Deck 11: Machine Head

Question 1

Some wind turbine manufacturers locate the power conversion system and step up transformers within the nacelle.

Answer 1

True

Question 2

The term "Yaw" refers to motion about the horizontal axis of the tower.

Answer 2

False

Question 3

Inspection of the yaw drive units may include: addition of gear oil, checking mounting hardware, and ________.

A) checking for leaks
B) adjusting motor brake disk clearance
C) cleaning the assembly
D) All answers are correct

Answer 3

D

Question 4

The bedplate assembly is the main structural support within the nacelle.

Question 5

The machine head includes components such as the generator, drive train, yaw drive, and nacelle assembly.

Question 6

Visual inspection of the yaw drive sytem may include noting oil levels, checking wire connections, and a torque test of mounting fasteners.

Question 7

Maintenance activities within the wind turbine machine head may include: lubricating the yaw ring gear, inspection of the yaw drive units, and ____________.

A) washing the blades
B) painting the tower
C) tensioning foundation bolts
D) None of the answers are correct

Question 8

Disposing of waste lubricant around the tower foundation after a maintenance activity is an acceptable procedure.

Question 9

Processes used to fabricate the bed plate assembly include: casting and _________.

A) bolting
B) welding
C) machining
D) All answers are correct

Question 10

It is not necessary to review the MSDS of a new chemical before it is used on the job.

Question 11

Yaw brake designs fall into two catagories: hydraulic and active.

Question 12

The passive yaw brake plungers should always be torqued to their final level in a sequential pattern after inspection.

Question 13

Documenting each activity during a PM cycle provides proof the activity was completed and ensure steps are not missed.

Question 14

Non-destructive test methods may include: magnetic particle, visual, and ________.

A) dye penetrant
B) insulation resistance
C) Thermography
D) All answers are correct

Question 15

Inspection and maintenance of the power conversion system may include: clean cabinet surfaces, tighten cable connections, and ____________.

A) replace hoses
B) tighten hose clamps
C) LOTO procedure
D) All answers are correct