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100+ Free MS Communication Systems Practice Questions

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2026 Statistics

Key Facts: MS Communication Systems Exam

70%

Passing Score

PSI MS Contractor Bulletin 4/23/2026

50 Q

Official Exam Questions

PSI MS Contractor Bulletin 4/23/2026

2 hours

Time Allowed

PSI MS Contractor Bulletin 4/23/2026

$120

PSI Exam Fee

PSI MS Contractor Bulletin 4/23/2026

Open book

Exam Format

PSI MS Contractor Bulletin 4/23/2026

MS Communication Systems PSI trade exam: 50 questions, 70% pass, 2 hours, fee $120. Open-book MSBOC classification (bulletin 4/23/2026).

Sample MS Communication Systems Practice Questions

Try these sample questions to test your MS Communication Systems exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Under the Mississippi State Board of Contractors Communication Systems classification, energy-limited communication and low-voltage systems must not exceed which voltage?
A.24 volts
B.50 volts
C.91 volts
D.150 volts
Explanation: MSBOC defines Communication Systems, Low Voltage Electrical as installation, service, and maintenance of energy-limited communication and low-voltage systems that do not exceed 91 volts. Telephone, sound, CATV, computer, CCTV, music, and satellite work fall in this classification when they stay within that energy-limited limit.
2Which of the following is specifically excluded from the Mississippi Communication Systems, Low Voltage Electrical classification?
A.Telephone systems
B.Low-voltage alarm systems
C.Closed-circuit video systems
D.Satellite dish antennas
Explanation: MSBOC expressly excludes low-voltage alarm systems from the Communication Systems classification. Telephone, sound, CATV, computer, CCTV, music, and satellite installations are listed as included work. Alarm work requires a separate classification.
3Which installation is within the official MSBOC Communication Systems classification when it is energy limited and does not exceed 91 volts?
A.A 120-volt lighting branch circuit
B.A music-distribution and public-address system
C.A fire-detection control panel and initiating circuit
D.A service-entrance feeder to a panelboard
Explanation: MSBOC lists music systems, sound systems, telephone, CATV, computer, CCTV, and satellite work as in-scope when they are energy limited and do not exceed 91 volts. Line-voltage lighting, service feeders, and alarm/fire-detection systems are outside this specialty classification.
4In the 2020 NEC, which article contains the general requirements that apply to communications systems unless modified by a later Chapter 8 article?
A.Article 725
B.Article 800
C.Article 810
D.Article 840
Explanation: The 2020 NEC created Article 800, General Requirements for Communications Systems, and moved former communications-circuit rules to Article 805. Article 800 holds the shared listing, installation, abandoned-cable, protector, and grounding rules that Articles 805, 820, 830, and 840 use unless they modify them.
5Which listed communications cable type is required in ducts, plenums, and other spaces used for environmental air?
A.Type CM
B.Type CMX
C.Type CMP
D.Type CMG
Explanation: Type CMP is communications plenum cable. It is listed for installation in ducts, plenums, and other environmental-air spaces because it has the required fire and low-smoke performance. CM, CMG, and CMX are not listed for plenum use unless another permitted wiring method, such as a metal raceway complying with 300.22, is used.
6Communications cable installed in a vertical run that penetrates more than one floor, and that is not in a metal raceway or fireproof shaft, must be which type?
A.Type CMX
B.Type CM
C.Type CMR or a higher listing such as CMP
D.Type CATVX only
Explanation: Type CMR is communications riser cable, listed to limit vertical fire spread between floors. CMP may substitute for CMR because it is a higher listing. General-purpose CM or limited-use CMX is not acceptable in an unprotected multi-floor riser.
7In a one- or two-family dwelling, which communications cable types are generally permitted for ordinary interior applications that are not plenum or riser spaces?
A.Only Type CMP
B.Type CM and Type CMX, as well as higher listings
C.Only unlisted outdoor station wire
D.Only Type OFNP optical fiber
Explanation: NEC communications listing rules allow Type CM and Type CMX, and any higher listing such as CMR or CMP, for typical one- and two-family dwelling applications. Plenum- or riser-rated cable is not required throughout a dwelling unless the space is actually a plenum or a multi-floor riser.
8Which statement correctly describes the NEC communications-cable substitution hierarchy?
A.Type CMX may be used in place of Type CMP
B.Type CM may be used in place of Type CMR in an unprotected riser
C.Type CMP may be used in place of Types CMR, CM, and CMX
D.Type CMR may be used in place of Type CMP in a plenum
Explanation: A higher fire listing may substitute downward. CMP is the highest common communications listing and may replace CMR, CM/CMG, and CMX. A lower listing cannot replace a higher one, so CMX cannot go in a plenum and CM cannot replace CMR in an unprotected riser.
9Per NEC 800.25, what must be done with the accessible portion of abandoned communications cable that is not identified for future use?
A.Leave it in place if it is not energized
B.Paint it red and coil it above the ceiling
C.Remove it
D.Splice it to the nearest active cable
Explanation: NEC 800.25 requires the accessible portion of abandoned communications cables to be removed. Abandoned cable is cable that is not terminated at both ends at a connector or other equipment and is not identified for future use with a durable tag. The rule reduces fuel load in concealed spaces.
10Where a listed primary protector is required on a communications circuit, it shall be located:
A.At the far end of the longest interior station run
B.As close as practicable to the point of entrance
C.Only at the equipment rack, regardless of entrance location
D.On the utility pole, never on the building
Explanation: NEC 800.90 requires a listed primary protector on communications circuits that need protection and requires that protector to be as close as practicable to the point of entrance. A short protector-to-ground path reduces voltage differences during lightning or power crosses.

