Physical Security Flashcards

1
Q

Kind of CCTV Lens to monitor large area

A

Wide angle lens with a small lens opening.

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2
Q

Manual Iris and Auto Iris Lens of CCTV

A

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.

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3
Q

An electrostatic IDS

A

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.

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4
Q

Polycarbonate window

A

More resistant to breakage than standard window
Produce toxic flames when burned
More protection than standard acrylic windows

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5
Q

Class K fire

A

Commerical Kitchen

Suppressing agent - Wet chemicals

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6
Q

1987 Montreal Protocol act

A

Halon should not be used

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7
Q

Positive pressurization

A

High pressure inside the building.

Air goes out when open. (smoke goes out and no contaminates from outside enters)

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8
Q

CPTED - Crime Prevention through Environmnental design.

A

Combines the physical environment and sociology issues that surround it to reduce crime rates and the fear of crime.

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9
Q

Fire

A

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

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10
Q

Humidity

A

High Humidity - Corrosion

Low Humidity - Static electricity

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