WTT Troubleshooting and Maintenance 2

Question 1

A wind turbine's vibration sensor triggers an alarm. What is the FIRST step a technician should take?

Accepted Answer

Review the SCADA data to identify which component shows abnormal vibration

Answer

Reviewing SCADA data first helps localize the vibration source before any physical inspection or shutdown decision.

Question 2

Which lubricant property is most critical when selecting grease for a main bearing operating in cold climates?

Accepted Answer

Low pour point

Answer

A low pour point ensures the grease remains pumpable and does not solidify at low ambient temperatures.

Question 3

A technician finds oil contamination in the gearbox breather vent. What does this most likely indicate?

Accepted Answer

Overfilling of gearbox oil beyond the maximum level

Answer

Overfilling the gearbox raises the oil level above the breather port, causing oil to be expelled during operation.

Question 4

During a scheduled inspection, a technician notices pitting on the surface of a gear tooth. This defect is classified as:

Accepted Answer

Micropitting

Answer

Micropitting appears as fine pits or frosted surfaces on gear teeth caused by surface fatigue under elasto-hydrodynamic lubrication conditions.

Question 5

When troubleshooting an intermittent pitch control fault, which tool provides the most useful real-time diagnostic information?

Accepted Answer

SCADA trend logging

Answer

SCADA trend logging captures timestamped data that helps correlate pitch faults with wind speed, temperature, and other operational parameters.

(WTT) Wind Turbine Technician Certification Practice Test