IMSA TRAFFIC SIGNAL SENIOR FIELD TECHNICIAN I
CERTIFICATION EXAM QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) Q&A 2026
|INSTANT DOWNLOAD PDF
1. What is the primary purpose of a traffic signal system?
A. Increase fuel consumption
B. Control and assign right-of-way at intersections
C. Reduce road construction costs
D. Eliminate pedestrian crossings
Rationale: Signals regulate traffic flow and safety.
Correct answer: B
2. Which unit is used to measure electrical resistance?
A. Volt
B. Ampere
C. Ohm
D. Watt
Rationale: Resistance is measured in ohms.
Correct answer: C
3. A red traffic signal indicates:
A. Proceed with caution
B. Stop
C. Speed up
,D. Yield only to pedestrians
Rationale: Red universally means stop.
Correct answer: B
4. Ohm’s Law is expressed as:
A. P = IV
B. V = IR
C. I = VR
D. R = VI
Rationale: Voltage equals current times resistance.
Correct answer: B
5. Which component stores electrical energy in a signal
cabinet?
A. Resistor
B. Capacitor
C. Relay
D. Transformer
Rationale: Capacitors store energy temporarily.
Correct answer: B
6. A flashing yellow signal means:
A. Stop immediately
B. Proceed with caution
C. Speed up
,D. Traffic light is broken
Rationale: Warns drivers to proceed carefully.
Correct answer: B
7. The main function of a traffic controller is to:
A. Paint intersections
B. Control signal timing and phases
C. Generate electricity
D. Replace detectors
Rationale: Controllers manage signal operations.
Correct answer: B
8. Which device detects vehicle presence?
A. Relay
B. Detector loop
C. Fuse
D. Transformer
Rationale: Inductive loops detect vehicles.
Correct answer: B
9. Voltage is measured in:
A. Ohms
B. Amperes
C. Volts
D. Watts
, Rationale: Voltage is electrical potential difference.
Correct answer: C
10. A green signal means:
A. Stop
B. Proceed if safe
C. Yield only
D. Speed limit increase
Rationale: Green allows movement.
Correct answer: B
11. The purpose of a fuse is to:
A. Increase voltage
B. Protect circuits from overcurrent
C. Store energy
D. Amplify signals
Rationale: Fuses prevent electrical damage.
Correct answer: B
12. What is the function of a relay?
A. Store data
B. Switch electrical circuits
C. Generate heat
D. Measure voltage
CERTIFICATION EXAM QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) Q&A 2026
|INSTANT DOWNLOAD PDF
1. What is the primary purpose of a traffic signal system?
A. Increase fuel consumption
B. Control and assign right-of-way at intersections
C. Reduce road construction costs
D. Eliminate pedestrian crossings
Rationale: Signals regulate traffic flow and safety.
Correct answer: B
2. Which unit is used to measure electrical resistance?
A. Volt
B. Ampere
C. Ohm
D. Watt
Rationale: Resistance is measured in ohms.
Correct answer: C
3. A red traffic signal indicates:
A. Proceed with caution
B. Stop
C. Speed up
,D. Yield only to pedestrians
Rationale: Red universally means stop.
Correct answer: B
4. Ohm’s Law is expressed as:
A. P = IV
B. V = IR
C. I = VR
D. R = VI
Rationale: Voltage equals current times resistance.
Correct answer: B
5. Which component stores electrical energy in a signal
cabinet?
A. Resistor
B. Capacitor
C. Relay
D. Transformer
Rationale: Capacitors store energy temporarily.
Correct answer: B
6. A flashing yellow signal means:
A. Stop immediately
B. Proceed with caution
C. Speed up
,D. Traffic light is broken
Rationale: Warns drivers to proceed carefully.
Correct answer: B
7. The main function of a traffic controller is to:
A. Paint intersections
B. Control signal timing and phases
C. Generate electricity
D. Replace detectors
Rationale: Controllers manage signal operations.
Correct answer: B
8. Which device detects vehicle presence?
A. Relay
B. Detector loop
C. Fuse
D. Transformer
Rationale: Inductive loops detect vehicles.
Correct answer: B
9. Voltage is measured in:
A. Ohms
B. Amperes
C. Volts
D. Watts
, Rationale: Voltage is electrical potential difference.
Correct answer: C
10. A green signal means:
A. Stop
B. Proceed if safe
C. Yield only
D. Speed limit increase
Rationale: Green allows movement.
Correct answer: B
11. The purpose of a fuse is to:
A. Increase voltage
B. Protect circuits from overcurrent
C. Store energy
D. Amplify signals
Rationale: Fuses prevent electrical damage.
Correct answer: B
12. What is the function of a relay?
A. Store data
B. Switch electrical circuits
C. Generate heat
D. Measure voltage
