LLC Inspection & Quality Control 2

Question 1

During a post-installation inspection, you discover that several path light fixtures are tilted more than 15 degrees from vertical. What is the MOST appropriate corrective action?

Accepted Answer

Re-stake and level each fixture to within 5 degrees of vertical

Answer

Fixtures tilted more than 5-10 degrees from vertical distribute light unevenly and look unprofessional; re-staking corrects the issue without replacing hardware.

Question 2

When inspecting low-voltage landscape wiring connections, which condition indicates a FAILING connection that requires immediate repair?

Accepted Answer

Green or white corrosion buildup on terminals

Answer

Green or white corrosion indicates oxidation that increases resistance, reduces voltage, and can cause heat buildup or fixture failure.

Question 3

A quality control check reveals that the measured voltage at the furthest fixture on a 150-foot run is 10.2V when the transformer output is 12V. What does this indicate?

Accepted Answer

Excessive voltage drop requiring wire upsizing or hub relocation

Answer

A drop to 10.2V (1.8V loss) on a 12V system exceeds the acceptable 10% drop threshold, indicating the wire gauge is insufficient or the run is too long.

Question 4

During an inspection, a timer-controlled transformer fails to activate at the programmed dusk time. What should be checked FIRST?

Accepted Answer

Photocell sensor for obstruction or damage

Answer

A blocked or damaged photocell is the most common cause of timing failures; it overrides or conflicts with the programmed schedule.

Question 5

Which inspection method BEST verifies that buried landscape wire is installed at the correct depth per NEC Article 411 requirements?

Accepted Answer

Probing the soil with a calibrated depth rod along the wire route

Answer

Using a depth rod along the wire path is the only reliable field method to confirm that cable is buried at the NEC-required minimum depth of 6 inches.

(LLC) Landscape Lighting Certification Practice Test

(LLC) Landscape Lighting Certification Practice Test

LLC Inspection & Quality Control 2