Physical Security Flashcards
Kind of CCTV Lens to monitor large area
Wide angle lens with a small lens opening.
Manual Iris and Auto Iris Lens of CCTV
Manual iris lenses have a ring around the CCTV lens that can be manually turned and controlled. A lens that has a manual iris would be used in an area that has fixed lighting, since the iris cannot self-adjust to changes of light.
An auto iris lens should be used in environments where the light changes, such as an outdoor setting. As the environment brightens, this is sensed by the iris, which automatically adjusts itself. Security personnel will configure the CCTV to have a specific fixed exposure value, which the iris is responsible for maintaining.
An electrostatic IDS
Creates an electrostatic field, which is just an electricfield associated with static electric charges.
The IDS creates a balanced electrostatic field between itself and the object being monitored. If an intruder
comes within a certain range of the monitored object, there is capacitance change. The IDS can detect this change and sound an alarm.
Polycarbonate window
More resistant to breakage than standard window
Produce toxic flames when burned
More protection than standard acrylic windows
Class K fire
Commerical Kitchen
Suppressing agent - Wet chemicals
1987 Montreal Protocol act
Halon should not be used
Positive pressurization
High pressure inside the building.
Air goes out when open. (smoke goes out and no contaminates from outside enters)
CPTED - Crime Prevention through Environmnental design.
Combines the physical environment and sociology issues that surround it to reduce crime rates and the fear of crime.
Fire
Fire requires oxygen, high temperature, fuel and Chemical reaction.
1) Co2 displaces Oxygen
2) Water reduces temperature
3) Soda acid removes fuel
4) Halon interfere with chemical reaction of the fire
Humidity
High Humidity - Corrosion
Low Humidity - Static electricity