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IMSA Roadway Lighting I Practice Questions - IMSA Roadway Lighting Technician Level I Certification Exam Exam
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Question
1
of 25
QUESTION 1 / 25
What is the unit of measurement for illuminance on a roadway surface?
Choose one answer below.
A
Candelas
✓
B
Lumens
✓
C
Footcandles (or lux)
✓
D
Watts
✓
QUESTION 2 / 25
What does 'luminance' measure in roadway lighting?
Choose one answer below.
A
The total power consumed by the luminaire
✓
B
The brightness of the roadway surface as perceived by a driver, measured in candelas per square meter
✓
C
The height of the luminaire pole
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D
The diameter of the lamp
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QUESTION 3 / 25
What does 'uniformity ratio' indicate in a roadway lighting design?
Choose one answer below.
A
The number of luminaires used
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B
The ratio of average to minimum illuminance, indicating how evenly light is distributed across the roadway
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C
The color of the light
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D
The wattage of each luminaire
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QUESTION 4 / 25
Which lamp type has largely replaced high-pressure sodium (HPS) for new roadway lighting installations?
Choose one answer below.
A
Incandescent
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B
Mercury vapor
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C
LED (Light Emitting Diode)
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D
Fluorescent
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QUESTION 5 / 25
What is a key characteristic of high-pressure sodium (HPS) lamp light output?
Choose one answer below.
A
Blue-white light with excellent color rendering
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B
Yellow-orange light with moderate color rendering
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C
Full-spectrum white light
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D
Red light output
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QUESTION 6 / 25
What is the typical rated life expectancy of an LED roadway luminaire?
Choose one answer below.
A
2,000 hours
✓
B
10,000 hours
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C
50,000 to 100,000+ hours
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D
500 hours
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QUESTION 7 / 25
What is the function of a photocontrol (photocell) on a roadway lighting system?
Choose one answer below.
A
To adjust the color temperature of the light
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B
To automatically turn lights on at dusk and off at dawn based on ambient light levels
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C
To regulate the voltage to the luminaire
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D
To protect the luminaire from surge damage
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QUESTION 8 / 25
What is the NEMA twist-lock receptacle standard for mounting photocontrols on roadway luminaires?
Choose one answer below.
A
Edison screw base
✓
B
ANSI C136.10 (NEMA twist-lock)
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C
Bayonet base
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D
Mogul base
✓
QUESTION 9 / 25
In a parallel circuit, what happens to the remaining luminaires if one luminaire fails (open circuit)?
Choose one answer below.
A
All luminaires on the circuit go dark
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B
The remaining luminaires continue to operate normally
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C
The remaining luminaires get brighter
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D
The circuit breaker trips immediately
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QUESTION 10 / 25
In a series lighting circuit, what happens if one lamp fails (open circuit) WITHOUT an isolation device?
Choose one answer below.
A
Only the failed lamp goes dark
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B
All lamps on the circuit go dark because the circuit is broken
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C
The circuit voltage doubles
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D
Nothing happens
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QUESTION 11 / 25
What is the primary advantage of parallel circuits over series circuits for roadway lighting?
Choose one answer below.
A
Lower installation cost
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B
Individual luminaire failure does not affect other luminaires on the circuit
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C
Higher voltage operation
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D
Less wiring required
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QUESTION 12 / 25
What is Ohm's Law?
Choose one answer below.
A
Power equals voltage times current (P = V × I)
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B
Voltage equals current times resistance (V = I × R)
✓
C
Energy equals mass times the speed of light squared
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D
Force equals mass times acceleration
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QUESTION 13 / 25
What is the standard residential and commercial single-phase voltage in the United States?
Choose one answer below.
A
100 VAC
✓
B
120/240 VAC
✓
C
277/480 VAC
✓
D
600 VAC
✓
QUESTION 14 / 25
What organization publishes the RP-8 standard for roadway lighting design?
Choose one answer below.
A
OSHA
✓
B
IES (Illuminating Engineering Society)
✓
C
NFPA
✓
D
ASTM
✓
QUESTION 15 / 25
According to IESNA RP-8, which roadway classification requires the highest average maintained illuminance levels?
Choose one answer below.
A
Local residential streets
✓
B
Major (arterial) roadways
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C
Parking lots
✓
D
Alleys
✓
QUESTION 16 / 25
What is the typical material used for roadway lighting poles?
Choose one answer below.
A
Plastic
✓
B
Steel, aluminum, or fiberglass
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C
Concrete only
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D
Copper
✓
QUESTION 17 / 25
What is the purpose of a breakaway base on a roadway lighting pole?
Choose one answer below.
A
To make the pole easier to install
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B
To allow the pole to break away upon vehicle impact, reducing injury severity
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C
To allow the pole to be easily removed for maintenance
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D
To adjust the pole height
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QUESTION 18 / 25
What is the NEC article that covers the installation of lighting systems, including outdoor luminaires?
Choose one answer below.
A
Article 210 - Branch Circuits
✓
B
Article 410 - Luminaires, Lampholders, and Lamps
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C
Article 500 - Hazardous Locations
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D
Article 680 - Swimming Pools
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QUESTION 19 / 25
What minimum burial depth does the NEC require for direct-buried cable (without conduit) in a roadway lighting installation?
Choose one answer below.
A
6 inches
✓
B
12 inches
✓
C
24 inches
✓
D
36 inches
✓
QUESTION 20 / 25
What is the purpose of an equipment grounding conductor in a roadway lighting circuit?
Choose one answer below.
A
To carry normal operating current
✓
B
To provide a low-impedance path for fault current to trip the overcurrent device and protect people from shock
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C
To increase the brightness of the luminaire
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D
To operate the photocontrol
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QUESTION 21 / 25
What is the minimum size equipment grounding conductor required for a 20-amp roadway lighting branch circuit per the NEC?
Choose one answer below.
A
#14 AWG copper
✓
B
#12 AWG copper
✓
C
#10 AWG copper
✓
D
#8 AWG copper
✓
QUESTION 22 / 25
What does 'lockout/tagout' (LOTO) mean in the context of roadway lighting maintenance?
Choose one answer below.
A
Locking the vehicle doors during maintenance
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B
De-energizing the circuit and applying a physical lock and tag to the disconnect to prevent accidental re-energization
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C
Tagging equipment for future replacement
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D
Locking the luminaire lens
✓
QUESTION 23 / 25
What is the FIRST step in the lockout/tagout procedure for a roadway lighting circuit?
Choose one answer below.
A
Apply the lock to the disconnect
✓
B
Notify all affected employees that the system will be shut down
✓
C
Begin work immediately
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D
Test the circuit for voltage
✓
QUESTION 24 / 25
What personal protective equipment (PPE) should be worn when working on energized roadway lighting circuits?
Choose one answer below.
A
Only safety glasses
✓
B
Insulated gloves rated for the voltage, safety glasses with side shields, and arc-rated clothing
✓
C
Standard leather work gloves only
✓
D
No PPE is needed if the work is done quickly
✓
QUESTION 25 / 25
What is the purpose of a ground fault circuit interrupter (GFCI) in roadway lighting applications?
Choose one answer below.
A
To protect luminaires from power surges
✓
B
To detect ground faults as small as 5 milliamps and disconnect the circuit to prevent electrocution
✓
C
To increase the brightness of the lights
✓
D
To control the on/off schedule of the lighting
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