AK Wind Turbine Installer Exam Questions
and Correct Answers (Verified Answers)
Plus Rationale 2027 Q&A| Instant
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1. What is the primary function of a wind turbine rotor?
a. Store electrical energy
b. Convert electrical energy into mechanical energy
c. Convert wind energy into rotational mechanical energy
d. Regulate grid voltage
Rationale: The rotor captures kinetic energy from moving air and
converts it into rotational mechanical energy. This rotation is
transferred through the drivetrain or directly to the generator.
2. Which component directly supports the rotating turbine shaft in a
typical wind turbine?
a. Transformer
b. Nacelle cover
,c. Main bearing
d. Anemometer
Rationale: The main bearing supports the main shaft and allows it to
rotate while carrying substantial radial and axial loads generated by the
rotor.
3. What is the primary purpose of a wind turbine nacelle?
a. Anchor the foundation to bedrock
b. House major drivetrain and electrical components
c. Measure wind direction only
d. Store excess electricity
Rationale: The nacelle is the housing located at the top of the tower.
Depending on turbine design, it contains the gearbox, generator, shafts,
brakes, controls, and related equipment.
4. Which instrument is commonly used to measure wind speed?
a. Hygrometer
b. Barometer
c. Anemometer
d. Voltmeter
,Rationale: An anemometer measures wind speed. Wind turbines
commonly use anemometer measurements as part of their control and
monitoring systems.
5. What device determines wind direction for turbine control
purposes?
a. Tachometer
b. Wind vane
c. Ammeter
d. Manometer
Rationale: A wind vane detects wind direction. The turbine's yaw-
control system can use this information to orient the rotor
appropriately.
6. What is the primary purpose of a turbine yaw system?
a. Increase generator voltage
b. Control hydraulic pressure
c. Orient the nacelle and rotor toward the wind
d. Cool the transformer
Rationale: The yaw system rotates the nacelle around the tower axis so
that the rotor can be properly aligned with the prevailing wind
direction.
, 7. What is the primary function of pitch control on a wind turbine?
a. Change tower height
b. Adjust blade angle to control aerodynamic forces and power output
c. Increase cable insulation
d. Change generator frequency directly
Rationale: Pitch control changes the angle of the blades relative to the
incoming wind. It is used to regulate power production, limit loads, and
help shut the turbine down during excessive wind conditions.
8. Why must turbine blades be properly balanced?
a. To reduce tower height
b. To increase cable resistance
c. To minimize vibration and uneven mechanical loading
d. To eliminate the need for bearings
Rationale: Unequal blade mass or aerodynamic characteristics can
cause imbalance. Excessive imbalance produces vibration and cyclic
loads that can damage bearings, shafts, and other components.
9. What is the purpose of the turbine tower?
a. Convert AC into DC
b. Store hydraulic fluid
c. Elevate the rotor into a region with suitable wind conditions and
and Correct Answers (Verified Answers)
Plus Rationale 2027 Q&A| Instant
Download Pdf
1. What is the primary function of a wind turbine rotor?
a. Store electrical energy
b. Convert electrical energy into mechanical energy
c. Convert wind energy into rotational mechanical energy
d. Regulate grid voltage
Rationale: The rotor captures kinetic energy from moving air and
converts it into rotational mechanical energy. This rotation is
transferred through the drivetrain or directly to the generator.
2. Which component directly supports the rotating turbine shaft in a
typical wind turbine?
a. Transformer
b. Nacelle cover
,c. Main bearing
d. Anemometer
Rationale: The main bearing supports the main shaft and allows it to
rotate while carrying substantial radial and axial loads generated by the
rotor.
3. What is the primary purpose of a wind turbine nacelle?
a. Anchor the foundation to bedrock
b. House major drivetrain and electrical components
c. Measure wind direction only
d. Store excess electricity
Rationale: The nacelle is the housing located at the top of the tower.
Depending on turbine design, it contains the gearbox, generator, shafts,
brakes, controls, and related equipment.
4. Which instrument is commonly used to measure wind speed?
a. Hygrometer
b. Barometer
c. Anemometer
d. Voltmeter
,Rationale: An anemometer measures wind speed. Wind turbines
commonly use anemometer measurements as part of their control and
monitoring systems.
5. What device determines wind direction for turbine control
purposes?
a. Tachometer
b. Wind vane
c. Ammeter
d. Manometer
Rationale: A wind vane detects wind direction. The turbine's yaw-
control system can use this information to orient the rotor
appropriately.
6. What is the primary purpose of a turbine yaw system?
a. Increase generator voltage
b. Control hydraulic pressure
c. Orient the nacelle and rotor toward the wind
d. Cool the transformer
Rationale: The yaw system rotates the nacelle around the tower axis so
that the rotor can be properly aligned with the prevailing wind
direction.
, 7. What is the primary function of pitch control on a wind turbine?
a. Change tower height
b. Adjust blade angle to control aerodynamic forces and power output
c. Increase cable insulation
d. Change generator frequency directly
Rationale: Pitch control changes the angle of the blades relative to the
incoming wind. It is used to regulate power production, limit loads, and
help shut the turbine down during excessive wind conditions.
8. Why must turbine blades be properly balanced?
a. To reduce tower height
b. To increase cable resistance
c. To minimize vibration and uneven mechanical loading
d. To eliminate the need for bearings
Rationale: Unequal blade mass or aerodynamic characteristics can
cause imbalance. Excessive imbalance produces vibration and cyclic
loads that can damage bearings, shafts, and other components.
9. What is the purpose of the turbine tower?
a. Convert AC into DC
b. Store hydraulic fluid
c. Elevate the rotor into a region with suitable wind conditions and
