C7 Security System Design & Integration 2

Question 1

When designing a layered security system, what is the correct order of protection zones from outermost to innermost?

Accepted Answer

Perimeter, exterior, interior, core assets

Answer

Defense-in-depth security design moves from perimeter (property boundary) through exterior (building shell) to interior zones and finally to the most critical core assets.

Question 2

A UL Listed central station must maintain records of alarm signals for a minimum of how long under UL 827?

Accepted Answer

1 year

Answer

UL 827 requires UL Listed central stations to retain alarm signal records for a minimum of one year.

Question 3

Which wire gauge is typically specified for a 4-wire smoke detector circuit running 500 feet in a commercial security installation?

Accepted Answer

18 AWG

Answer

18 AWG is commonly specified for longer 4-wire detector runs to limit voltage drop while staying within NFPA 72 and manufacturer requirements.

Question 4

In a video surveillance design, what is the primary purpose of using a varifocal lens over a fixed lens?

Accepted Answer

Varifocal lenses allow field-of-view adjustment without changing the camera

Answer

Varifocal lenses allow the installer to adjust focal length and field of view after mounting, accommodating varied coverage needs without swapping cameras.

Question 5

When integrating an access control system with a fire alarm panel, what is the required behavior of electrified door locks during a fire alarm activation?

Accepted Answer

Locks must release to allow free egress per NFPA 101

Answer

NFPA 101 Life Safety Code requires that electrified locks release upon fire alarm activation to provide unimpeded egress.

(C7) California C7 Low Voltage Systems Contractor Certification Practice Test

(C7) California C7 Low Voltage Systems Contractor Certification Practice Test

C7 Security System Design & Integration 2