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This study guide provides questions and answers related to the nalmco certified apprentice lighting technician (calt) certification. It covers topics such as light output measurement, lamp life, color rendering index, lighting system functions, electrical power measurement, lamp families, and lamp characteristics. The guide includes questions on incandescent, halogen, and fluorescent lamps, as well as ballasts and energy-efficient lighting. It is designed to help technicians prepare for the calt exam and enhance their understanding of lighting technology.
Typology: Exams
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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
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
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
Incandescent lamps are rated to provide only ___ hours of service life, so when we want an incandescent lamp but we want it to last longer, we can choose a long-life incandescent lamp, which provides ___ hours of service life. a) 2000 ; 4000 b) 1000 ; 4000 c) 750 - 1000 ; 1500 - 3000 d) 800 - 2000 ; 2000 - 4500 - correct-answer- c) 750 - 1000 ; 1500 - 3000 2 - 4 Rough service lamps are resistant to ...? a) Color shift b) Line voltage variations c) Shock and vibration d) Wide range of ambient temperatures - correct-answer- c) Shock and vibration 2 - 5 Clear incandescent lamps are a ...? a) Point source b) Linear source - correct-answer- a) Point source 2 - 6
Which of the following is NOT an advantage of incandescent lamps? a) No ballast required b) Lowest initial cost c) High energy efficiency compared to fluorescent d) Easy to dim - correct-answer- c) High energy efficiency compared to fluorescent 2 - 7 If we have an incandescent lamp with the designation 65BR30, what is its wattage? a) 30W b) 65W c) R class d) 3 - 2/3 - correct-answer- b) 65W 2 - 8 MOL stands for ...? a) Maximum overall light b) Maximum overall length c) Minimum overall light d) Minimum overall length - correct-answer- b) Maximum overall length
If we see 75PAR30/HAL/SP10 as a lamp designation, which of the following statements do we know to be true about the lamp? a) 30W b) 10W c) 3 3/4 inches in diameter d) 9 - 3/8 inches in diameter - correct-answer- c) 3 3/4 inches in diameter 3 - 1 The best way to describe an energy-efficient lamp is one that ...? a) Produces less light and saves energy b) Last longer c) Provides better color rendition d) Produces more light per unit of consumed energy - correct-answer- d) Produces more light per unit of consumed energy 3 - 2 In a fluorescent lamp, UV energy produced inside the lamp impacts the inside of the glass bulb and is converted into visible light. What substance on the bulb converts UV energy into visible light?
a) Fluorescence b) Halogen gas c) Phosphor d) Mercury - correct-answer- c) Phosphor 3 - 3 Which of the following is not a fluorescent lamp type? a) Preheat b) Metal halide c) Rapid start d) Instant start - correct-answer- b) Metal halide 3 - 4 What do rapid start lamps need to operate? a) A ballast b) A starter c) An ignitor d) A key - correct-answer- a) A ballast 3 - 5
An instant start F96T12 lamp is how many inches long? a) 9 b) 12 c) 96 d) 48 - correct-answer- c) 96 3 - 9 In a lamp code, "T" means the lamp is ...? a) Circular b) Tall c) Tubular d) Tested by Underwriters Laboratories, Inc. (UL) - correct-answer- c) Tubular 3 - 10 Which of the following is NOT a fluorescent lamp base? a) Bi-pin b) Recessed double-contact c) Single-pin d) 8 - pin - correct-answer- d) 8 - pin
Which of the following is NOT a fluorescent lamp shape? a) Circular b) Star-shaped c) Linear d) U-shaped - correct-answer- b) Star-shaped 3 - 12 If somebody says, "That's a T5HO lamp," what would we know about its light output? a) Produces more light than a T b) Produces less light than a T c) Light output degrades rapidly compared to T d) It produces the same amount of light as a T8 lamp - correct-answer- a) Produces more light than a T 3 - 13 Some compact fluorescent lamps have bi-pin or 4 - pin bases, and others have screw-in bases. Which of the following do we know to be true about CFLs with screw-in bases?
Which of the following is not a fluorescent ballast type? a) Preheat b) Rapid start c) Instant start d) High pressure sodium - correct-answer- d) High pressure sodium 3 - 17 Trigger start ballasts, which operate like rapid start ballasts, were designed to operate ...? a) Rapid start lamps b) Instant start lamps c) Preheat lamps d) Slimline lamps - correct-answer- c) Preheat lamps 3 - 18 A Class P ballasts is one which contains ...? a) A beeper to call you when there's a problem b) A thermal protection device that shuts down the ballast if it overheats c) A device that allows the ballast to start lamps at cold
temperatures d) None of the above - correct-answer- b) A thermal protection device that shuts down the ballast if it overheats. 3 - 19 Electronic ballasts offer which benefit? a) Less flicker b) Greater efficiency c) Quieter operation d) All of the Above - correct-answer- d) All of the above 3 - 20 If a lamp produces 3000 lumens and the ballast has a ballast factor of 0.90, what is the lamp's light output when operated by the ballast? a) 3000 b) 2700 c) 2500 d) 3236 - correct-answer- b) 2700 4 - 11
A BT56 lamp is _____________ in diameter. a) 56 inches b) 5.6 inches c) 8 inches d) 7 inches - correct-answer- d) 7 inches 5 - 1 The acronym LED stands for: a) Linear, Energy, Directional b) Lighting Efficiency Demands c) Light Emitting Diode d) Luminaire Efficacy Diagnostics - correct-answer- c) Light Emitting Diode 5 - 2 What factors contribute to a LED lighting system's efficiency? Select all that apply: a) LED lighting systems contain no lead b) LED lighting is inherently directional resulting in less
wasted light c) Conventional lighting systems cost less to install d) LED lighting systems are solid state electronic systems with highly efficient components - correct-answer- b) LED lighting is inherently directional resulting in less wasted light. 5 - 3 As LED is dimmed, it is the only light source that: a) Increases in efficacy b) Changes color c) Becomes brighter d) Generates more heat - correct-answer- a) Increases in efficacy 5 - 4 Select the two basic types of LEDs: a) Indicator-type b) Electronic-type c) Illuminator-type d) Radiant heat-type - correct-answer- a) Indicator-type and c) Illuminator-type
