Question 1

Mixing of grease formulations may cause a breakdown of lubricating properties.

Accepted Answer

Mixing different types or formulations of grease can cause a breakdown in lubricating properties, as the different ingredients may not be compatible with each other and can negatively impact the grease's ability to reduce friction and wear. It's important to always use the recommended grease for a specific application and avoid mixing different greases unless advised by the manufacturer.

Question 2

Visual inspection items for a generator may include: mounting hardware, bearing discoloration, and ___________.&#10;A) rotor slip ring condition&#10;B) lubricant texture and color&#10;C) paint color&#10;D) All answers are correct

Accepted Answer

Rotor slip ring condition, lubricant texture and color, and paint color are all visual inspection items for a generator.

Question 3

Component alignment activities during a maintenance cycle may include correction of ______.&#10;A) soft foot&#10;B) axial misalignment&#10;C) parallel misalignment&#10;D) All answers are correct

Accepted Answer

During a maintenance cycle, component alignment activities may include correction of soft foot, axial misalignment, and parallel misalignment. All three options are potential issues that can hinder machine performance and should be corrected during maintenance to prevent further damage or breakdowns.

Question 4

Insulation resistance testing of stator windings is a good predictive maintenance practice to track generator condition.

Accepted Answer

Insulation resistance testing helps to detect insulation deterioration and moisture ingress in stator windings, which are major contributors to generator failures. Regular testing can provide valuable information for scheduling maintenance activities and avoiding unexpected downtime.

Question 5

Dimension &#34;B&#34; input for the LASER alignment control unit is the distance between fasteners mounting the generator feet.

Accepted Answer

Dimension "B" in laser alignment typically refers to the distance from the front feet to the rear feet of the machine being aligned, not the distance between fasteners mounting the generator feet.

Question 6

The LASER stationary head should be mounted on the generator shaft for an alignment activity.

Accepted Answer

The LASER stationary head should not be mounted on the generator shaft for alignment; it is typically mounted on a stable part of the machinery being aligned, not on rotating components like the generator shaft.

Question 7

Never look directly at the LASER transmitter light because it can cause eye damage.

Accepted Answer

LASER (Light Amplification by Stimulated Emission of Radiation) emits highly concentrated beams of light that can cause permanent eye damage or blindness if stared at directly. It is important to always wear appropriate eye protection when working with or in close proximity to LASER devices.

Question 8

Visual indications a generator may be operating above the rated temperature specification include: discoloration or darkening of painted surfaces and melted informational decals.

Accepted Answer

Discoloration or darkening of painted surfaces and melted informational decals are both visual indications of a generator operating above the rated temperature specification.

Question 9

Generator misalignment may be seen during a visual inspection as damage to the shaft coupling or bearings.

Accepted Answer

Misalignment of a generator can cause damage to the shaft coupling or bearings, which can be identified during a visual inspection.

Question 10

Generic alignment steps include mounting the LASER heads and ______.&#10;A) reviewing MSDS for lubricant&#10;B) painting the gearbox&#10;C) measure distance between LASER heads&#10;D) All answers are correct

Accepted Answer

The generic alignment steps include mounting the LASER heads and measuring the distance between them. Reviewing MSDS for lubricant and painting the gearbox are not alignment steps.

Question 11

An approved LOTO procedure should be completed before inspecting power cable terminals in generator junction boxes.

Accepted Answer

The answer of An approved LOTO procedure should be completed...

Question 12

Wind turbine generators are classified as either permanent magnet or electromagnet designs.

Accepted Answer

The answer of Wind turbine generators are classified as either...

Question 13

Electrical maintenance activities for a generator may include checking wire connections and ____________.&#10;A) changing slip ring brushes&#10;B) checking ground connections&#10;C) testing winding insulation&#10;D) All answers are correct

Accepted Answer

The answer of Electrical maintenance activities for a generator may...

Question 14

All wind trubine manufaturers use forced air cooling systems for their generators.

Accepted Answer

The answer of All wind trubine manufaturers use forced air...

Question 15

Documentation on PM checklists typically include part number and __________.&#10;A) quantity of consumables&#10;B) service truck color&#10;C) age of the technician&#10;D) All answers are correct

Accepted Answer

The answer of Documentation on PM checklists typically include part...

Deck 13: Generator