CLD Energy Codes 5

Question 1

Under ASHRAE 90.1, a 'vacancy sensor' differs from an 'occupancy sensor' primarily in that it:

Accepted Answer

Requires manual turn-on but turns lights off automatically when space is vacant

Answer

A vacancy sensor (manual-on/auto-off) requires an occupant to manually turn on the lights but switches them off automatically after the space is vacated.

Question 2

Which US federal regulation sets minimum efficacy standards for general service lamps sold in the country, complementing building energy codes?

Accepted Answer

DOE Lamp Rule under EPCA

Answer

The Department of Energy's lamp efficacy rules under the Energy Policy and Conservation Act (EPCA) set minimum lumens-per-watt requirements for general service lamps sold in the US.

Question 3

A designer is evaluating two control systems for a large office: System A uses scheduled time-clock shutoff only; System B adds occupancy sensing. Under ASHRAE 90.1, which is compliant for interior spaces over 2,500 sq ft?

Accepted Answer

System B only

Answer

ASHRAE 90.1 requires automatic shutoff for spaces over 2,500 sq ft; occupancy sensing satisfies this, and when combined with time-clock control it exceeds the minimum requirement.

Question 4

In ASHRAE 90.1's exterior lighting requirements, which application is classified as 'tradable' (subject to LPD limits) versus 'non-tradable' (separately regulated)?

Accepted Answer

Parking lot lighting is tradable; emergency egress lighting is non-tradable

Answer

ASHRAE 90.1 categorizes exterior lighting as tradable (can be redistributed among applications like parking and facades) and non-tradable (fixed applications like emergency egress that cannot offset other categories).

Question 5

A designer is specifying luminaires for a LEED v4 project that also must comply with ASHRAE 90.1-2016. LEED EAp2 (Minimum Energy Performance) requires compliance with which standard?

Accepted Answer

ASHRAE 90.1-2016 or local code, whichever is more stringent

Answer

LEED v4 EAp2 references ASHRAE 90.1-2010 as the baseline; however, many jurisdictions reference newer editions, and LEED requires compliance with the more stringent of the referenced standard or local code.

(CLD) Certified Lighting Designer Practice Test

(CLD) Certified Lighting Designer Practice Test

CLD Energy Codes 5