NABCEP Photovoltaic Associate
Practice Exam 100 Questions And
Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A Instant
Download Pdf
1. What is the primary function of a photovoltaic (PV) module?
A. Convert mechanical energy into electrical energy
B. Convert solar energy into electrical energy
C. Store electrical energy for later use
D. Regulate voltage in an AC circuit
Rationale: PV modules convert sunlight directly into electrical energy using
the photovoltaic effect, which is the core principle behind solar panels.
2. Which type of PV cell typically offers the highest efficiency under
standard test conditions?
A. Monocrystalline silicon
B. Polycrystalline silicon
C. Thin-film
D. Amorphous silicon
Rationale: Monocrystalline silicon cells have higher efficiency due to their
uniform crystal structure, typically ranging from 18–22% under standard test
conditions.
3. A system is rated at 5 kW DC. What does "DC" indicate?
,A. The system produces alternating current
B. The system produces direct current
C. The system has dual current capability
D. The system converts AC to DC
Rationale: DC stands for direct current, meaning the electricity flows in a
single direction, as produced by PV modules before conversion by an inverter.
4. What is the primary purpose of a solar inverter in a PV system?
A. Store energy for nighttime use
B. Convert DC electricity to AC electricity
C. Increase sunlight absorption
D. Protect modules from shading
Rationale: Inverters convert the DC electricity generated by PV modules into
AC electricity suitable for use in homes and on the utility grid.
5. Which of the following is considered a renewable energy source?
A. Coal
B. Natural gas
C. Solar energy
D. Nuclear energy
Rationale: Solar energy is renewable because it is naturally replenished daily,
unlike fossil fuels, which are finite.
6. What does the term "solar insolation" refer to?
A. The amount of solar radiation received per unit area
B. The temperature of a PV module
C. The voltage produced by a PV cell
D. The orientation of a solar array
Rationale: Solar insolation measures the power per unit area received from
the sun, usually expressed in kWh/m²/day or W/m².
, 7. Which orientation generally maximizes solar energy production in the
northern hemisphere?
A. South-facing
B. North-facing
C. East-facing
D. West-facing
Rationale: South-facing arrays receive the most sunlight throughout the day
in the northern hemisphere, optimizing energy production.
8. What is the typical lifespan of a PV module?
A. 5-10 years
B. 10-15 years
C. 25-30 years
D. 50-60 years
Rationale: Most PV modules are rated to last 25-30 years, though efficiency
may slightly decline over time.
9. Which device protects a PV system from overcurrent conditions?
A. Combiner box
B. Circuit breaker or fuse
C. Charge controller
D. Inverter
Rationale: Circuit breakers and fuses are overcurrent protection devices that
interrupt the circuit when current exceeds safe levels.
10.What is the typical efficiency range of commercially available crystalline
silicon PV modules?
Practice Exam 100 Questions And
Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A Instant
Download Pdf
1. What is the primary function of a photovoltaic (PV) module?
A. Convert mechanical energy into electrical energy
B. Convert solar energy into electrical energy
C. Store electrical energy for later use
D. Regulate voltage in an AC circuit
Rationale: PV modules convert sunlight directly into electrical energy using
the photovoltaic effect, which is the core principle behind solar panels.
2. Which type of PV cell typically offers the highest efficiency under
standard test conditions?
A. Monocrystalline silicon
B. Polycrystalline silicon
C. Thin-film
D. Amorphous silicon
Rationale: Monocrystalline silicon cells have higher efficiency due to their
uniform crystal structure, typically ranging from 18–22% under standard test
conditions.
3. A system is rated at 5 kW DC. What does "DC" indicate?
,A. The system produces alternating current
B. The system produces direct current
C. The system has dual current capability
D. The system converts AC to DC
Rationale: DC stands for direct current, meaning the electricity flows in a
single direction, as produced by PV modules before conversion by an inverter.
4. What is the primary purpose of a solar inverter in a PV system?
A. Store energy for nighttime use
B. Convert DC electricity to AC electricity
C. Increase sunlight absorption
D. Protect modules from shading
Rationale: Inverters convert the DC electricity generated by PV modules into
AC electricity suitable for use in homes and on the utility grid.
5. Which of the following is considered a renewable energy source?
A. Coal
B. Natural gas
C. Solar energy
D. Nuclear energy
Rationale: Solar energy is renewable because it is naturally replenished daily,
unlike fossil fuels, which are finite.
6. What does the term "solar insolation" refer to?
A. The amount of solar radiation received per unit area
B. The temperature of a PV module
C. The voltage produced by a PV cell
D. The orientation of a solar array
Rationale: Solar insolation measures the power per unit area received from
the sun, usually expressed in kWh/m²/day or W/m².
, 7. Which orientation generally maximizes solar energy production in the
northern hemisphere?
A. South-facing
B. North-facing
C. East-facing
D. West-facing
Rationale: South-facing arrays receive the most sunlight throughout the day
in the northern hemisphere, optimizing energy production.
8. What is the typical lifespan of a PV module?
A. 5-10 years
B. 10-15 years
C. 25-30 years
D. 50-60 years
Rationale: Most PV modules are rated to last 25-30 years, though efficiency
may slightly decline over time.
9. Which device protects a PV system from overcurrent conditions?
A. Combiner box
B. Circuit breaker or fuse
C. Charge controller
D. Inverter
Rationale: Circuit breakers and fuses are overcurrent protection devices that
interrupt the circuit when current exceeds safe levels.
10.What is the typical efficiency range of commercially available crystalline
silicon PV modules?
