Exam – Practice Test Questions And Correct
Answers (Verified Answers) Plus Rationales
2025/2026 Q&A | Instant Download Pdf
1. What is the primary renewable energy source used in solar PV systems?
Sunlight
Rationale: Solar photovoltaic systems convert sunlight directly into
electricity through semiconductor materials.
2. Which device converts DC electricity from solar panels into AC electricity
for household use?
Inverter
Rationale: Inverters are required because most household appliances and
the grid operate on AC power.
3. What is the typical efficiency range of modern crystalline silicon solar
panels?
15–22%
Rationale: Current technology achieves efficiencies within this range,
depending on cell type and manufacturer.
4. What is net metering?
A billing arrangement allowing customers to send excess electricity to the
, grid
Rationale: Net metering credits consumers for excess electricity they
produce and feed into the grid.
5. Which renewable energy source relies on flowing water to generate
electricity?
Hydropower
Rationale: Hydroelectric plants use turbines driven by water flow to
generate electricity.
6. Which type of solar system directly heats water for residential or
commercial use?
Solar thermal system
Rationale: Solar thermal collectors capture heat energy to heat water,
unlike PV systems that generate electricity.
7. What Florida agency regulates renewable energy policies and programs?
Florida Public Service Commission (PSC)
Rationale: The PSC oversees utilities and energy regulations, including
renewable integration.
8. Which federal agency offers tax incentives for renewable energy
installations?
Internal Revenue Service (IRS)
Rationale: The IRS administers renewable energy tax credits like the ITC
(Investment Tax Credit).
9. What is the main advantage of wind energy?
It produces electricity without emissions
, Rationale: Wind turbines generate clean energy with no direct
greenhouse gas emissions.
10.What is the typical lifespan of solar PV panels?
25–30 years
Rationale: Most manufacturers warranty panels for at least 25 years of
effective power output.
11.What is the function of a charge controller in a solar system?
Regulates voltage and current to prevent battery overcharging
Rationale: Charge controllers extend battery life and protect the system.
12.Which renewable energy source uses biomass as fuel?
Bioenergy
Rationale: Biomass (organic matter) can be burned or converted into
biofuels for power and heat.
13.Which type of geothermal system is most common for residential heating
and cooling?
Ground-source heat pump
Rationale: Ground-source heat pumps transfer heat to and from the
ground for efficient climate control.
14.What unit is used to measure solar panel output?
Watt (W)
Rationale: Solar panels are rated in watts, representing their maximum
output under standard test conditions.
15.What is the capacity factor of a power plant?
The ratio of actual output to maximum possible output over time