Question 1

Working on top of the nacelle or entering the hub during high winds should be avoided.

Accepted Answer

Working on top of the nacelle or entering the hub during high winds can be very dangerous and should be avoided to prevent accidents or injuries.

Question 2

A NOTAM is only used by the merchant marines for navigation data.

Accepted Answer

NOTAMs (Notice to Airmen) are used by aviation authorities and pilots to alert them to potential hazards or changes to aeronautical facilities or procedures. They are not used by merchant marines for navigation data as they operate on water, not in the air.

Question 3

Lightning does not present a hazard to technicians working in or around wind turbines.

Accepted Answer

Lightning can pose a hazard to technicians working in or around wind turbines. It is recommended that they stay in a safe location during thunderstorms and follow proper lightning safety procedures.

Question 4

A nacelle is used to protect the drive train and power generation components from the environment.

Accepted Answer

A nacelle is a structure that surrounds and protects the drive train and power generation components of a wind turbine from the environment, including wind, rain, and snow.

Question 5

The assembly process used to construct wind turbine blades is similar to that used for composite ________.&#10;A) boat hulls&#10;B) aircraft fuselage&#10;C) aircraft wings&#10;D) All answers are correct

Accepted Answer

The assembly process for wind turbine blades is similar to that used for composite boat hulls, aircraft fuselage, and aircraft wings, as all involve complex composite materials and techniques for strength and durability.

Question 6

Freezing rain can cause damage to external surfaces of the nacelle and blades.

Accepted Answer

Freezing rain can cause ice to accumulate on the external surfaces of the nacelle and blades, which can lead to increased weight and imbalance, as well as damage to the surface if the ice is not removed.

Question 7

Replacing stainless steel or galvanized fasteners with plain carbon steel fasteners can create a rust stain issue on the outside of the nacelle.

Accepted Answer

Stainless steel and galvanized fasteners have a higher resistance to rust than plain carbon steel. If plain carbon steel fasteners are used instead, they may rust and create a stain on the surface of the nacelle.

Question 8

OSHA regulations require fall arrest equipment withstand a minimum impact force of _______.&#10;A) 1,800 pounds (8 kN)&#10;B) 5,000 pounds (22.2 kN)&#10;C) 3,600 pounds (16 kN)&#10;D) 400 pounds (1.8 kN)

Accepted Answer

OSHA regulations specify that fall arrest equipment must be able to withstand a minimum impact force of 5,000 pounds (22.2 kN) to ensure the safety and protection of workers from falls.

Question 9

Access to external surfaces of a wind turbine can only be accomplished with a large crane.

Accepted Answer

Access to external surfaces of a wind turbine for maintenance or inspection can also be achieved using rope access techniques, platforms, or drones, not just large cranes.

Question 10

A ___________ may be encountered during a blade inspection.&#10;A) burn from a lightning strike&#10;B) stress crack or fracture&#10;C) delamination of the composite&#10;D) All answers are correct

Accepted Answer

All of the answer options are possible issues that could be encountered during a blade inspection. A blade could potentially have a burn from a lightning strike, a stress crack or fracture, or delamination of the composite material. Therefore, choice D is the best answer.

Question 11

Utility size wind turbine blades are only produced through a polymer extrusion process.

Accepted Answer

The answer of Utility size wind turbine blades are only...

Question 12

A wind turbine met mast is only used to support the aviation obstruction light.

Accepted Answer

The answer of A wind turbine met mast is only...

Question 13

Ice shedding from external surfaces of a wind turbine will not create safety hazards for technicians working at the base of the tower.

Accepted Answer

The answer of Ice shedding from external surfaces of a...

Question 14

A ___________ may be used to support personnel during inspection or maintenance of wind turbine external surfaces.&#10;A) suspended platform&#10;B) jet pack&#10;C) fire truck&#10;D) parachute

Accepted Answer

The answer of A ___________ may be used to support...

Question 15

The outer surface of a utility size wind turbine blade is made of ____________.&#10;A) steel&#10;B) aluminum&#10;C) composite sheets&#10;D) All answers are correct

Accepted Answer

The answer of The outer surface of a utility size...

Deck 15: External Surfaces