Week 32 Chapter 17 Part 1 - Pages 17-1 to 17-30 Flashcards
To ensure general audibility, in the United States, NFPA 72 require that public mode fire alarm signaling achieves output levels of ___ over average ambient sound (dBA) levels.
a. 20 dB
b. 15 dB
c. 10 dB
d. 5 db
b. 15 dB
p 17-27
Codes and standards contain extensive rules and guidelines to address these issues. To ensure general audibility in the United States, NFPA 72® requires that public mode signaling achieves output levels of 15 dB over average ambient sound (dBA) levels, or 5 dB over the maximum dBA level having duration of at least 60 seconds in all areas of protected premises.
A typical electronic access control (EAC) cable consists of four ___ that are used for the door strike, card reader, door contact, and request for exit.
a. Twisted pairs surrounded by an overall shield
b. Strands of multimode optical fiber
c. Unshielded twisted pairs
d. Individually shielded pairs
d. Individually shielded pairs
p 17-10
EAC systems may be part of a converged network and utilize the structured cabling system for connectivity and power. An analog-type EAC cable consists of four individually shielded pairs.
The four individual wire pairs may be supplied individually or in a group. Colored foil shields or jacket colors may be used to designate the intended purpose of each of the wire pairs within the cables.
In terms of lock types, A grade ___ lock has been tested to be more durable than a grade ___.
a. 1, 2
b, 2, 1
a. 1, 2
p 17-13
The term grade is often used to classify hardware by durability. A grade 1 lock has been tested to be more durable than a grade 2. A grade 2 has been tested to be more durable than a grade 3.
Electric strike’s unlock time, ___ to ___ seconds, is normally set by the EAC system headend .
a. 2, 6
b. 4, 10
c. 8, 11
d. 10, 14
c. 8, 11
p 17-14
- Electric strike’s unlock time, 8 to 11 seconds, is normally set by the EAC system headend.
- Electric strikes are matched and shall be compatible to the type of locking hardware employed (see Figure 17.5). This may simply be the function of selecting the appropriate faceplate.
Magnetic lock door release devices are required the means of release be mounted within approximately ___ ft of the door at a height between approximately ≈1016 mm (40 in) and ≈1220 mm (48 in) AFF, respectively.
a. 3
b. 4
c. 5
d. 6
c. 5
p 17-16
Codes normally require the means of release be mounted within approximately ≈1.5 m (5 ft) of the door at a height between approximately ≈1016 mm (40 in) and ≈1220 mm (48 in) AFF, respectively.
Mount interior cameras to clear ___ ft AFF while exterior cameras should maintain a minimum of ___.
a. 8, 14
b. 8, 15
c. 9, 14
d. 9, 15
b. 8, 15
p 17-23
Mount interior cameras to clear ≈2.4 m (8 ft) AFF while exterior cameras should maintain a minimum of ≈4.6 m (15 ft). These heights are recommended to prevent intentional and accidental tampering with the camera
Video surveillance matrix switches traditionally are available in multiples of 16 or 32 inputs and outputs.
a. True
b. False
b. False
p 17-24
The traditional product is available in multiples of 8 or 16 inputs and outputs
Within a recording server, the frame rate for any given application is custom to each situation, but a general rule is never to accept less than ___ fps.
a. 3.75
b. 5
c. 7.5
d. 10
a. 3.75
p 17-26
The normal frame rates used are 1 fps, 3.75 fps, 7.5 fps, 15 fps, and 30 fps. The frame rate for any given application is custom to each situation, but a general rule is never to accept less than 3.75 fps.
The traditional video surveillance camera outputs up to 470 lines of resolution; therefore, the ___ CIF is close to the native camera resolution.
a. 2
b. 4
b. 4
p 17-26
The traditional video surveillance camera outputs up to 470 lines of resolution; therefore, the 4CIF is close to the native camera resolution.
The current standard resolutions for National Television System Committee are:
• Common intermediate format (CIF [320 × 240]).
• 2CIF (320 × 480).
• 4CIF (640 × 480).
In an exclusive communication environment, the EAC data is kept on its own physical network that traditionally uses proprietary communication protocol. This method of communication often relies on a ___ topology.
a. Loop or star
b. bus or ring
c. Hierarchical star or dual ring
a. Loop or star
p 17-11
Intrusion alarms are used to initiate countermeasures.
a. True
b. False
b. False
p 17-29
Intrusion alarms do not initiate countermeasures. They simply provide visual, audible, or electronic notification of the problem.
In ESS design, the _____ model, previously known as direct attach, represents a set of scenarios when the cabling link attaches directly to ESS field devices.
a. MUTOA
b. EAC
c. MPTL
c. MPTL
p 17-11
An analog-type electronic access control (EAC) cable consists of _____ individually shielded pairs.
a. Eight
b. Six
c. Four
d. Two
c. Four
p 17-10
EAC systems may be part of a converged network and utilize the structured cabling system for connectivity and power. An analog-type EAC cable consists of four individually shielded pairs
In ESS design, it is commonly accepted that the potential causes for damage or loss can be organized into ___ categories.
a. 3
b. 4
c. 5
d. 6
e. 7
e. 7
p 17-4
- Temperature.
- Gases.
- Liquids.
- Organisms.
- Projectiles.
- Movement.
- Energy anomalies.
To ensure general audibility, in the United States, NFPA 72 require that public mode fire alarm signaling achieves output levels of ___ over maximum ambient sound (dBA) levels.
a. 20 dB
b. 15 dB
c. 10 dB
d. 5 db
d. 5 db
p 17-27
Codes and standards contain extensive rules and guidelines to address these issues. To ensure general audibility in the United States, NFPA 72® requires that public mode signaling achieves output levels of 15 dB over average ambient sound (dBA) levels, or 5 dB over the maximum dBA level having duration of at least 60 seconds in all areas of protected premises.
