LLC Preventive Maintenance Procedures 2

Question 1

How often should landscape lighting fixtures be cleaned to prevent lumen depreciation caused by dirt and debris accumulation?

Accepted Answer

Annually or semi-annually depending on environment

Answer

Fixtures should be cleaned annually or semi-annually, with more frequent cleaning in dusty or coastal environments where contamination is accelerated.

Question 2

What is the primary reason for inspecting wire connections at junction boxes during preventive maintenance?

Accepted Answer

To detect corrosion, loose terminals, and moisture ingress that cause voltage drop

Answer

Corroded or loose connections create resistance that causes voltage drop, overheating, and potential fire hazards in landscape lighting systems.

Question 3

During a PM visit, a technician notices brown discoloration inside a fixture lens. What does this most likely indicate?

Accepted Answer

Heat damage from an oversized or incorrect lamp

Answer

Brown discoloration inside a fixture lens is a classic sign of heat damage caused by using a lamp with excessive wattage or incorrect type for that fixture.

Question 4

What multimeter reading should a technician record at each fixture tap during a PM to verify proper system voltage?

Accepted Answer

Voltage under load at the fixture terminals

Answer

Voltage under load at the fixture terminals reveals real-world operating conditions, including any voltage drop that resistance measurements alone would not show.

Question 5

When inspecting low-voltage cable buried in a landscape, what is the most important physical condition to look for?

Accepted Answer

Cuts, abrasion, or exposure caused by edging, aerating, or animal activity

Answer

Physical damage from landscaping tools or animal gnawing is the leading cause of cable faults and must be identified and repaired during PM inspections.

(LLC) Landscape Lighting Certification Practice Test

(LLC) Landscape Lighting Certification Practice Test

LLC Preventive Maintenance Procedures 2