CPI Certification 2026/2027 Exam Actual
Questions with Verified Answers Detailed
Rationales Grade A
1. What is the purpose of the Citizens Broadband Radio Service (CBRS)?
A. To allocate 150 MHz of spectrum exclusively for military use
B. To allow a range of RF bandwidth previously allocated to one licensed user to be
shared among many users while maintaining that low-priority users do not interfere
with high-priority users
C. To replace all existing wireless communication systems
D. To provide free internet access to all citizens
Correct Answer: B. To allow a range of RF bandwidth previously allocated to one
licensed user to be shared among many users while maintaining that low-priority users
do not interfere with high-priority users
Rationale: CBRS enables spectrum sharing across multiple users while ensuring that
higher-priority users are protected from interference from lower-priority users.
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2. What RF band does CBRS control?
A. 600 MHz - 700 MHz
B. 2.4 GHz - 2.5 GHz
C. 3550 MHz - 3700 MHz
D. 5.8 GHz - 5.9 GHz
Correct Answer: C. 3550 MHz - 3700 MHz
Rationale: CBRS operates in the 3550 MHz to 3700 MHz frequency range, providing 150
MHz of new wireless bandwidth.
3. When was CBRS created and by which organization?
A. Created by the FCC in 2010
B. Created by the FCC in 2015
C. Created by WinnForum in 2015
D. Created by the CBRS Alliance in 2020
Correct Answer: B. Created by the FCC in 2015
Rationale: The Federal Communications Commission (FCC) created CBRS in 2015 to
enable shared spectrum access.
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4. What is the primary function of the Spectrum Access System (SAS)?
A. To sell spectrum licenses to the highest bidder
B. To monitor all CBRS clients and receive information from CPIs to ensure low-priority
users do not interfere with high-priority users
C. To install CBRS equipment
D. To certify installers of CBRS equipment
Correct Answer: B. To monitor all CBRS clients and receive information from CPIs to
ensure low-priority users do not interfere with high-priority users
Rationale: The SAS monitors CBRS clients and uses information from Certified
Professional Installers (CPIs) to prevent interference with higher-priority users.
5. Which of the following are advantages of a shared spectrum? Select all that apply.
A. Efficiency: lower priority users can use spectrum that was previously allocated to a
single user 100% of the time
B. Time to Market: it is quick and easy for new companies to start using CBRS spectrum
C. Cost: it is completely free for a new business to begin using bandwidth
D. Security: shared spectrum provides better encryption than licensed spectrum
Correct Answer: A, B, C