LLC Inspection & Quality Control 3

Question 1

When performing a thermal inspection of a low-voltage transformer, what temperature reading on a non-contact thermometer at the terminal block would indicate an OVERLOADED circuit?

Accepted Answer

Excessively hot (120°F or higher)

Answer

Terminal blocks running at 120°F or above signal excessive resistance from overload or poor connections, creating a fire and equipment failure risk.

Question 2

During a QC walkthrough at night, you notice that a moonlighting fixture in a large oak is producing uneven shadows. What adjustment should be made?

Accepted Answer

Reposition the fixture to a higher branch for a more natural angle

Answer

Moonlighting relies on positioning the fixture high in the canopy at a downward angle to mimic natural moonlight; a lower position produces harsh, unnatural shadows.

Question 3

A quality inspection finds that wire connectors used to splice two runs underwater in a pond are standard wire nuts. What is the CORRECT assessment?

Accepted Answer

Code violation — submersible-rated waterproof connectors or junction boxes must be used

Answer

Standard wire nuts are not rated for submersible use; NEC and manufacturer specifications require waterproof connectors or sealed junction boxes for any underwater or submerged connections.

Question 4

During final inspection, you verify fixture lumen output using a lux meter. What does a significantly lower-than-spec reading at a fixture MOST likely indicate?

Accepted Answer

Voltage drop, lamp failure, or a dirty/fogged lens reducing output

Answer

Low lux readings at a fixture typically point to insufficient voltage reaching the lamp, a failing lamp, or lens contamination reducing light output.

Question 5

A QC check on a newly installed system shows that two separate lighting zones are activating simultaneously even though they are wired to different transformer circuits. What is the MOST likely cause?

Accepted Answer

Wires from separate zones are inadvertently sharing a common neutral or are miswired at the transformer

Answer

Cross-connected neutrals or miswired terminals at the transformer are the most common cause of unintended simultaneous zone activation.

(LLC) Landscape Lighting Certification Practice Test

(LLC) Landscape Lighting Certification Practice Test

LLC Inspection & Quality Control 3