Page 1 of 103
Washington (WA) 7A Nonresidential Lighting
Maintenance & Retrofit Exam COMPLETE QUESTIONS
AND DETAILED SOLUTIONS LATEST UPDATE THIS YEAR-
JUST RELEASED
SUMMARIZED EXAM COVERAGE
• Lighting principles (lumens, lux, CRI, color temperature)
• LED and legacy lighting system technologies
• Electrical fundamentals for lighting circuits
• Lighting control systems (sensors, timers, automation)
• Retrofit methods and energy efficiency upgrades
• NEC and Washington energy code compliance
• Troubleshooting and maintenance procedures
• Electrical safety and LOTO practices
Q1
, Page 2 of 103
A commercial building has uneven lighting levels after a retrofit; what is the most likely cause?
A. Overuse of incandescent lamps
B. Incorrect lumen output selection for replacement LEDs
C. Excess voltage stability
D. Reduced occupancy sensor sensitivity
Answer: B
Rationale: Improper lumen matching causes uneven illumination.
Q2
A newly installed LED fixture flickers intermittently; what is the most likely issue?
A. Excess daylight harvesting
B. Incompatible LED driver or dimmer control
C. High CRI value
D. Increased lux levels
Answer: B
Rationale: LED flicker is commonly due to driver incompatibility.
Q3
, Page 3 of 103
What is the primary purpose of lux measurement in lighting design?
A. Measure electrical resistance
B. Measure illumination intensity on a surface
C. Measure voltage drop
D. Measure fixture weight
Answer: B
Rationale: Lux measures light intensity on surfaces.
Q4
A lighting system consumes high energy but provides low brightness; what is the most likely issue?
A. High CRI
B. Low efficacy (lumens per watt)
C. Excess voltage supply
D. Proper ballast operation
Answer: B
Rationale: Low efficiency reduces light output per watt.
Q5
, Page 4 of 103
What is the main advantage of LED lighting in commercial retrofits?
A. Higher heat output
B. Lower energy consumption and longer lifespan
C. Increased ballast use
D. Higher voltage requirement
Answer: B
Rationale: LEDs are energy efficient and long-lasting.
Q6
A fluorescent fixture continues to flicker after lamp replacement; what is the most likely cause?
A. High lumen output
B. Faulty ballast
C. Improved wiring
D. Excess lux levels
Answer: B
Rationale: Ballast failure causes flickering.
Q7
Washington (WA) 7A Nonresidential Lighting
Maintenance & Retrofit Exam COMPLETE QUESTIONS
AND DETAILED SOLUTIONS LATEST UPDATE THIS YEAR-
JUST RELEASED
SUMMARIZED EXAM COVERAGE
• Lighting principles (lumens, lux, CRI, color temperature)
• LED and legacy lighting system technologies
• Electrical fundamentals for lighting circuits
• Lighting control systems (sensors, timers, automation)
• Retrofit methods and energy efficiency upgrades
• NEC and Washington energy code compliance
• Troubleshooting and maintenance procedures
• Electrical safety and LOTO practices
Q1
, Page 2 of 103
A commercial building has uneven lighting levels after a retrofit; what is the most likely cause?
A. Overuse of incandescent lamps
B. Incorrect lumen output selection for replacement LEDs
C. Excess voltage stability
D. Reduced occupancy sensor sensitivity
Answer: B
Rationale: Improper lumen matching causes uneven illumination.
Q2
A newly installed LED fixture flickers intermittently; what is the most likely issue?
A. Excess daylight harvesting
B. Incompatible LED driver or dimmer control
C. High CRI value
D. Increased lux levels
Answer: B
Rationale: LED flicker is commonly due to driver incompatibility.
Q3
, Page 3 of 103
What is the primary purpose of lux measurement in lighting design?
A. Measure electrical resistance
B. Measure illumination intensity on a surface
C. Measure voltage drop
D. Measure fixture weight
Answer: B
Rationale: Lux measures light intensity on surfaces.
Q4
A lighting system consumes high energy but provides low brightness; what is the most likely issue?
A. High CRI
B. Low efficacy (lumens per watt)
C. Excess voltage supply
D. Proper ballast operation
Answer: B
Rationale: Low efficiency reduces light output per watt.
Q5
, Page 4 of 103
What is the main advantage of LED lighting in commercial retrofits?
A. Higher heat output
B. Lower energy consumption and longer lifespan
C. Increased ballast use
D. Higher voltage requirement
Answer: B
Rationale: LEDs are energy efficient and long-lasting.
Q6
A fluorescent fixture continues to flicker after lamp replacement; what is the most likely cause?
A. High lumen output
B. Faulty ballast
C. Improved wiring
D. Excess lux levels
Answer: B
Rationale: Ballast failure causes flickering.
Q7
