Certification Exam Practice Questions And

Siemens Gamesa Wind Turbine Technician Certification Exam Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• What is the primary purpose of the yaw system in a wind turbine?
• Adjust blade pitch
• Convert AC to DC
• Align the rotor with the wind direction
• Increase rotor frequency

The yaw system keeps the nacelle facing the wind to maximize power production.

• Which component converts mechanical rotational energy into electrical

energy?

• Pitch system
• Generator 1 / 3

• Gearbox
• Transformer

The generator converts shaft rotation into electrical output.

• What type of gearbox is most commonly used in large wind turbines?
• Harmonic drive
• Hypoid drive
• Planetary (epicyclic) gearbox
• Worm drive

Planetary gearboxes handle high torque loads efficiently.

4. The pitch system in a turbine is used mainly to:

• Stop rotor oscillations
• Change nacelle direction
• Regulate rotor speed and power output
• Store electricity

Pitch control adjusts blade angles to control speed and power.

• Which voltage level is most common within wind turbine internal

networks?

A. 480V DC

B. 690V AC

C. 220V AC

• 5kV AC

690V AC is a standard medium-voltage level for wind turbines. 2 / 3

• What is the main function of SCADA in wind turbines?
• Increase wind speed
• Remote monitoring and control
• Convert voltage
• Lubricate components

SCADA provides real-time operational oversight and control.

• Which fire suppression system is typically installed in wind turbines?
• Halon flooding
• CO₂ sprinklers
• Clean agent gas (e.g., FM-200)
• Water deluge

Clean agents are safe for electronics and effective in enclosed spaces.

8. Arc-flash PPE Category 2 requires a minimum arc rating of:

• 3 cal/cm²
• 8 cal/cm²
• 25 cal/cm²
• 40 cal/cm²

Category 2 specifies PPE ≥ 8 cal/cm².

• Which sensor monitors main shaft speed?
• Temperature sensor
• Encoder / tachometer
• Strain gauge
• / 3