South Carolina Automatic Door
Technician Certification License Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. Which of the following best describes the primary purpose of an
automatic sliding door’s activation zone?
A. To provide structural support for the door panels
B. To detect approaching pedestrians and initiate door motion
C. To house the door’s electrical control panel
D. To block unauthorized access to the doorway
Bold rationale: An automatic sliding door’s activation zone is specifically
designed to sense approaching people and trigger the door’s opening
sequence, ensuring safe and efficient access.
2. What is the minimum safe clearance required at the bottom of an
automatic swinging door to prevent entrapment hazards?
A. ½ inch
B. ¾ inch
C. ⅜ inch
D. 1 inch
,Bold rationale: A clearance of ⅜ inch at the bottom of an automatic
swinging door is the industry standard to minimize entrapment while
allowing proper operation and compliance with safety codes.
3. Under UL 325, which of the following functions must be present on
all automatic door operators?
A. Remote radio control capability
B. Emergency alarm integration
C. Obstruction detection and reversing
D. Fire sprinkler activation
Bold rationale: UL 325 requires automatic door operators to incorporate
obstruction detection and reversing functions to prevent injury or damage if
something blocks the door’s path.
4. In an automatic door system, what type of sensor typically uses
infrared energy to detect motion?
A. Magnetic switch
B. Pressure mat
C. Passive infrared (PIR) detector
D. Ultrasonic transducer
Bold rationale: Passive infrared detectors rely on infrared energy changes
caused by movement and are commonly used in automatic door systems to
detect approaching pedestrians.
5. When performing a risk assessment on an automatic door
installation, which hazard should be prioritized?
A. Paint finish durability
B. Crush and shear points
C. Energy consumption
D. Aesthetic alignment
,Bold rationale: Crush and shear points pose significant injury risks, so they
must be identified and mitigated first in any automatic door risk assessment.
6. What is the purpose of a monitoring contact in an automatic door
operator?
A. To enhance door speed
B. To increase power output
C. To provide feedback on door position for safety systems
D. To control door lighting
Bold rationale: Monitoring contacts provide essential feedback about door
position and status to safety and control systems, improving reliability and
compliance.
7. Which component in an automatic door system limits the door’s
travel and prevents overrun?
A. Activation sensor
B. Drive roller
C. Mechanical stop
D. Power supply
Bold rationale: Mechanical stops physically limit door travel, ensuring it does
not move beyond its designed range and cause damage or hazards.
8. What is the correct sequence of steps before working on the
electrical components of an automatic door?
A. Open door, test sensors, disconnect wiring
B. De-energize power, lockout/tagout, verify zero energy
C. Remove cover, adjust motors, plug power back in
D. Test door operation, reset breakers, tighten bolts
Bold rationale: De-energizing power, applying lockout/tagout, and verifying
zero energy are essential steps to ensure technician safety before servicing
electrical components.
, 9. Which safety standard governs the installation and maintenance of
automatic pedestrian doors?
A. NFPA 70E
B. OSHA 1910 Subpart D
C. ANSI/BHMA A156.10 and A156.19
D. ASME B30
Bold rationale: ANSI/BHMA A156.10 (Power Operated Pedestrian Doors) and
A156.19 (Automatic Entrances) are the key standards for the safe installation
and maintenance of automatic pedestrian doors.
10. Why must an automatic door’s activation field be regularly
inspected and adjusted?
A. To reduce electrical consumption
B. To improve aesthetic appearance
C. To ensure reliable detection and prevent inadvertent activations
D. To increase motor speed
Bold rationale: Regular inspection and adjustment ensure that the activation
field correctly detects users without false triggers, maintaining safety and
functionality.
11. Which of the following is a common cause of automatic door
drive belt failure?
A. Excessive lubrication
B. Overvoltage supply
C. Misalignment of pulleys
D. Sensor interference
Bold rationale: Misalignment of pulleys causes uneven wear and strain on
the drive belt, leading to premature failure.
12. When calibrating an automatic sliding door’s closing force,
what is the primary concern?
