NICET In-Building Public Safety
Communications (IB-PSC) – Technician
Track, Level III Practice Exam Questions
And Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A | Instant
Download PDF
1. Which standard is primarily used to design in-building public
safety communication systems?
A. NFPA 72
B. NFPA 101
C. NFPA 70
D. NFPA 25
A
NFPA 72 provides the requirements for the installation,
performance, and testing of in-building public safety
communication systems.
2. What is the typical frequency range for public safety radio
communications in the U.S.?
A. 30–300 MHz
B. 150–174 MHz and 450–470 MHz
C. 700–900 MHz only
D. 2.4–5 GHz
B
These VHF and UHF bands are commonly allocated for public
safety radio communications.
,3. The main purpose of a Bi-Directional Amplifier (BDA) in a building
is:
A. To extend commercial cellular coverage
B. To amplify public safety radio signals inside buildings
C. To reduce electrical interference
D. To provide Wi-Fi access
B
A BDA amplifies signals from the public safety radio system to
ensure coverage throughout the building.
4. Which component connects the in-building system to the outside
antenna?
A. Signal booster
B. Headend
C. Main distribution frame
D. Coaxial splitter
B
The headend is the central point where the external antenna
connects and signals are distributed within the building.
5. A DAS system distributes signals using:
A. Optical fiber only
B. Coaxial cable only
C. Either coaxial cable or optical fiber
D. Wireless repeaters only
C
Distributed Antenna Systems (DAS) can use coaxial or fiber to
distribute signals depending on design.
6. Which is a primary concern when installing in-building public
safety communication systems?
A. Aesthetic appearance
, B. Battery life of mobile devices
C. Reliable coverage in all areas of the building
D. Internet speed
C
Reliable coverage is critical for first responders to communicate
during emergencies.
7. What is the minimum signal strength recommended by NFPA 72
for in-building public safety coverage?
A. -95 dBm
B. -80 dBm
C. -100 dBm
D. -70 dBm
B
NFPA 72 specifies -80 dBm as the minimum usable signal for
reliable radio communication.
8. The purpose of a coaxial coupler in a DAS is to:
A. Reduce noise
B. Split or combine RF signals
C. Convert signals from digital to analog
D. Protect against lightning
B
Couplers allow signals to be split or combined across multiple
antennas or feeders.
9. When testing a public safety radio system, a "dead spot" refers to:
A. A location with poor or no signal
B. A malfunctioning repeater
C. Excessive interference
D. A low battery device
, A
Dead spots are areas where radio coverage is inadequate.
10. Which type of antenna is typically used on a roof for
receiving external public safety signals?
A. Omnidirectional
B. Yagi
C. Panel
D. All of the above
D
Roof antennas can be omnidirectional, directional (Yagi), or panel
depending on signal requirements.
11. What is the primary function of a donor antenna?
A. To provide coverage inside the building
B. To capture outside public safety signals for amplification
C. To provide Wi-Fi service
D. To reduce interference
B
Donor antennas receive signals from the public safety network to
feed the BDA.
12. When installing coaxial cables in a building, the
recommended minimum bend radius is typically:
A. 2 times the cable diameter
B. 5 times the cable diameter
C. 10 times the cable diameter
D. No limit
C
Maintaining at least 10 times the cable diameter helps prevent
signal loss or cable damage.
Communications (IB-PSC) – Technician
Track, Level III Practice Exam Questions
And Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A | Instant
Download PDF
1. Which standard is primarily used to design in-building public
safety communication systems?
A. NFPA 72
B. NFPA 101
C. NFPA 70
D. NFPA 25
A
NFPA 72 provides the requirements for the installation,
performance, and testing of in-building public safety
communication systems.
2. What is the typical frequency range for public safety radio
communications in the U.S.?
A. 30–300 MHz
B. 150–174 MHz and 450–470 MHz
C. 700–900 MHz only
D. 2.4–5 GHz
B
These VHF and UHF bands are commonly allocated for public
safety radio communications.
,3. The main purpose of a Bi-Directional Amplifier (BDA) in a building
is:
A. To extend commercial cellular coverage
B. To amplify public safety radio signals inside buildings
C. To reduce electrical interference
D. To provide Wi-Fi access
B
A BDA amplifies signals from the public safety radio system to
ensure coverage throughout the building.
4. Which component connects the in-building system to the outside
antenna?
A. Signal booster
B. Headend
C. Main distribution frame
D. Coaxial splitter
B
The headend is the central point where the external antenna
connects and signals are distributed within the building.
5. A DAS system distributes signals using:
A. Optical fiber only
B. Coaxial cable only
C. Either coaxial cable or optical fiber
D. Wireless repeaters only
C
Distributed Antenna Systems (DAS) can use coaxial or fiber to
distribute signals depending on design.
6. Which is a primary concern when installing in-building public
safety communication systems?
A. Aesthetic appearance
, B. Battery life of mobile devices
C. Reliable coverage in all areas of the building
D. Internet speed
C
Reliable coverage is critical for first responders to communicate
during emergencies.
7. What is the minimum signal strength recommended by NFPA 72
for in-building public safety coverage?
A. -95 dBm
B. -80 dBm
C. -100 dBm
D. -70 dBm
B
NFPA 72 specifies -80 dBm as the minimum usable signal for
reliable radio communication.
8. The purpose of a coaxial coupler in a DAS is to:
A. Reduce noise
B. Split or combine RF signals
C. Convert signals from digital to analog
D. Protect against lightning
B
Couplers allow signals to be split or combined across multiple
antennas or feeders.
9. When testing a public safety radio system, a "dead spot" refers to:
A. A location with poor or no signal
B. A malfunctioning repeater
C. Excessive interference
D. A low battery device
, A
Dead spots are areas where radio coverage is inadequate.
10. Which type of antenna is typically used on a roof for
receiving external public safety signals?
A. Omnidirectional
B. Yagi
C. Panel
D. All of the above
D
Roof antennas can be omnidirectional, directional (Yagi), or panel
depending on signal requirements.
11. What is the primary function of a donor antenna?
A. To provide coverage inside the building
B. To capture outside public safety signals for amplification
C. To provide Wi-Fi service
D. To reduce interference
B
Donor antennas receive signals from the public safety network to
feed the BDA.
12. When installing coaxial cables in a building, the
recommended minimum bend radius is typically:
A. 2 times the cable diameter
B. 5 times the cable diameter
C. 10 times the cable diameter
D. No limit
C
Maintaining at least 10 times the cable diameter helps prevent
signal loss or cable damage.
