NALMCO Certified Apprentice Lighting
Technician (CALT) Study Guide
questions and answers 2023
1-1
Light output is measured in ...?
a) Footcandles
b) Lumens
c) Watts
d) Electrons - answerb) 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 - answerb) 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 - answera) 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 - answerc) 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 - answerd) 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 - answerb) Electroluminescent
1-7
The amount of electric power a lighting system draws is measured in ...?
a) Watts
b) Ohms
c) Amps
d) Volts - answera) Watts
1-8
A lighting system's efficacy is measured in ...?
a) Lumens/Watt
b) Amps/Volt
c) Lumens/kWh
d) $/kWh - answera) 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? - answerd) 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 - answerc) 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 - answera) 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 - answerc) 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 - answerb) 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 - answerb) Push light in a direction
2-2
In incandescent lamp typically converts _____% of its electrical input into light output.
a) 10-15%
b) 20-25%
c) 30-35%
d) 50% - answera) 10-15%
2-3
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 - answerc) 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 - answerc) Shock and vibration
Technician (CALT) Study Guide
questions and answers 2023
1-1
Light output is measured in ...?
a) Footcandles
b) Lumens
c) Watts
d) Electrons - answerb) 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 - answerb) 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 - answera) 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 - answerc) 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 - answerd) 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 - answerb) Electroluminescent
1-7
The amount of electric power a lighting system draws is measured in ...?
a) Watts
b) Ohms
c) Amps
d) Volts - answera) Watts
1-8
A lighting system's efficacy is measured in ...?
a) Lumens/Watt
b) Amps/Volt
c) Lumens/kWh
d) $/kWh - answera) 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? - answerd) 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 - answerc) 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 - answera) 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 - answerc) 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 - answerb) 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 - answerb) Push light in a direction
2-2
In incandescent lamp typically converts _____% of its electrical input into light output.
a) 10-15%
b) 20-25%
c) 30-35%
d) 50% - answera) 10-15%
2-3
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 - answerc) 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 - answerc) Shock and vibration