Technician Certification License Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. Which of the following best describes the primary purpose of an
automatic sliding door’s activation zone?
A. To provide structural support for the door panels
B. To detect approaching pedestrians and initiate door motion
C. To house the door’s electrical control panel
D. To block unauthorized access to the doorway
Bold rationale: An automatic sliding door’s activation zone is specifically
designed to sense approaching people and trigger the door’s opening
sequence, ensuring safe and efficient access.
2. What is the minimum safe clearance required at the bottom of an
automatic swinging door to prevent entrapment hazards?
A. ½ inch
B. ¾ inch
C. ⅜ inch
D. 1 inch
,Bold rationale: A clearance of ⅜ inch at the bottom of an automatic
swinging door is the industry standard to minimize entrapment while
allowing proper operation and compliance with safety codes.
3. Under UL 325, which of the following functions must be present on
all automatic door operators?
A. Remote radio control capability
B. Emergency alarm integration
C. Obstruction detection and reversing
D. Fire sprinkler activation
Bold rationale: UL 325 requires automatic door operators to incorporate
obstruction detection and reversing functions to prevent injury or damage if
something blocks the door’s path.
4. In an automatic door system, what type of sensor typically uses
infrared energy to detect motion?
A. Magnetic switch
B. Pressure mat
C. Passive infrared (PIR) detector
D. Ultrasonic transducer
Bold rationale: Passive infrared detectors rely on infrared energy changes
caused by movement and are commonly used in automatic door systems to
detect approaching pedestrians.
5. When performing a risk assessment on an automatic door
installation, which hazard should be prioritized?
A. Paint finish durability
B. Crush and shear points
C. Energy consumption
D. Aesthetic alignment
,Bold rationale: Crush and shear points pose significant injury risks, so they
must be identified and mitigated first in any automatic door risk assessment.
6. What is the purpose of a monitoring contact in an automatic door
operator?
A. To enhance door speed
B. To increase power output
C. To provide feedback on door position for safety systems
D. To control door lighting
Bold rationale: Monitoring contacts provide essential feedback about door
position and status to safety and control systems, improving reliability and
compliance.
7. Which component in an automatic door system limits the door’s
travel and prevents overrun?
A. Activation sensor
B. Drive roller
C. Mechanical stop
D. Power supply
Bold rationale: Mechanical stops physically limit door travel, ensuring it does
not move beyond its designed range and cause damage or hazards.
8. What is the correct sequence of steps before working on the
electrical components of an automatic door?
A. Open door, test sensors, disconnect wiring
B. De-energize power, lockout/tagout, verify zero energy
C. Remove cover, adjust motors, plug power back in
D. Test door operation, reset breakers, tighten bolts
Bold rationale: De-energizing power, applying lockout/tagout, and verifying
zero energy are essential steps to ensure technician safety before servicing
electrical components.
, 9. Which safety standard governs the installation and maintenance of
automatic pedestrian doors?
A. NFPA 70E
B. OSHA 1910 Subpart D
C. ANSI/BHMA A156.10 and A156.19
D. ASME B30
Bold rationale: ANSI/BHMA A156.10 (Power Operated Pedestrian Doors) and
A156.19 (Automatic Entrances) are the key standards for the safe installation
and maintenance of automatic pedestrian doors.
10. Why must an automatic door’s activation field be regularly
inspected and adjusted?
A. To reduce electrical consumption
B. To improve aesthetic appearance
C. To ensure reliable detection and prevent inadvertent activations
D. To increase motor speed
Bold rationale: Regular inspection and adjustment ensure that the activation
field correctly detects users without false triggers, maintaining safety and
functionality.
11. Which of the following is a common cause of automatic door
drive belt failure?
A. Excessive lubrication
B. Overvoltage supply
C. Misalignment of pulleys
D. Sensor interference
Bold rationale: Misalignment of pulleys causes uneven wear and strain on
the drive belt, leading to premature failure.
12. When calibrating an automatic sliding door’s closing force,
what is the primary concern?
