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100+ Free SC Burglar Alarm Practice Questions

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2026 Statistics

Key Facts: SC Burglar Alarm Exam

50 Q

Official Exam Questions

PSI SC Commercial Contractor CIB updated 5/15/2025

70%

Passing Score (35 of 50)

PSI SC Commercial Contractor CIB updated 5/15/2025

3 hours

Time Allowed

PSI SC Commercial Contractor CIB updated 5/15/2025

USD 60

PSI Exam Fee

PSI SC Commercial Contractor CIB updated 5/15/2025

Open Book

Book Policy

PSI SC Commercial Contractor CIB updated 5/15/2025

South Carolina Burglar Alarm Contractor Examination is the official CLB/PSI open-book exam: 50 questions, 70% (35 of 50), 3 hours, USD 60 (bulletin updated 5/15/2025). Official delivery is English.

Sample SC Burglar Alarm Practice Questions

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

1A 12-volt DC alarm circuit has a total resistance of 48 ohms. What is the circuit current?
A.0.25 ampere
B.0.40 ampere
C.2.5 amperes
D.4.0 amperes
Explanation: Ohm's law states that current equals voltage divided by resistance (I = E / R). Dividing 12 volts by 48 ohms gives 0.25 ampere, or 250 milliamperes. Alarm-panel auxiliary-power and zone-loop calculations use this same relationship.
2An outdoor siren draws 1.5 amperes from a 12-volt DC auxiliary output. What power does the siren consume?
A.8 watts
B.13.5 watts
C.18 watts
D.24 watts
Explanation: Power equals voltage times current (P = E × I). Multiplying 12 volts by 1.5 amperes yields 18 watts. That wattage is what the battery and transformer must supply while the siren is sounding.
3Three resistors of 10 ohms, 15 ohms, and 25 ohms are connected in series. What is the total resistance?
A.5.9 ohms
B.15 ohms
C.25 ohms
D.50 ohms
Explanation: Series resistances add: RT = R1 + R2 + R3. Adding 10 + 15 + 25 gives 50 ohms. A series alarm loop of several magnetic contacts behaves the same way—the panel sees the sum of the wire and device resistances.
4Two 24-ohm resistors are connected in parallel. What is the equivalent resistance?
A.12 ohms
B.8 ohms
C.24 ohms
D.48 ohms
Explanation: Equal parallel resistors have an equivalent of one resistor divided by the count. Two 24-ohm resistors in parallel equal 12 ohms. The product-over-sum check is (24 × 24) / (24 + 24) = 12 ohms.
5A 4-ohm speaker is driven at 2 amperes. What power is dissipated in the speaker?
A.2 watts
B.16 watts
C.32 watts
D.8 watts
Explanation: When current and resistance are known, use P = I²R. Squaring 2 amperes gives 4, and 4 × 4 ohms is 16 watts. The same 16 W result comes from first finding E = IR = 8 V, then P = EI = 16 W.
6NEC 210.19 Informational Note No. 4 recommends limiting voltage drop on a branch circuit to no more than which amount under load?
A.1 percent
B.3 percent
C.8 percent
D.10 percent
Explanation: The 2020 NEC Informational Note at 210.19 recommends a maximum of 3 percent voltage drop on a branch circuit and 5 percent on the feeder plus branch combined. The note is not a mandatory rule, but PSI open-book electrical items treat those figures as the design target.
7Per 2020 NEC Table 310.16, what is the allowable ampacity of 12 AWG copper THWN in a raceway at 75°C, not more than three current-carrying conductors, 30°C ambient?
A.25 amperes
B.20 amperes
C.30 amperes
D.35 amperes
Explanation: Table 310.16 lists 12 AWG copper at 25 amperes in the 75°C column (THWN, THW, and similar). The 90°C THHN column is 30 amperes, but terminations on most 100-ampere-and-smaller equipment are 75°C unless marked otherwise, so 25 A is the table value used for sizing.
8Unless an exception in 240.4(E) or (G) applies, what is the maximum overcurrent device rating permitted to protect a 12 AWG copper conductor?
A.15 amperes
B.20 amperes
C.25 amperes
D.30 amperes
Explanation: NEC 240.4(D) is the small-conductor rule. It limits 12 AWG copper to a 20-ampere overcurrent device in ordinary branch-circuit use, even though Table 310.16 lists a higher 75°C ampacity. 14 AWG is capped at 15 A and 10 AWG at 30 A.
9A 12-volt DC power run is 80 feet one-way to a 0.40-ampere load. Using copper K = 12.9 and 22 AWG (640 circular mils), what is the approximate voltage drop?
A.0.32 volt
B.0.64 volt
C.1.29 volts
D.2.58 volts
Explanation: Single-phase (or DC two-wire) voltage drop is VD = (2 × K × I × D) / CM. Substituting gives (2 × 12.9 × 0.40 × 80) / 640 = 825.6 / 640 = 1.29 volts. That is more than 10 percent of 12 V, so 22 AWG is too small for this run.
10A 0.50-ampere current flows through a 16-ohm resistor. What voltage appears across the resistor?
A.8 volts
B.16 volts
C.32 volts
D.0.03 volt
Explanation: Ohm's law for voltage is E = I × R. Multiplying 0.50 ampere by 16 ohms yields 8 volts. That is a typical check when measuring a known current-limiting resistor or a loaded alarm circuit.

