Security Science Quiz

1. Double-pole, double-throw telephone line seizure requires how many wires?

a) 2

b) 4

c) 8

d) It depends on the authority having jurisdiction

2. A one-way radio provides the same level of line security as a two-radio when:

a) Never

b) The radio is installed in a protected area of the premises

c) The radio is installed in an unprotected area of the premises 

d) A UL certificate is issued

3. An alarm system is considered to be UL certificated by an alarm service company when:

a) The system is connected to a UL-Listed central station

b) All equipment is UL Listed for its intended use

c) Four-step volumetric detection coverage is provided

d) A UL certificate is issued 

4. A UL-Listed carbon monoxide detector has a detection range of:

a) 900 square feet

b) 30 square feet

c) At the sensor

d) 90 square feet

5. A 7-amp/hour rechargeable battery contains how many milliamps?

a) 1,000

b) 70

c) 7,000

d) 750

6. The acronym DACT refers to what type of technology?

a) Digital alarm communications technology

b) Digital alarm communicator transmitter

c) Digital alert check technique

d) Digital alarm console tamper

7. For an alarm circuit in its normal state with electrons flowing, what type of protective loop circuit would you expect to find?

a) Normally open circuit

b) Open circuit

c) Normally zone expanded circuit

d) Normally closed circuit

8. For an alarm circuit in its normal state with electrons not flowing, what type of protective loop circuit would you expect to find? 

a) Normally open circuit

b) Double circuit

c) Normally zone expanded circuit

d) Normally closed circuit

9. When electronically protecting a safe, what type of alarm technology is generally used as a best practice?

a) Alarm contacts and motion detectors

b) Safe alarm contacts and floor mats on all four corners of the outer safe wall

c) Alarm contacts and EVD

d) Alarm contacts and active infrared beams

10. The following technology can be used to provide telephone line security to the protected premises:

a) Double circuitry

b) LRR

c) RPM

d) Module T-diode supervision

11. To the extent Primary power of an alarm system is lost at the protected premises, the alarm system will generally continue to operate using what type of backup?

a) Generator

b) Solar cell

c) Alkaline battery

d) Lead-acid battery

12. Active IR detectors contain the following technical characteristics:

a) Transmitter and receiver

b) Doppler shift requirement

c) Line of sight requirement

d) Both a and c

13. What UL standard applies to entry into a protected OR restricted area, or when access to, or the use of a device(s) by electrical, electronic or mechanical means occurs?

a) UL 283

b) UL 1635

c) UL 687

d) UL 294

14. UL 1635 applies to:

a) A residential alarm system

b) A vehicle alarm system

c) A home health care medical alert control unit

d) Both a and c

15. A TXTL-60X 6 refers to the following type of security equipment:

a) 60 X 6 dual technology motion detector

b) 60 X 6 dual beam photo-electronic transmitter and receiver unit

c) Burglary-resistant safe

d) Electromagnetic door lock

Jeffrey D. Zwirn, CPP, CFPS, CFE, DABFET, CHS-III, SET, RI, is a forensic alarm industry expert and President of Teaneck, N.J.-based IDS Research & Development Inc. He can be reached at (201) 287-0900 or [email protected] This column is not intended as legal advice and should not be construed as such.


Documentation To-Do List

1. Testing of a system ambush code should always be verified with the central station and performed directly with the subscriber on site, as well as documented with the subscriber in writing.

2. Subscribers should be warned in writing that changing their premises telephone lines or their particular type of phone service, can negatively affect successful signal transmission by the digital alarm communicator transmitter (DACT) of the system for central station monitoring.

3. All RJ-31X telephone jacks should be labeled to warn unaffiliated contractors an alarm system is connected to the respective telephone line and not to disconnect and/or tamper with it.

Tagged with: Security Science

About the Author


Jeffrey D. Zwirn, CPP, CFPS, CFE, FACFEI, CHS-IV, SET, CCI, FASI&T, MBAT, writes Security Sales & Integration’s “Security Science” column. He is also president of IDS Research and Development, an alarm and security consultation, expert witness and training authority providing nationwide services on all issues related to alarm and security matters. He can be reached at (201) 287-0900.

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