AZ L-96 Wind Turbine Installer
Contractor Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationales 2027 Q&A | Instant
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1. What is the primary function of a wind turbine's rotor blades?
A. Store electrical energy
B. Convert wind energy into rotational mechanical energy
C. Increase generator voltage
D. Control the electrical grid frequency
Answer: B. Convert wind energy into rotational mechanical energy
Rationale: The blades capture kinetic energy from moving air and transfer
that energy to the rotor and drivetrain as mechanical rotation.
2. Which wind condition is generally most important when evaluating a
potential wind turbine site?
,A. Average annual wind speed
B. Average annual rainfall
C. Soil color
D. Daily temperature range
Answer: A. Average annual wind speed
Rationale: Long-term average wind speed is a fundamental factor in
estimating energy production and determining whether a site is
economically suitable.
3. What is the purpose of a wind turbine tower?
A. To store electricity
B. To support the rotor and nacelle at an appropriate elevation
C. To cool the transformer
D. To regulate utility voltage
Answer: B. To support the rotor and nacelle at an appropriate elevation
Rationale: The tower provides structural support and raises the rotor into
stronger, less turbulent winds.
4. Which component converts mechanical rotation into electrical energy
in a conventional wind turbine?
,A. Gearbox
B. Generator
C. Pitch actuator
D. Anemometer
Answer: B. Generator
Rationale: The generator converts mechanical energy from the rotating
drivetrain into electrical energy.
5. What is the main purpose of a turbine's nacelle?
A. Provide a foundation for the tower
B. House major drivetrain, generator, and control components
C. Store excess wind energy
D. Anchor underground cables
Answer: B. House major drivetrain, generator, and control components
Rationale: The nacelle contains equipment such as the gearbox, generator,
shafts, brakes, and control equipment, depending on turbine design.
6. What instrument is commonly used to measure wind speed?
A. Barometer
B. Anemometer
, C. Hygrometer
D. Ammeter
Answer: B. Anemometer
Rationale: An anemometer measures wind speed and is commonly
installed on meteorological towers and turbines.
7. What instrument is commonly used to determine wind direction?
A. Wind vane
B. Thermocouple
C. Manometer
D. Tachometer
Answer: A. Wind vane
Rationale: A wind vane indicates the direction from which the wind is
coming and assists with turbine orientation and site assessment.
8. What is the purpose of a turbine yaw system?
A. Adjust blade length
B. Rotate the nacelle to align the rotor with the wind
C. Increase foundation strength
D. Control transformer oil temperature
Answer: B. Rotate the nacelle to align the rotor with the wind
Contractor Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationales 2027 Q&A | Instant
Download Pdf
1. What is the primary function of a wind turbine's rotor blades?
A. Store electrical energy
B. Convert wind energy into rotational mechanical energy
C. Increase generator voltage
D. Control the electrical grid frequency
Answer: B. Convert wind energy into rotational mechanical energy
Rationale: The blades capture kinetic energy from moving air and transfer
that energy to the rotor and drivetrain as mechanical rotation.
2. Which wind condition is generally most important when evaluating a
potential wind turbine site?
,A. Average annual wind speed
B. Average annual rainfall
C. Soil color
D. Daily temperature range
Answer: A. Average annual wind speed
Rationale: Long-term average wind speed is a fundamental factor in
estimating energy production and determining whether a site is
economically suitable.
3. What is the purpose of a wind turbine tower?
A. To store electricity
B. To support the rotor and nacelle at an appropriate elevation
C. To cool the transformer
D. To regulate utility voltage
Answer: B. To support the rotor and nacelle at an appropriate elevation
Rationale: The tower provides structural support and raises the rotor into
stronger, less turbulent winds.
4. Which component converts mechanical rotation into electrical energy
in a conventional wind turbine?
,A. Gearbox
B. Generator
C. Pitch actuator
D. Anemometer
Answer: B. Generator
Rationale: The generator converts mechanical energy from the rotating
drivetrain into electrical energy.
5. What is the main purpose of a turbine's nacelle?
A. Provide a foundation for the tower
B. House major drivetrain, generator, and control components
C. Store excess wind energy
D. Anchor underground cables
Answer: B. House major drivetrain, generator, and control components
Rationale: The nacelle contains equipment such as the gearbox, generator,
shafts, brakes, and control equipment, depending on turbine design.
6. What instrument is commonly used to measure wind speed?
A. Barometer
B. Anemometer
, C. Hygrometer
D. Ammeter
Answer: B. Anemometer
Rationale: An anemometer measures wind speed and is commonly
installed on meteorological towers and turbines.
7. What instrument is commonly used to determine wind direction?
A. Wind vane
B. Thermocouple
C. Manometer
D. Tachometer
Answer: A. Wind vane
Rationale: A wind vane indicates the direction from which the wind is
coming and assists with turbine orientation and site assessment.
8. What is the purpose of a turbine yaw system?
A. Adjust blade length
B. Rotate the nacelle to align the rotor with the wind
C. Increase foundation strength
D. Control transformer oil temperature
Answer: B. Rotate the nacelle to align the rotor with the wind
