CCTV CCTV Installation and Maintenance 2

Question 1

When mounting a dome camera on a suspended ceiling, which hardware is most appropriate?

Accepted Answer

Pendant mount with ceiling adapter

Answer

A pendant mount with ceiling adapter provides the structural support and proper angle adjustment needed for suspended ceiling installations.

Question 2

What does the term 'IP66' rating indicate on a CCTV camera enclosure?

Accepted Answer

The enclosure is dust-tight and protected against powerful water jets

Answer

IP66 means the enclosure is completely dust-tight (6) and protected against powerful water jets from any direction (6).

Question 3

A technician notices video signal degradation over a long coaxial cable run. Which device should be installed to correct this?

Accepted Answer

In-line video amplifier

Answer

An in-line video amplifier boosts the signal strength to compensate for attenuation over long coaxial cable runs.

Question 4

What is the recommended minimum overlap percentage when planning multiple camera fields of view for complete coverage?

Accepted Answer

20%

Answer

A 20% overlap between adjacent camera views ensures there are no blind spots and provides redundancy at coverage boundaries.

Question 5

Which cable type is preferred for PTZ camera control signals over long distances?

Accepted Answer

RS-485 twisted pair

Answer

RS-485 twisted pair cable is the standard for PTZ control signals because it supports long-distance, noise-resistant differential signaling.

CCTV - Closed Circuit Television Practice Test