CLC Lighting System Commissioning & Quality Assurance 2

Question 1

What is the correct method for measuring illuminance during commissioning according to IES standards?

Accepted Answer

Take measurements on a defined grid pattern at the specified work plane height

Answer

Take readings only directly beneath each luminaire

Answer

Measure only at task surfaces and ignore circulation areas

Answer

Take a single measurement at the brightest point in the space

Question 2

What does functional testing of a daylight harvesting control system primarily verify?

Accepted Answer

That the photosensor correctly adjusts electric light levels as daylight levels change

Answer

The R9 color rendering value of installed luminaires

Answer

The thermal performance of LED drivers under load

Answer

The emergency battery backup capacity of the system

Question 3

What is the purpose of 'burn-in' testing for new LED luminaire installations?

Accepted Answer

To allow initial operating hours that reveal early component failures before owner acceptance

Answer

To test the fire resistance rating of luminaire housings

Answer

To measure lumen depreciation over the fixture's full rated lifetime

Answer

To verify the IP rating by exposing fixtures to wet conditions

Question 4

During LED dimmer commissioning, which performance parameter is most critical to verify?

Accepted Answer

Smooth dimming without flicker, strobing, drop-out, or audible noise across the full range

Answer

The fixture's CRI rating at full light output

Answer

That photometric data matches published catalog specifications

Answer

That mounting height matches the design drawings

Question 5

What is the primary purpose of a lighting control narrative document?

Accepted Answer

To describe in plain language how the lighting control system should operate in each scenario

Answer

To record brand and model numbers of all installed control devices

Answer

To list the electrical panel schedules for all lighting circuits

Answer

To specify wiring diagrams for low-voltage control connections

Question 6

Which ASHRAE document is most directly relevant to the commissioning process for building systems including lighting?

Accepted Answer

ASHRAE Guideline 0

Answer

ASHRAE 62.1

Answer

ASHRAE 55

Answer

ASHRAE 90.1

Question 7

What is typically included in a lighting commissioning pre-functional checklist?

Accepted Answer

Verification that equipment is correctly installed, labeled, and accessible before functional testing begins

Answer

Only the energy cost projections for the completed lighting system

Answer

A complete photometric re-analysis of all installed fixtures

Answer

The warranty terms for each installed product