Deck 12: Drive Train

Question 1

Drive train assembly components will vary depending upon the wind turbine manufacturer or specific model.

Answer 1

True

Question 2

Performing a LOTO procedure before opening and inspecting junction boxes will eliminate an electrocution hazard.

Answer 2

True

Question 3

Clues that indicate bearing troubles may include: water mixed with the lubricant, metal particle deposits, and ___________.

A) chipped paint on the pillow block
B) discoloration due to elevated temperatures
C) ice on the blades
D) dialing 911

Answer 3

B

Question 4

Paint sampling of a gearbox is a good method for determining condition of the lubrication system.

Question 5

Purging existing grease from the main bearing assembly with several tubes of fresh grease is a good practice to ensure moisture and other contaminants are removed during each PM cycle.

Question 6

Gearbox oil sample documentation should include: date, technician's initials, and __________.

A) service vehicle make
B) computer operating system version
C) wind turbine number
D) gearbox ratio

Question 7

The gearbox main shaft may be hollow to enable _________ to connect to the hub pitch system.

A) power cables
B) communication wires
C) a hydraulic cylinder shaft
D) All answers are correct

Question 8

A three stage gearbox will have the output direction of rotation opposite the input direction.

Question 9

A compression coupling is used to attach the main shaft to the gearbox.

Question 10

Drive train assemblies that require the use of a power bolting tools to torque fasteners include: hub adapter, slip ring, and generator brushes.

Question 11

Safety hazards to consider when working around a wind turbine drive train include: entanglement, pinch, and ___________.

A) crush
B) electrocution
C) injection
D) All answers are correct

Question 12

Significant loss of lubricating oil from a gearbox sump assembly can cause a gearbox catastrophic failure.

Question 13

Increasing the temperature of lubricating oil causes it to decrease in volume.

Question 14

The parking brake is used as the primary means of stopping the wind turbine rotor for service activities.

Question 15

A ___________ is a wind turbine drive train component that requires replenishing fluid, changing oil filters, and inspecting for leaks.

A) gearbox
B) main shaft
C) flex coupling
D) All answers are correct