Protective Systems midterm

How many types of glass are used in construction?

3 (tempered, laminated, plate)

A door contact loop will be ? when the door is in the closed or secured position.

Closed

Which is a common magnetic switch configuration?

Closed loop, DPDT, open loop, and SPDT

What is a form of identification that determines who is authorized for access?

Credential

What must an installer keep in mind when installing a glassbreak detector?

Heavy drapes may affect the performance of the detector, the detector must be in the direct line of sight of the window being protected

Motion detectors should be placed in locations where there is a ?.

High probability of an intruder crossing

When installing a roller plunger switch on a door, where must it be mounted?

On the hinge side of the door below the lowest hinge

A door contact will be ? when the door is in the open or off normal position.

Open

Which devices are connected as an open loop while in a secured state?

Panic button, smoke detector, tamper switch, temp sensor

Which is not an operational category for an intrusion detection system?

Proprietary alarm system

Door contacts or magnetic sensors are devices that use an internal ? switch in conjunction with a magnet.

Reed

What frequencies travel through the breaking glass, the surrounding window frame and the surrounding walls and ceiling?

Shock

Which is not an acoustic frequency generated from the sound of breaking glass?

Shock

The purpose of a ? is to alert an individual that the alarm system has been triggered.

Siren

Which type of glass shatters into thousands of tiny pieces?

Tempered

What causes a PIR to suffer from a loss of range?

The background temp reaches between 84F and 100F

How far will a signal from a microwave detector travel?

Theoretically, a microwave signal can go on forever

A zone is defined as the division of a security system into smaller segments.

True

A PIR detector requires a(n) ? change to trip.

3.6F

What percentage of false alarms are caused by the homeowner?

90%

When protecting an attic vent, an electrical worker could use a ?.

Barrier bar

Which location is suitable for an acoustic sensor?

Bedrooms

When installing an acoustic sensor, an electrical worker should avoid areas such as ?.

Corner mounting, kitchens, and small utility rooms

What type of lens pattern is needed on a PIR to protect areas under skylights or near roof entries?

Curtain lens

An individual wanting to exit a dwelling equipped with an intrusion detection system, must wait the specific amount of time before being able to exit through the door describes a(n) ?.

Delayed egress

Which motion sensor technologies are currently used in the security industry?

Dual-technology, fresnel, and mirror/curtain

When installing a recessed contact under a threshold, why must an electrical worker use a wide gap switch?

Due to the distance between the magnet and the switch

? is protection provided to a specific object, such as a safe.

Spot protection

Residential customers will typically be more concerned with ?.

Appearance

What technology is used for Optical Turnstiles?

Infrared sensors and light beams

Which is not a primary component of a PIR?

Acoustic sensor

The ? feature prohibits a second use of a credential within a given time frame or until it is used at a second location.

Anti-passback

What is the typical break distance for magnetic contacts?

Approximately 1.1 to 1.5 times the "make" distance

Which mode will turn on all exterior and interior protection devices, while still allowing the exit and entrance delay times?

Away mode

Where is the best location when installing a silent panic switch in a walk-in freezer?

Between the floor and 4" below the door knob

An automated method used to identify or authenticate the identity of a living person based on certain physiological or behavioral characteristics is defined as ?.

Biometrics

Which could be a potential issue with microwave detectors?

Bothered by moving metal objects, bothered by vibration of mounting surface, difficult to detect slow moving objects, microwaves travel in a straight line and will theoretically go on forever, objects can block the field of view

What types of sources may cause false alarms for PIRs?

Bright white lights, direct sunlight, forced air duct, pets, reflected sunlight, rodents, space heater

How can the gap distance of a recessed switch be increased, when there is no wide gap switch?

By placing two magnets side-by-side with the like poles in the same direction.

Which are considered to be input devices?

Card reader, door contact, glass break detector, and motion detector

A monitoring center that is manned 24 hours, seven days a week to receive signals transmitted by security systems is known as a ?

Central station

A security system is intended to ?.

Deter a burglary and limit the loss of personal property

An example of a contact being used on a closed loop circuit is a ?.

Door or window

Magnetic contacts are sensors commonly used to protect and monitor the status of ?.

