REP Wind Power Technologies 2

Question 1

What is the primary purpose of a wind turbine's pitch control system?

Accepted Answer

Adjust blade angle to optimize power output and prevent overspeed

Answer

Control the yaw direction of the nacelle

Answer

Regulate generator voltage output

Answer

Monitor wind speed at hub height

Question 2

Which wind turbine configuration places the rotor downwind of the tower?

Accepted Answer

Downwind turbine

Answer

Upwind turbine

Answer

Horizontal axis turbine

Answer

Darrieus turbine

Question 3

What does the term 'wake effect' refer to in a wind farm context?

Accepted Answer

Reduced wind speed and increased turbulence downstream of a turbine

Answer

The startup procedure after turbine shutdown

Answer

The electrical wake-up signal sent to dormant turbines

Answer

Morning fog that reduces turbine efficiency

Question 4

A wind turbine rated at 2 MW with a capacity factor of 35% would produce approximately how many MWh annually?

Accepted Answer

6,132 MWh

Answer

4,380 MWh

Answer

7,000 MWh

Answer

8,760 MWh

Question 5

What is the function of a nacelle in a horizontal-axis wind turbine?

Accepted Answer

Houses the gearbox, generator, and drive train components

Answer

Supports the foundation and anchors the tower

Answer

Stores excess electrical energy during low demand

Answer

Provides aerodynamic fairing for the tower

Question 6

Which foundation type is most commonly used for offshore wind turbines in shallow water (up to ~30 meters)?

Accepted Answer

Monopile

Answer

Floating spar-buoy

Answer

Tension-leg platform

Answer

Tripod jacket

Question 7

What is 'yaw error' in wind turbine operation?

Accepted Answer

Misalignment between the rotor axis and wind direction

Answer

Blade fatigue caused by uneven loading

Answer

Electrical phase imbalance in the generator

Answer

Excessive tower oscillation during high winds