COLORADO SOLAR PHOTOVOLTAIC INSTALLER
CERTIFICATION EXAM QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) Q&A 2026
|INSTANT DOWNLOAD PDF
1. What is the primary function of a photovoltaic (PV) cell?
A. Convert AC power to DC power
B. Store solar energy as chemical energy
C. Convert sunlight into electrical energy
D. Increase voltage through induction
Correct Answer: C
Rationale: A photovoltaic cell converts sunlight directly into
electrical energy using the photovoltaic effect.
2. Which material is most commonly used in commercial PV
cells?
A. Copper
B. Silicon
C. Aluminum
D. Lithium
Correct Answer: B
Rationale: Silicon is the most widely used semiconductor
material in solar photovoltaic cells due to its efficiency and
availability.
,3. What does a solar inverter primarily do?
A. Stores energy in batteries
B. Converts DC electricity to AC electricity
C. Increases solar panel surface area
D. Reduces electrical resistance in wiring
Correct Answer: B
Rationale: Inverters convert DC power generated by PV
modules into AC power for use in homes and the grid.
4. Which of the following is the correct unit for electrical
current?
A. Volt
B. Watt
C. Ampere
D. Ohm
Correct Answer: C
Rationale: Electric current is measured in amperes (amps).
5. What is the purpose of a combiner box in a PV system?
A. Increase solar radiation
B. Combine multiple string outputs into one circuit
,C. Convert AC to DC
D. Store excess electricity
Correct Answer: B
Rationale: A combiner box merges multiple PV string outputs
into a single output circuit.
6. What safety device protects against overcurrent in PV
systems?
A. Inverter
B. Fuse or circuit breaker
C. Solar tracker
D. Charge controller
Correct Answer: B
Rationale: Fuses and circuit breakers interrupt excessive
current to prevent damage and fire hazards.
7. What is the main purpose of grounding in a PV system?
A. Increase system voltage
B. Improve panel efficiency
C. Protect against electric shock and lightning
D. Store electrical energy
Correct Answer: C
, Rationale: Grounding provides a safe path for fault current,
reducing shock and fire risk.
8. Which agency enforces electrical installation safety
standards in the U.S.?
A. OSHA
B. NEC (National Electrical Code)
C. EPA
D. DOT
Correct Answer: B
Rationale: The NEC sets electrical installation standards to
ensure safety and compliance.
9. What does VOC in PV systems stand for?
A. Voltage Output Current
B. Volt Operating Capacity
C. Open Circuit Voltage
D. Voltage Overload Control
Correct Answer: C
Rationale: Open Circuit Voltage is the maximum voltage when
no load is connected.
10. What is the purpose of a charge controller in PV systems?
CERTIFICATION EXAM QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) Q&A 2026
|INSTANT DOWNLOAD PDF
1. What is the primary function of a photovoltaic (PV) cell?
A. Convert AC power to DC power
B. Store solar energy as chemical energy
C. Convert sunlight into electrical energy
D. Increase voltage through induction
Correct Answer: C
Rationale: A photovoltaic cell converts sunlight directly into
electrical energy using the photovoltaic effect.
2. Which material is most commonly used in commercial PV
cells?
A. Copper
B. Silicon
C. Aluminum
D. Lithium
Correct Answer: B
Rationale: Silicon is the most widely used semiconductor
material in solar photovoltaic cells due to its efficiency and
availability.
,3. What does a solar inverter primarily do?
A. Stores energy in batteries
B. Converts DC electricity to AC electricity
C. Increases solar panel surface area
D. Reduces electrical resistance in wiring
Correct Answer: B
Rationale: Inverters convert DC power generated by PV
modules into AC power for use in homes and the grid.
4. Which of the following is the correct unit for electrical
current?
A. Volt
B. Watt
C. Ampere
D. Ohm
Correct Answer: C
Rationale: Electric current is measured in amperes (amps).
5. What is the purpose of a combiner box in a PV system?
A. Increase solar radiation
B. Combine multiple string outputs into one circuit
,C. Convert AC to DC
D. Store excess electricity
Correct Answer: B
Rationale: A combiner box merges multiple PV string outputs
into a single output circuit.
6. What safety device protects against overcurrent in PV
systems?
A. Inverter
B. Fuse or circuit breaker
C. Solar tracker
D. Charge controller
Correct Answer: B
Rationale: Fuses and circuit breakers interrupt excessive
current to prevent damage and fire hazards.
7. What is the main purpose of grounding in a PV system?
A. Increase system voltage
B. Improve panel efficiency
C. Protect against electric shock and lightning
D. Store electrical energy
Correct Answer: C
, Rationale: Grounding provides a safe path for fault current,
reducing shock and fire risk.
8. Which agency enforces electrical installation safety
standards in the U.S.?
A. OSHA
B. NEC (National Electrical Code)
C. EPA
D. DOT
Correct Answer: B
Rationale: The NEC sets electrical installation standards to
ensure safety and compliance.
9. What does VOC in PV systems stand for?
A. Voltage Output Current
B. Volt Operating Capacity
C. Open Circuit Voltage
D. Voltage Overload Control
Correct Answer: C
Rationale: Open Circuit Voltage is the maximum voltage when
no load is connected.
10. What is the purpose of a charge controller in PV systems?