Doors and windows

A central station alarm system provides protection for a facility only when the business or residence is occupied.

False

A fail safe lock remains locked when there is a power or equipment failure, while a fail-secure lock unlocks during a power or equipment failure.

False

Blocking the field of view of a PIR will have very little impact on a motion sensor.

False

Some revolving doors incorporate an electromagnetic break-away device, usually located in the drum. The installer should try to locate the magnetic contact dad close as possible to the device.

False

Which is a good application for surface-mounted contacts?

File cabinets, roll-up garage doors, safes

According to statistics, what is the most likely location an intruder will use the break into a house?

Front door

When installing a security system, where should the control panel be located?

In a protected area

Acoustic sensors can only detect glass that is ? of the sensor

In direct line of sight

What type of glass has a thin film of plastic sandwiched between two panes of glass?

Laminated

An alarm that is self-contained and does not require off premise monitoring would be considered what type of alarm system.

Local

What magnetic contact could be used to protect multiple guns in a gun rack?

Magnapull

What is the reason for including electrical ratings for magnetic contacts?

NFPA requires the rating, so the electrical worker knows and does not exceed the electrical limitations of the contact, to ensure that the correct contact is used for the voltage applied to the open loop or closed loop circuit

A(n) ? detector monitors the environment and trips when the radiant heat energy signature (pattern) of an intruder is detected.

Passive infrared

Which type of glass breaks into large jagged pieces?

Plate

Acoustic sensors detect glassbreak frequencies, they cannot detect ?.

Plexiglass

? protection is a type of perimeter protection where emphasis is placed on those specific points that might allow entry or exit from a secure area.

Point-of-entry

Magnetic contacts used to secure doorways, require the ? portion of the device installed on the door or window frame and the ? portion installed on the moving part of the door or window.

Sensor/magnet

? is protection provided to one specific location. This may be an area where sensitive documents are stored or where valuables are kept.

Specific area protection

The mode that turns on all exterior protection devices only, while still allowing the exit and entrance delay times.

Stay

What is the preferred installation method when installing window contacts?

Surface mounting

Why are concealed surface-mount contacts preferred over recessed mount contacts for protecting Pella casement or awning windows?

The construction of these windows makes recess mounting difficult without breaking the glass and may void the manufacturer's warranty.

How are explosion-proof switches different from standard duty switches?

They are UL listed for hazardous locations

Based on the time of day, a feature that enables the alteration of system parameters, such as door locking, disarming security, and granting access to an area is defined as a(n) ?.

Time zone

What is the purpose of masking?

To block potential false alarm sources from the PIR's field of view

What is the purpose of an end-of-line device (conventional circuits)?

To protect or supervise the integrity of the circuit

What is the e purpose of a PIR?

To trigger an alarm when it detects the image of an intruder

A PIR motion detector is called "passive" because it contributes no energy of its own.

True

A bill trap holds paper currency between a magnetized clip and a back plate that contains magnetic reed contacts.

True

A two-way voice feature enables the central station operator to listen-in to the sounds at the protected premises and to talk with the occupants at the premises.

True

Acoustic sensors should be tested during installation to ensure proper operation and location of the sensor.

True

An addressable device has a unique address/ID code that helps pinpoint its location while troubleshooting a system problem.

True

By definition, a theft does not need to occur in order to classify illegal entry as a household burglary.

True

Commercial security systems and residential security systems typically use the same components.

True

Dual-technology sensors must receive the airborne acoustic signal, while also detecting the mechanical vibrations that travel through the walls and ceiling. Both must occur for the sensor to alarm.

True

Dual-technology sensors require both an acoustic signal and a mechanical vibration to recognize breaking glass.

True

In a PIR, thermal energy from a well-defined field of view is focused onto an extremely sensitive pyroelectric sensor. The sensor the transforms this thermal energy into an electric pulse that can trigger an alarm.

True

Reverse voltage spikes can cause contacts to fuse together. In many instances, this can be corrected by tapping on the contact.

True

With a supervisory alarm system, a central monitoring point is established for the purpose of providing constant monitoring of alarm status.

True

A glass mounted shock sensor is tested for proper installation by ?.

Using special test equipment from the manufacturer

When would a duress (ambush) code be used?

When a person is forced to turn off the security system