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