AZ L-94 Solar Photovoltaic
Contractor Exam Questions And
Correct Answers (Verified Answers)
Plus Rationale2026 Q&A| Instant
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1. What is the primary function of a solar photovoltaic (PV) system?
A. Generate heat from sunlight
B. Store electricity
C. Convert sunlight into electricity
D. Provide insulation
C. Convert sunlight into electricity
Rationale: Solar PV systems convert sunlight directly into electrical energy
using semiconductor materials.
2. Which semiconductor material is most commonly used in solar PV
cells?
A. Silicon
B. Copper
C. Aluminum
D. Iron
A. Silicon
Rationale: Silicon is widely used due to its efficiency, abundance, and
stability in photovoltaic applications.
3. What is the standard test condition (STC) for rating PV modules?
A. 25°C, 1,000 W/m², AM 1.5
, B. 20°C, 500 W/m², AM 1.0
C. 30°C, 1,200 W/m², AM 2.0
D. 25°C, 800 W/m², AM 1.5
A. 25°C, 1,000 W/m², AM 1.5
Rationale: STC provides a consistent reference for comparing PV module
performance under controlled conditions.
4. Which type of PV module generally has the highest efficiency?
A. Monocrystalline
B. Polycrystalline
C. Thin-film
D. Amorphous
A. Monocrystalline
Rationale: Monocrystalline cells are made from single-crystal silicon,
which allows for higher electron mobility and efficiency.
5. What is the typical voltage of a residential solar PV system?
A. 12 V
B. 24 V
C. 120/240 V
D. 480 V
C. 120/240 V
Rationale: Most residential systems are designed to integrate with standard
household electrical systems at 120/240 V.
6. Which component stores energy in a solar PV system for later use?
A. Inverter
B. Charge controller
C. Battery
D. Combiner box
C. Battery
Rationale: Batteries store electrical energy generated by the PV array for
use when sunlight is unavailable.
, 7. What is the purpose of an inverter in a PV system?
A. Convert AC to DC
B. Convert DC to AC
C. Store energy
D. Protect from overcurrent
B. Convert DC to AC
Rationale: Inverters convert the DC electricity produced by PV modules
into AC electricity suitable for home or grid use.
8. Which type of PV system operates without a connection to the utility
grid?
A. Grid-tied
B. Off-grid
C. Hybrid
D. Net-metered
B. Off-grid
Rationale: Off-grid systems are independent of the utility grid and rely on
battery storage to supply energy.
9. What does MPPT stand for in solar charge controllers?
A. Maximum Power Production Technology
B. Maximum Power Point Tracking
C. Multi-Phase Power Transformer
D. Minimum Power Protection Timing
B. Maximum Power Point Tracking
Rationale: MPPT optimizes the voltage and current to extract the
maximum power from the PV array under varying conditions.
10. Which factor most affects the efficiency of a PV module?
A. Module color
B. Temperature
C. Roof material
D. Wire size
Contractor Exam Questions And
Correct Answers (Verified Answers)
Plus Rationale2026 Q&A| Instant
Download Pdf
1. What is the primary function of a solar photovoltaic (PV) system?
A. Generate heat from sunlight
B. Store electricity
C. Convert sunlight into electricity
D. Provide insulation
C. Convert sunlight into electricity
Rationale: Solar PV systems convert sunlight directly into electrical energy
using semiconductor materials.
2. Which semiconductor material is most commonly used in solar PV
cells?
A. Silicon
B. Copper
C. Aluminum
D. Iron
A. Silicon
Rationale: Silicon is widely used due to its efficiency, abundance, and
stability in photovoltaic applications.
3. What is the standard test condition (STC) for rating PV modules?
A. 25°C, 1,000 W/m², AM 1.5
, B. 20°C, 500 W/m², AM 1.0
C. 30°C, 1,200 W/m², AM 2.0
D. 25°C, 800 W/m², AM 1.5
A. 25°C, 1,000 W/m², AM 1.5
Rationale: STC provides a consistent reference for comparing PV module
performance under controlled conditions.
4. Which type of PV module generally has the highest efficiency?
A. Monocrystalline
B. Polycrystalline
C. Thin-film
D. Amorphous
A. Monocrystalline
Rationale: Monocrystalline cells are made from single-crystal silicon,
which allows for higher electron mobility and efficiency.
5. What is the typical voltage of a residential solar PV system?
A. 12 V
B. 24 V
C. 120/240 V
D. 480 V
C. 120/240 V
Rationale: Most residential systems are designed to integrate with standard
household electrical systems at 120/240 V.
6. Which component stores energy in a solar PV system for later use?
A. Inverter
B. Charge controller
C. Battery
D. Combiner box
C. Battery
Rationale: Batteries store electrical energy generated by the PV array for
use when sunlight is unavailable.
, 7. What is the purpose of an inverter in a PV system?
A. Convert AC to DC
B. Convert DC to AC
C. Store energy
D. Protect from overcurrent
B. Convert DC to AC
Rationale: Inverters convert the DC electricity produced by PV modules
into AC electricity suitable for home or grid use.
8. Which type of PV system operates without a connection to the utility
grid?
A. Grid-tied
B. Off-grid
C. Hybrid
D. Net-metered
B. Off-grid
Rationale: Off-grid systems are independent of the utility grid and rely on
battery storage to supply energy.
9. What does MPPT stand for in solar charge controllers?
A. Maximum Power Production Technology
B. Maximum Power Point Tracking
C. Multi-Phase Power Transformer
D. Minimum Power Protection Timing
B. Maximum Power Point Tracking
Rationale: MPPT optimizes the voltage and current to extract the
maximum power from the PV array under varying conditions.
10. Which factor most affects the efficiency of a PV module?
A. Module color
B. Temperature
C. Roof material
D. Wire size
