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WorksheetsTest & Troubleshooting
Total questions: 15
Worksheet time: 8mins
What is the smallest amount of light needed for the camera to produce a useable image?
Lux
Meters
Candles
Lumens
What is needed for a CCTV camera to produce images?
Flash
Lux units
Natural light
Infrared light
How is the image quality affected by the amount of light available in the scene?
The less light the better the image
The image will become noisy or dark
The less light the better the image
The more light the better the image
What type of cables can be tested with a cable tester?
CAT5e/6
Fiber Optic
UTP and Coaxial
All of the above
What is the most important parameter for fiber optic testing?
Visible LEDs
Battery Power
Optical Power
Ground Status
What is the primary purpose of a colour reference chart in CCTV systems?
To measure resolution
To identify license plates
To adjust the field of view
To assess the colours in an image
What type of light is blocked when the Neutral Density filter is switched on?
Visible light
Infrared light
Polarized light
Ultraviolet light
What can cause interference problems in a system?
Eliminating grounding pins from the outlets
Lack of ground at each point of the installation
Different ground at each point of the installation
All of the above
What is the "Ground Loop" problem in video surveillance systems?
It is the effect of an electromagnetic field on the camera.
It is a problem caused by the direct connection between the devices.
It is the interference generated by the circulation of an electric current through the coaxial cable.
It is a problem caused by the grounding of the devices.
In which scenario is the best way to avoid the "Ground Loop" interference problem?
When all devices are connected together and grounded to different points.
When all devices are connected together and grounded to the same point
When all devices are not connected together and grounded to different points.
When all devices are not connected together and grounded to the same point.
What is the role of the resistance in a grounding system?
To increase the voltage between the devices.
To decrease the current flowing through the devices.
To eliminate the potential difference between the devices.
To increase the electromagnetic interference.
What is the solution to eliminate the voltage difference between devices in a real scenario?
To connect all devices directly to each other.
To ground all devices to different points.
To ground only some of the devices.
To ground all devices to the same point.
What is a common cause of IR glare?
Darkly colored surfaces
Reflective surfaces
Low light conditions
Objects too close to the camera
What is the most common cause of faulty video surveillance systems?
Bad cable quality
Long distances
Loss of power sources
Incorrect voltage ratings
What is a common cause of problems in video surveillance systems?
Loss of power sources
Poor cable quality
Insufficient voltage
All of the above