About the MS Communication Systems Exam

Mississippi Communication Systems Contractor Examination is a classification trade examination administered by PSI for the Mississippi State Board of Contractors. The official open-book exam has 50 questions, a 70% passing standard, and 2 hours allowed. PSI examination fee is $120 per portion (bulletin updated 4/23/2026). This English-language MCQ bank is a study aid for the official content outline; it is not an official PSI form, does not replace the required Law and Business Management exam, and is not a substitute for MSBOC application review or the official open-book examination.

Questions

50 scored questions

Time Limit

2 hours

Passing Score

70%

Exam Fee

$120 (PSI Services LLC (for Mississippi State Board of Contractors))

MS Communication Systems Exam Content Outline

46%

Sound and Communications

Low-voltage sound and communication systems

12%

Services, Feeders, Branch Circuits and Overcurrent Protection

NEC services and overcurrent protection

12%

Conductors, Raceways and Enclosures

Conductors, raceways, and boxes

16%

General Knowledge and Calculations

Electrical theory and calculations

8%

Grounding and Bonding

Grounding and bonding of low-voltage systems

6%

Power Supplies

Power supplies for communication equipment

How to Pass the MS Communication Systems Exam

What You Need to Know

  • Passing score: 70%
  • Exam length: 50 questions
  • Time limit: 2 hours
  • Exam fee: $120

Keys to Passing

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

MS Communication Systems Study Tips from Top Performers

1Study only the approved references listed for this classification in the current PSI Mississippi Contractor bulletin (updated 4/23/2026)
2Practice open-book navigation with permanent tabs and indexes before test day
3Drill OSHA 29 CFR 1926 topics that appear across nearly every trade outline
4Confirm MSBOC classification scope and eligibility at msboc.us before scheduling with PSI
5All applicants must also pass Law and Business Management unless it is waived

Frequently Asked Questions

How many questions are on the MS Communication Systems exam?

The official PSI examination has 50 scored questions (plus possible unscored experimental items). Passing is 70% within 2 hours.

How much does the MS Communication Systems exam cost?

PSI lists $120 per examination portion (Candidate Information Bulletin updated 4/23/2026). MSBOC application fees are separate: $400 commercial or $50 residential. Additional classifications are $100 each.

Is the Mississippi contractor exam open book?

Yes. PSI administers MSBOC classification exams as open book. Only bulletin-listed approved references are allowed; temporary tabs such as Post-it notes are prohibited.

Do I still need the Law and Business Management exam?

Yes. MSBOC requires the Mississippi Law and Business Management exam (50 questions, 70%, 2 hours) of all applicants. Reciprocity may waive a trade exam in some cases but does not waive Law and Business.