WTT Mechanical Systems 2

Question 1

What is the purpose of a yaw brake in a wind turbine?

Accepted Answer

To hold the nacelle in position against wind loads after yawing

Answer

The yaw brake locks the nacelle in the desired wind-facing orientation, preventing unwanted rotation from lateral wind forces.

Question 2

Which bearing type is most commonly used for the main shaft (low-speed shaft) in a wind turbine?

Accepted Answer

Spherical roller bearing

Answer

Spherical roller bearings accommodate shaft misalignment and handle both radial and axial loads, making them ideal for the main shaft.

Question 3

What does a negative pressure inside the nacelle typically indicate?

Accepted Answer

There is a proper pressure differential preventing moisture ingress

Answer

Slight negative (below ambient) pressure inside the nacelle ensures that airflow moves inward rather than outward, reducing moisture and contamination ingress.

Question 4

During a rotor lock procedure, the rotor lock pin engages with the:

Accepted Answer

Rotor lock disk on the main shaft or gearbox

Answer

The rotor lock pin inserts into holes on a dedicated lock disk attached to the main shaft or gearbox input, mechanically preventing rotation.

Question 5

What is the primary function of flexible couplings between the gearbox output and the generator?

Accepted Answer

Compensate for minor shaft misalignment and dampen torsional vibrations

Answer

Flexible couplings absorb misalignment and vibration between the gearbox output shaft and generator input, protecting both components.

(WTT) Wind Turbine Technician Certification Practice Test

(WTT) Wind Turbine Technician Certification Practice Test

WTT Mechanical Systems 2