About the SC Burglar Alarm Exam

The South Carolina Burglar Alarm Contractor Examination is the official CLB classification examination administered by PSI. The official exam has 50 scored questions. Passing is 70% (35 of 50) in 3 hours. The examination is open book. PSI lists USD 60 (South Carolina Commercial Contractor Candidate Information Bulletin updated 5/15/2025). Candidates must also pass the Alarm Code of Laws Examination. NTS Level I is required. Burglar and fire alarm contractor candidates are not required to have work experience as an examination prerequisite. Candidates must also pass the Alarm Code of Laws Examination. They do not take the Business Management and Law for Commercial Contractor Examination. LLR charges a separate USD 350 license application fee. This bank is an English-language MCQ study adaptation. It does not replace required trade experience, board approval, financial statements or bonds, or the official examination.

Assessment

Open-book computer-based multiple-choice. Allowed references are listed in the South Carolina Commercial Contractor Candidate Information Bulletin updated 5/15/2025.

Time Limit

3 hours

Passing Score

70% (35 of 50)

Exam Fee

USD 60 (PSI Services LLC (for the South Carolina Contractor's Licensing Board))

SC Burglar Alarm Exam Content Outline

28%

General Electrical Knowledge

General Electrical Knowledge (14 items)

18%

Low Voltage

Low Voltage (9 items)

20%

Intrusion Detection and Alarm Systems

Intrusion Detection and Alarm Systems (10 items)

34%

Alarm Technology

Alarm Technology (17 items)

How to Pass the SC Burglar Alarm Exam

What You Need to Know

  • Passing score: 70% (35 of 50)
  • Assessment: Open-book computer-based multiple-choice. Allowed references are listed in the South Carolina Commercial Contractor Candidate Information Bulletin updated 5/15/2025.
  • Time limit: 3 hours
  • Exam fee: USD 60

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

SC Burglar Alarm Study Tips from Top Performers

1Distribute study time to the official PSI content outline (bulletin updated 5/15/2025)
2Use only the PSI-listed references for this classification
3Temporary tabs such as Post-it notes are prohibited in the PSI center
4This bank is an English-language MCQ study aid, not an official PSI form

Frequently Asked Questions

How many questions are on the South Carolina Burglar Alarm Contractor Examination?

The official PSI examination has 50 scored questions. Passing is 70% (35 of 50) within 3 hours (South Carolina Commercial Contractor Candidate Information Bulletin updated 5/15/2025).

How much does the SC Burglar Alarm exam cost?

PSI lists USD 60 for this examination. The South Carolina Contractor's Licensing Board charges a separate USD 350 license application fee.

Is the SC Burglar Alarm exam open book?

Yes. PSI lists the commercial contractor examinations as open book. Candidates may bring the PSI-listed references for this classification. Temporary tabs such as Post-it notes are prohibited.

What extra requirements apply to the SC burglar alarm classification?

Candidates must pass this technical examination and the Alarm Code of Laws Examination. NTS Level I is required. Work experience is not an examination prerequisite. Alarm examinations may be taken as often as desired.