety.
Q9When installing a rapid shutdown system for a residential PV installation, at what distance from the array must voltage be reduced according to NEC 2017?
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✓ Correct answer: Within 1 foot of the array
NEC 2017 requires that PV system conductors more than 1 foot from the array must be reduced to 30V or less within 30 seconds during rapid shutdown.
Q10What is the maximum allowable temperature rating for conductors in a combiner box that can reach 60°C under normal operation?
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✓ Correct answer: 75°C
Conductors used in a combiner box that can reach 60°C should have a temperature rating of at least 75°C to ensure safe operation and prevent insulation degradation.
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