Commercial Intrusion Alarm Systems

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Commercial Intrusion Alarm Systems - Quiz


Questions and Answers
  • 1. 

    UL lists connectors and switches in which of its standards?

    • A.

      A. 631

    • B.

      B. 681

    • C.

      C. 634

    • D.

      D. 3001

    Correct Answer
    C. C. 634
    Explanation
    UL (Underwriters Laboratories) lists connectors and switches in its standard 634.

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  • 2. 

    2.   An inaccessible opening is one that is more than ______  feet above the ground or the roof of an adjoining building. 

    • A.

      A. 3

    • B.

      B. 14

    • C.

      C. 18

    • D.

      D. 20

    • E.

      E. None of the above

    Correct Answer
    C. C. 18
    Explanation
    C — UL 681 section 3.23: An opening is inaccessible if it is more than 18 feet above either the ground or the roof of an adjoining building.

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  • 3. 

    3. Pick the dimensions below that UL 681 considers to be a manhole-size opening? 

    • A.

      A. 48 x 2

    • B.

      B. 32 x 3

    • C.

      C. 24 x 4

    • D.

      D. 16 x 7

    • E.

      E. Any of the above

    Correct Answer
    D. D. 16 x 7
    Explanation
    D — A manhole opening must have a clear cross-section area of 96 square inches or more and have the smallest dimension exceeding 6 inches.

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  • 4. 

    4. Wiring that is run from a control to a safe/vault complete that is surface mounted shall be ______ .

    • A.

      A. in EMT

    • B.

      B. in rigid conduit

    • C.

      C. protected from damage

    • D.

      D. Any of the above

    Correct Answer
    D. D. Any of the above
    Explanation
    The correct answer is d. Any of the above. This means that wiring that is run from a control to a safe/vault complete that is surface mounted can be in EMT, in rigid conduit, or protected from damage. The choice of wiring method will depend on the specific requirements and regulations of the installation.

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  • 5. 

    5. When a device includes a tamper switch it shall be wired to its own protection circuit. 

    • A.

      A. True

    • B.

      B. False

    Correct Answer
    A. A. True
    Explanation
    When a device includes a tamper switch, it is necessary to wire it to its own protection circuit. This is because the tamper switch is designed to detect any unauthorized access or tampering with the device. By wiring it to its own protection circuit, any tampering or unauthorized access will trigger the circuit and alert the appropriate authorities or system administrators. This helps ensure the security and integrity of the device and its data.

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  • 6. 

    6. ______ wall construction does not require protection for a UL listed system at extent #2. 

    • A.

      A. Gypsum block

    • B.

      B. Brick

    • C.

      C. Cinder block

    • D.

      D. Concrete

    • E.

      E. All of the above

    Correct Answer
    D. D. Concrete
    Explanation
    D — UL 681, Section 4.1.3.1, “Accessible ceiling, floors, and walls constructed of monolithic concrete or pre-cast concrete building panels do not require protection.”

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  • 7. 

    7. Movable openings that are considered non-accessible need not be protected for an extent #2. 

    • A.

      A. True

    • B.

      B. False

    Correct Answer
    A. A. True
    Explanation
    This statement is true because movable openings that are considered non-accessible do not need to be protected for an extent #2. This means that there is no requirement to provide any form of protection or security measures for these openings.

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  • 8. 

    8. Walls considered to be accessible require protection for an extent #3. 

    • A.

      A. True

    • B.

      B. False

    Correct Answer
    A. A. True
    Explanation
    A — Protection of walls, floors and ceilings is only required for extent #1 and extent #2.

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  • 9. 

    9. Central station burglar alarm units are listed in the UL standard # ______  .

    • A.

      A. 631

    • B.

      B. 1631

    • C.

      C. 610

    • D.

      D. 1610

    Correct Answer
    D. D. 1610
    Explanation
    Central station burglar alarm units are listed in the UL standard # 1610.

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  • 10. 

    10. Photoelectric units shall be mounted so that the beam is not less than ______  inches nor more than ______  inches from the floor. 

    • A.

      A. 6/12

    • B.

      B. 12/24

    • C.

      C. 18/36

    • D.

      D. 24/48

    Correct Answer
    C. C. 18/36
    Explanation
    Photoelectric units need to be mounted at a specific height from the floor to ensure proper detection and functionality. The correct answer of 18/36 inches means that the beam should be mounted at a minimum height of 18 inches and a maximum height of 36 inches from the floor. This range allows for flexibility in installation while still maintaining the effectiveness of the photoelectric unit.

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  • 11. 

    11. Which UL standard governs the installation and classification of burglar and holdup alarm systems? 

    • A.

      A. 365

    • B.

      B. 634

    • C.

      C. 639

    • D.

      D. 681

    Correct Answer
    D. D. 681
    Explanation
    UL standard 681 governs the installation and classification of burglar and holdup alarm systems. This standard provides guidelines for the installation, testing, and maintenance of these systems to ensure their effectiveness and reliability. It covers various aspects such as system components, wiring, power supplies, and monitoring requirements. Compliance with this standard helps ensure that burglar and holdup alarm systems are installed and operated safely and efficiently.

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  • 12. 

    12. A vault complete system must activate an alarm if an opening of 90 square inches is made in the vault or vault door. 

    • A.

      A. True

    • B.

      B. False

    Correct Answer
    B. B. False
    Explanation
    B — Refer to question 3.

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  • 13. 

    13. In order to provide complete protection of a vault door a motion detection device can be used. 

    • A.

      A. True

    • B.

      B. False

    Correct Answer
    B. B. False
    Explanation
    B — An alarm must be generated if a manhole-sized opening is made in the door; therefore, a motion detector is not acceptable.

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  • 14. 

    14. To protect a safe, ordinary-use alarm contacts may not be used. 

    • A.

      A. True

    • B.

      B. False

    Correct Answer
    A. A. True
    Explanation
    A — Ordinary use contacts always may be used on a complete safe. They must be mounted on the inside of the safe or on the outside if used in conjunction with a capacitance alarm unit.

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  • 15. 

    15. A splice shall be provided with insulation ______ .

    • A.

      A. that consists of at least two layers of electrical tape

    • B.

      B. equivalent to that of the wires involved

    • C.

      C. stripped from a larger wire and placed over the splice

    • D.

      D. All of the above

    • E.

      E. None of the above

    Correct Answer
    B. B. equivalent to that of the wires involved
    Explanation
    B — UL 645, Section 8.7.

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  • Current Version
  • Apr 12, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Dec 05, 2016
    Quiz Created by
    SDMMagazine
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