Chapter 15 Communications, Life Safety, and Security Systems
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) Most telecommunications systems operate on DC circuitry. Why? 1) _______
A) DC is safer than AC.
B) DC devices are more sensitive than AC.
C) DC devices are much less expensive.
2) Which of the following are the two modes by which communications are transmitted? Select all
that apply.
2) _______
A) Voltage exertion. B) Modulation.
C) Analogue. D) Digital.
3) How would you define bandwidth? 3) _______
A) The peak frequency that can be achieved without excessive attenuation.
B) The amplitude range of a system under ideal conditions.
C) The number of data packets that can be transmitted legibly.
4) Which is the most commonly used method for conducting data in office communications
systems?
4) _______
A) Fiber optic cable. B) Coax cable. C) Twisted pair.
5) Which is the most commonly used method for conducting data long distances? 5) _______
A) Fiber optic cable. B) Coax cable. C) Twisted pair.
6) Which of the following statements is true regarding frequencies of radio communications? Select
all that apply.
6) _______
A) US regulatory agencies are the NTIA of the Department of Commerce and the FCC.
B) Use of specific frequencies is regulated, but general ranges of frequency usage are not.
C) Frequencies allocated by other countries are generally well coordinated with the US.
7) What is a VPN? 7) _______
A) Keeps other parts of the VPN entity from using corporate software, enhancing security.
B) Allows nodes of a wide area network to connect by internet.
C) Allows separate corporate entities to share information without technical barriers.
8) Wiring used to coordinate the transmission of data is called which of the following? 8) _______
A) Structured wiring.
B) Analog/digital system wiring.
C) Local area network cable.
9) What should happen when a security monitoring device is activated? Select all that apply. 9) _______
A) The event should be recorded.
B) The event should be annunciated in an appropriate way.
C) There should be a telecon to the local fire department.
10) What functions might be included in a large fire alarm system? Select all that apply. 10)
______
A) Interface with building management systems.
B) Account for personnel as they reach safe refuge.
C) Transmit audio messages to occupants.
D) Identify location of the fire.
11) Which of the following systems has achieved the highest gain in popularity in recent past years? 11)
______
A) Videoconferencing. B) Time and program systems.
C) Wireless telephone. D) Sound systems.
