Electrical & Lighting

Question 1

Coefficient of Utilization (CU)

Answer 1

• Ranges from 0.0-1.0
• Measures how much light from a fixture actually reaches a work plan
• Lower CU = Room geometry and room surface colors absorb more light on the way to work plane
• Higher CU = Room geometru and room surface colors absorb less light on the way to the work plane

Question 1

Zonal Cavity Method

Answer 1

Method of calculating a room’s Coefficient of Utilization

formula is in reference material provided on test

Question 2

Whats the equation for

Power (P) Equation

Answer 2

P = current x voltage
or
Watts or Volt-Amps = amps x volts