NICET In-Building Public Safety
Communications (IB-PSC) – Technician
Track Level I Practice Exam Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download
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1. Which of the following is the primary purpose of an in-building
public safety communication system?
A. Enhance mobile phone coverage
B. Provide wireless internet access
C. Ensure reliable radio communication for emergency
responders
D. Reduce interference from other radio systems
Rationale: The main purpose of IB-PSC systems is to maintain
reliable communication for fire, police, and emergency medical
services inside buildings.
2. What type of signal does a bi-directional amplifier (BDA) primarily
boost?
A. Audio
B. Radio frequency (RF)
C. Ethernet
D. Video
Rationale: BDAs amplify RF signals to extend radio coverage
within a building.
,3. Which standard governs public safety radio coverage in buildings
in the United States?
A. ISO 9001
B. IEEE 802.11
C. NFPA 72
D. NEC Article 800
Rationale: NFPA 72, National Fire Alarm and Signaling Code,
includes requirements for public safety radio coverage.
4. What is the minimum required signal strength for reliable in-
building public safety radio communication?
A. -100 dBm
B. -90 dBm
C. -95 dBm
D. -85 dBm
Rationale: NFPA 72 requires a minimum signal strength of -95
dBm in all areas where coverage is needed.
5. What does a donor antenna in a BDA system do?
A. Receives signal from mobile users inside the building
B. Receives signal from the outdoor public safety radio system
C. Distributes signal to all interior antennas
D. Converts RF signal to digital signal
Rationale: The donor antenna captures signals from the public
safety radio system outside the building.
6. Which component distributes the amplified signal inside a
building?
A. Donor antenna
B. Inside antennas (or radiating cables)
C. Power supply
D. Duplexer
, Rationale: Inside antennas or radiating cables deliver the
amplified RF signal to the building interior.
7. What is the function of a coaxial cable in an IB-PSC system?
A. Convert RF signals to audio
B. Split power to multiple devices
C. Carry RF signals between antennas and BDA
D. Provide grounding
Rationale: Coaxial cables are used to carry RF signals with minimal
loss.
8. What is the main role of a signal booster?
A. Generate new signals
B. Encrypt communications
C. Increase the strength of weak radio signals
D. Change radio frequencies
Rationale: Signal boosters amplify weak RF signals to improve
coverage.
9. Which test is used to verify in-building radio coverage?
A. Ohmmeter test
B. Voltage drop test
C. Signal strength survey or propagation test
D. Continuity test
Rationale: Signal surveys measure coverage and ensure adequate
signal levels in all required areas.
10. What does a distributed antenna system (DAS) do?
A. Converts analog signals to digital
B. Stores backup power
C. Distributes RF signals throughout a building
D. Monitors environmental conditions
Communications (IB-PSC) – Technician
Track Level I Practice Exam Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download
1. Which of the following is the primary purpose of an in-building
public safety communication system?
A. Enhance mobile phone coverage
B. Provide wireless internet access
C. Ensure reliable radio communication for emergency
responders
D. Reduce interference from other radio systems
Rationale: The main purpose of IB-PSC systems is to maintain
reliable communication for fire, police, and emergency medical
services inside buildings.
2. What type of signal does a bi-directional amplifier (BDA) primarily
boost?
A. Audio
B. Radio frequency (RF)
C. Ethernet
D. Video
Rationale: BDAs amplify RF signals to extend radio coverage
within a building.
,3. Which standard governs public safety radio coverage in buildings
in the United States?
A. ISO 9001
B. IEEE 802.11
C. NFPA 72
D. NEC Article 800
Rationale: NFPA 72, National Fire Alarm and Signaling Code,
includes requirements for public safety radio coverage.
4. What is the minimum required signal strength for reliable in-
building public safety radio communication?
A. -100 dBm
B. -90 dBm
C. -95 dBm
D. -85 dBm
Rationale: NFPA 72 requires a minimum signal strength of -95
dBm in all areas where coverage is needed.
5. What does a donor antenna in a BDA system do?
A. Receives signal from mobile users inside the building
B. Receives signal from the outdoor public safety radio system
C. Distributes signal to all interior antennas
D. Converts RF signal to digital signal
Rationale: The donor antenna captures signals from the public
safety radio system outside the building.
6. Which component distributes the amplified signal inside a
building?
A. Donor antenna
B. Inside antennas (or radiating cables)
C. Power supply
D. Duplexer
, Rationale: Inside antennas or radiating cables deliver the
amplified RF signal to the building interior.
7. What is the function of a coaxial cable in an IB-PSC system?
A. Convert RF signals to audio
B. Split power to multiple devices
C. Carry RF signals between antennas and BDA
D. Provide grounding
Rationale: Coaxial cables are used to carry RF signals with minimal
loss.
8. What is the main role of a signal booster?
A. Generate new signals
B. Encrypt communications
C. Increase the strength of weak radio signals
D. Change radio frequencies
Rationale: Signal boosters amplify weak RF signals to improve
coverage.
9. Which test is used to verify in-building radio coverage?
A. Ohmmeter test
B. Voltage drop test
C. Signal strength survey or propagation test
D. Continuity test
Rationale: Signal surveys measure coverage and ensure adequate
signal levels in all required areas.
10. What does a distributed antenna system (DAS) do?
A. Converts analog signals to digital
B. Stores backup power
C. Distributes RF signals throughout a building
D. Monitors environmental conditions
