CO Security Systems Contractor Exam
Practice Questions And Correct
Answers (Verified Answers) Plus
Rationale 2027 Q&A| Instant
Download Pdf.
1. Which component of a security system is primarily responsible for
receiving signals from door and window contacts, motion detectors,
glass-break sensors, and other initiating devices and determining
whether an alarm condition exists?
A. Notification appliance
B. Control panel
C. Power-limited circuit
D. Door closer
B. Control panel
The control panel is the central processing unit of an intrusion security
system. It supervises initiating devices, processes alarm and trouble
conditions, controls outputs, and communicates with monitoring
equipment when applicable.
2. In a typical intrusion detection system, what is the primary purpose
of an end-of-line (EOL) resistor?
,A. Increase the voltage supplied to a detector
B. Provide circuit supervision and help detect wiring faults
C. Reduce the sound level of a siren
D. Convert AC power to DC power
B. Provide circuit supervision and help detect wiring faults
An EOL resistor allows the control panel to supervise the integrity of a
monitored circuit. Depending on the system design, an open or short
circuit can be distinguished from the normal condition, helping identify
tampering or wiring failures.
3. Which device is most commonly used to detect unauthorized
opening of a protected door or window?
A. Magnetic reed contact
B. Passive infrared detector
C. Smoke detector
D. Ultrasonic transducer
A. Magnetic reed contact
A magnetic reed contact uses a magnet and a switch to monitor
whether a door or window is open or closed. It is one of the most
common perimeter-protection devices in intrusion alarm systems.
4. A passive infrared (PIR) motion detector primarily detects which
phenomenon?
A. Changes in ambient sound pressure
B. Changes in infrared radiation caused by movement of heat-producing
,objects
C. Changes in magnetic field strength caused by doors opening
D. Changes in atmospheric pressure
B. Changes in infrared radiation caused by movement of heat-producing
objects
A PIR detector senses changes in infrared energy within its field of view.
Movement of a person across different zones of the detector's sensing
pattern produces a change that can initiate an alarm signal.
5. When installing a PIR motion detector, which condition should
generally be avoided because it can cause false alarms?
A. Mounting it where its detection pattern crosses a protected area
B. Positioning it toward a stable interior wall
C. Directing it toward strong sources of heat or rapidly changing
temperature
D. Providing the manufacturer's required operating voltage
C. Directing it toward strong sources of heat or rapidly changing
temperature
Strong or rapidly changing heat sources can affect PIR detectors because
they sense infrared energy. Proper placement away from HVAC outlets,
direct sunlight, heaters, and other unstable thermal sources helps
reduce nuisance alarms.
6. What is the principal function of a security system's standby
battery?
, A. Increase the resistance of signaling circuits
B. Provide backup power when the normal primary power source is
unavailable
C. Amplify signals from motion detectors
D. Replace all circuit supervision components
B. Provide backup power when the normal primary power source is
unavailable
A standby battery maintains operation of the security system during a
loss of normal power. Its capacity must be adequate for the required
standby and alarm operating periods established by the applicable
system design and governing requirements.
7. Which wiring practice is most appropriate when installing
conductors for a security system?
A. Leave conductors unsupported wherever possible
B. Protect wiring from physical damage and install it according to
applicable electrical and manufacturer requirements
C. Run all low-voltage wiring inside high-voltage raceways without
separation
D. Use any conductor size regardless of voltage drop
B. Protect wiring from physical damage and install it according to
applicable electrical and manufacturer requirements
Security-system wiring must be installed in a manner that preserves
circuit integrity and protects conductors from damage. Applicable
Practice Questions And Correct
Answers (Verified Answers) Plus
Rationale 2027 Q&A| Instant
Download Pdf.
1. Which component of a security system is primarily responsible for
receiving signals from door and window contacts, motion detectors,
glass-break sensors, and other initiating devices and determining
whether an alarm condition exists?
A. Notification appliance
B. Control panel
C. Power-limited circuit
D. Door closer
B. Control panel
The control panel is the central processing unit of an intrusion security
system. It supervises initiating devices, processes alarm and trouble
conditions, controls outputs, and communicates with monitoring
equipment when applicable.
2. In a typical intrusion detection system, what is the primary purpose
of an end-of-line (EOL) resistor?
,A. Increase the voltage supplied to a detector
B. Provide circuit supervision and help detect wiring faults
C. Reduce the sound level of a siren
D. Convert AC power to DC power
B. Provide circuit supervision and help detect wiring faults
An EOL resistor allows the control panel to supervise the integrity of a
monitored circuit. Depending on the system design, an open or short
circuit can be distinguished from the normal condition, helping identify
tampering or wiring failures.
3. Which device is most commonly used to detect unauthorized
opening of a protected door or window?
A. Magnetic reed contact
B. Passive infrared detector
C. Smoke detector
D. Ultrasonic transducer
A. Magnetic reed contact
A magnetic reed contact uses a magnet and a switch to monitor
whether a door or window is open or closed. It is one of the most
common perimeter-protection devices in intrusion alarm systems.
4. A passive infrared (PIR) motion detector primarily detects which
phenomenon?
A. Changes in ambient sound pressure
B. Changes in infrared radiation caused by movement of heat-producing
,objects
C. Changes in magnetic field strength caused by doors opening
D. Changes in atmospheric pressure
B. Changes in infrared radiation caused by movement of heat-producing
objects
A PIR detector senses changes in infrared energy within its field of view.
Movement of a person across different zones of the detector's sensing
pattern produces a change that can initiate an alarm signal.
5. When installing a PIR motion detector, which condition should
generally be avoided because it can cause false alarms?
A. Mounting it where its detection pattern crosses a protected area
B. Positioning it toward a stable interior wall
C. Directing it toward strong sources of heat or rapidly changing
temperature
D. Providing the manufacturer's required operating voltage
C. Directing it toward strong sources of heat or rapidly changing
temperature
Strong or rapidly changing heat sources can affect PIR detectors because
they sense infrared energy. Proper placement away from HVAC outlets,
direct sunlight, heaters, and other unstable thermal sources helps
reduce nuisance alarms.
6. What is the principal function of a security system's standby
battery?
, A. Increase the resistance of signaling circuits
B. Provide backup power when the normal primary power source is
unavailable
C. Amplify signals from motion detectors
D. Replace all circuit supervision components
B. Provide backup power when the normal primary power source is
unavailable
A standby battery maintains operation of the security system during a
loss of normal power. Its capacity must be adequate for the required
standby and alarm operating periods established by the applicable
system design and governing requirements.
7. Which wiring practice is most appropriate when installing
conductors for a security system?
A. Leave conductors unsupported wherever possible
B. Protect wiring from physical damage and install it according to
applicable electrical and manufacturer requirements
C. Run all low-voltage wiring inside high-voltage raceways without
separation
D. Use any conductor size regardless of voltage drop
B. Protect wiring from physical damage and install it according to
applicable electrical and manufacturer requirements
Security-system wiring must be installed in a manner that preserves
circuit integrity and protects conductors from damage. Applicable
