Certified Apprentice Lighting Technician (CALT) Study Guide.docx

1-1 Light output is measured in ...? a) Footcandles b) Lumens c) Watts d) Electrons - correct answer b) Lumens 1-2 Rated lamp life is the time when ...? a) Lamps reach 20,000 hours of operation b) 1/2 of a large group of lamps are expected to have failed c) All lamps are expected to fail d) It's the best time to group relamp - correct answer b) 1/2 of a large group of lamps are expected to have failed 1-3 The Color Rendering Index is a scale that describes how accurately colors look when struck by the light from a given lamp. How is the scale defined? a) 0-100, with 0 being worst and 100 being best b) 0-75, with 0 being worst and 75 being best c) 0-100, with 100 being worst and 0 being best d) 0-75, with 75 being worst and 0 being best - correct answer a) 0-100, with 0 being worst and 100 being best 1-4 Which of the following is NOT a typical function of a lighting system? a) Ballast starts and operates the lamp b) Lamp produces light c) Ballast records energy consumption on an LCD display d) Luminaire controls the direction and intensity of the light coming out of the lamp - correct answer c) Ballast records energy consumption on an LCD display 1-5 Voltage is the "push" of electricity, which reaches resistance, and the resulting rate of flow of electric power down the line is called ...? a) Ballast starts and operates the lamp b) Lamp produces light c) Ballast records energy consumption on an LCD display d) Luminaire controls the direction and intensity of the light coming out of the lamp - correct answer d) The current 1-6 Which of the following is NOT one of the major families of lighting? a) Incandescent/Halogen b) Electroluminescent c) High-intensity discharge d) Fluorescent - correct answer b) Electroluminescent 1-7 The amount of electric power a lighting system draws is measured in ...? a) Watts b) Ohms c) Amps d) Volts - correct answer a) Watts 1-8 A lighting system's efficacy is measured in ...? a) Lumens/Watt b) Amps/Volt c) Lumens/kWh d) $/kWh - correct answer a) Lumens/Watt 1-9 Which is NOT one of the most important questions we typically need to ask to be able to understand and compare one lamp to another? a) How long does the lamp last? b) How much light does it produce? c) How much electricity does it require? d) What is its noise rating? - correct answer d) What is its noise rating? 1-10 ____ describes the gradual decline in a lamp's light output as it ages. a) Light efficacy b) Lamp consolidation c) Lumen depreciation d) Hours per start degradation - correct answer c) Lumen depreciation 1-11 A lamp with a very low color temperature is considered ...? a) Warm light source (reddish) b) Neutral light source (white) c) Cool light source (bluish) d) Energy-efficient - correct answer a) Warm light source (reddish) 1-12 A lamp's color rendering ability describes how well it can relatively ...? a) Prevent color shifting over time b) Raise color temperature over time c) Show colors accurately d) Produce light per unit of consumed energy - correct answer c) Show colors accurately 1-13 If a lamp is rated at 20,000 hours at three hours per start, this is the lamp life if the lamp is ...? a) Turned off and on quickly every three hours b) Left on for three hours and off for 15-20 minutes c) On for three hours and off for three hours d) None of the above - correct answer b) Left on for three hours and off for 15-20 minutes 2-1 A reflector fitted onto an incandescent lamp is used to ...? a) Increase color rendering ability b) Push light in a direction c) Make the lamp last longer d) Decrease heat produced by the lamp - correct answer b) Push light in a direction 2-2 In incandescent lamp typically converts _____% of its electrical input into light output.