Minnesota Security and
Communications Contractor Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. What is the primary purpose of a security alarm system?
A. Increase electrical load
B. Improve HVAC efficiency
C. Detect and report unauthorized entry or hazardous conditions
D. Reduce internet bandwidth
Answer: C. Detect and report unauthorized entry or hazardous conditions
Rationale: Security alarm systems are designed to detect intrusions, fire, or
other hazards and notify occupants or monitoring personnel.
2. Which organization publishes the National Electrical Code (NEC)?
,A. IEEE
B. OSHA
C. ANSI
D. NFPA
Answer: D. NFPA
Rationale: The National Fire Protection Association (NFPA) publishes the
NEC, which governs electrical installations.
3. Low-voltage communication cabling is generally classified under which
NEC article?
A. Article 110
B. Article 250
C. Article 800
D. Article 430
Answer: C. Article 800
Rationale: NEC Article 800 covers communications circuits and related
installation requirements.
4. What is the purpose of grounding in a security system?
A. Increase voltage
B. Improve signal speed
,C. Provide a safe path for fault current
D. Reduce battery life
Answer: C. Provide a safe path for fault current
Rationale: Grounding protects equipment and people by directing fault
current safely to earth.
5. A normally closed door contact is in its normal state when:
A. The door is open
B. Power is disconnected
C. The circuit is complete and the door is closed
D. The alarm is activated
Answer: C. The circuit is complete and the door is closed
Rationale: A normally closed contact maintains circuit continuity until the
protected opening is disturbed.
6. Which device detects movement using infrared energy?
A. Magnetic contact
B. Glass-break detector
C. Smoke detector
D. Passive infrared detector
Answer: D. Passive infrared detector
, Rationale: Passive infrared detectors sense changes in heat patterns
caused by movement.
7. What does CCTV stand for?
A. Central Circuit Television
B. Computer Controlled Television
C. Closed-Circuit Television
D. Controlled Camera Television
Answer: C. Closed-Circuit Television
Rationale: CCTV systems transmit video signals within a closed network for
surveillance purposes.
8. Which cable type is commonly used for Ethernet networks?
A. RG-6
B. Category 6 (Cat 6)
C. THHN
D. MC Cable
Answer: B. Category 6 (Cat 6)
Rationale: Cat 6 cable supports high-speed Ethernet communications and
data networking.
Communications Contractor Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. What is the primary purpose of a security alarm system?
A. Increase electrical load
B. Improve HVAC efficiency
C. Detect and report unauthorized entry or hazardous conditions
D. Reduce internet bandwidth
Answer: C. Detect and report unauthorized entry or hazardous conditions
Rationale: Security alarm systems are designed to detect intrusions, fire, or
other hazards and notify occupants or monitoring personnel.
2. Which organization publishes the National Electrical Code (NEC)?
,A. IEEE
B. OSHA
C. ANSI
D. NFPA
Answer: D. NFPA
Rationale: The National Fire Protection Association (NFPA) publishes the
NEC, which governs electrical installations.
3. Low-voltage communication cabling is generally classified under which
NEC article?
A. Article 110
B. Article 250
C. Article 800
D. Article 430
Answer: C. Article 800
Rationale: NEC Article 800 covers communications circuits and related
installation requirements.
4. What is the purpose of grounding in a security system?
A. Increase voltage
B. Improve signal speed
,C. Provide a safe path for fault current
D. Reduce battery life
Answer: C. Provide a safe path for fault current
Rationale: Grounding protects equipment and people by directing fault
current safely to earth.
5. A normally closed door contact is in its normal state when:
A. The door is open
B. Power is disconnected
C. The circuit is complete and the door is closed
D. The alarm is activated
Answer: C. The circuit is complete and the door is closed
Rationale: A normally closed contact maintains circuit continuity until the
protected opening is disturbed.
6. Which device detects movement using infrared energy?
A. Magnetic contact
B. Glass-break detector
C. Smoke detector
D. Passive infrared detector
Answer: D. Passive infrared detector
, Rationale: Passive infrared detectors sense changes in heat patterns
caused by movement.
7. What does CCTV stand for?
A. Central Circuit Television
B. Computer Controlled Television
C. Closed-Circuit Television
D. Controlled Camera Television
Answer: C. Closed-Circuit Television
Rationale: CCTV systems transmit video signals within a closed network for
surveillance purposes.
8. Which cable type is commonly used for Ethernet networks?
A. RG-6
B. Category 6 (Cat 6)
C. THHN
D. MC Cable
Answer: B. Category 6 (Cat 6)
Rationale: Cat 6 cable supports high-speed Ethernet communications and
data networking.
