3.0—Home Security and Surveillance Systems

154
Chapter
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3
Exam Prep Questions
Question 1
What is the name of the device that allows four surveillance camera images to
be viewed on a monitor at the same time?
❍ A. A video splitter
❍ B. A modulator
❍ C. A quad switcher
❍ D. A photoelectric sensor
Answer C is correct. A quad switcher is designed to provide simultaneous
viewing of four cameras on one monitor using a split-screen display. Answer
A is incorrect because a video splitter is used with TV antenna systems and
is not an active component required with four-camera surveillance systems.
Answer B is incorrect because a modulator is not required for viewing
images. Answer D is incorrect because a photoelectric sensor is used to monitor
ambient light conditions for security systems and is not required as a
component in a video surveillance system.
Question 2
Which type of jack is required to be installed to allow the security system to
seize the line when an alarm condition exists?
❍ A. RJ-11x
❍ B. RJ-45
❍ C. RJ-12
❍ D. RJ-31x
Answer D is the correct answer. The RJ-31x jack is used to disconnect all the
phones in the home when an alarm condition is initiated. This enables the
alarm panel to have priority over all uses of the phone when it needs to call
the outside monitoring facility. Answers A and C are incorrect because both
types of RJ-11 jacks are used for standard telephone four-wire connections
and are not applicable to security system connections. Answer B is incorrect
because RJ-45 connectors are used for four-pair UTP cabling in local area
network networks and are not required for security system applications.