Preventive Maintenance Procedures Flashcards

What is the recommended practice when replacing lamps in a multi-zone landscape lighting system to maintain consistent color temperature?

Answer: Replace all lamps in the system simultaneously with identical specifications

Group relamping with identical specifications ensures color consistency and prevents the mismatched appearance that results from mixing lamps at different stages of lumen depreciation.

A technician finds standing water inside a well light (in-ground fixture) during a PM visit. What is the first corrective step?

Answer: Drain the water, inspect the gasket and lens seal, and test the drainage holes if present

Water ingress into a well light indicates a seal failure; the gasket, lens, and drain holes must be inspected and repaired to restore the IP rating and prevent lamp failure.

During PM, why should a technician record load readings (total amperage draw) at the transformer and compare them to the original installation baseline?

Answer: To detect added or removed fixtures, failed lamps, or developing short circuits causing load changes

Load changes from the baseline indicate system modifications or faults such as short circuits, failed lamps, or unauthorized fixture additions that must be investigated.

What is the correct action when a transformer's primary-side GFCI or breaker trips repeatedly during normal operation?

Answer: Investigate for ground faults, moisture ingress, or overloading before resetting

Repeated tripping indicates a persistent ground fault or overload condition that must be diagnosed and corrected; bypassing or repeated resetting is unsafe.

How should a technician address a stainless steel fixture showing surface rust spots during a PM inspection?

Answer: Lightly clean with appropriate stainless steel cleaner and apply a protective coating; monitor for progression

Surface rust on stainless steel is usually cosmetic corrosion that can be cleaned and treated, but progression should be monitored to catch structural corrosion before failure.

What is the purpose of checking the mounting stake depth and angle on a path light during a preventive maintenance visit?

Answer: To ensure the fixture remains stable, upright, and correctly aimed after soil movement or frost heave

Frost heave, erosion, and soil settling can shift mounting stakes causing fixtures to lean or mis-aim, requiring periodic repositioning to maintain design intent.

When cleaning photovoltaic or solar-assisted landscape lighting sensors during PM, which cleaning agent is most appropriate?

Answer: Mild soap and water with a soft cloth, avoiding abrasives

Mild soap and water with a non-abrasive cloth cleans sensor surfaces without scratching the lens or leaving residues that degrade light transmission.