Chapter 17 - Electronic Safety and Security

Question 1

What are the potential causes for damage or loss?

Answer 1

• Temperature
• Gases
• Liquids
• Organisms
• Projectiles
• Movement
• Energy anomalies

Question 2

What are the three levels of a Electronic Access Control (EAC) system?

Answer 2

Level 1 - Headend processing, recording, software, or database
Level 2 - Intelligent field processing (eg data gathering panel)
Level 3 - Field devices (eg card reader, lock, door position switch)

Question 3

What are four different types of basic locks?

Answer 3

Bored locks: Mounted by boring a hole through the door.
Rim Locks: Mounted to the surface of the door and latched to a surface mounted strike
Mortise Locks: Embedded (eg mortised) into the door and latched to a strike cut into the center of the door frame
Vertical rod locks: Use vertical rod that latches to the top or bottom of the door

Question 4

What is an entrance lock?

Answer 4

Entrance lock can be locked from inside and use a key to unlock.

Question 5

What is a storeroom lock?

Answer 5

A storeroom lock is always locked and requires a key to open.

Question 6

What is a classroom lock?

Answer 6

Classroom lock has access to door via key, and needs to be locked and unlocked via key.

Question 7

What is vestibule lock?

Answer 7

Vestibule lock uses a key on the inside to lock and unlock, as well as an outside key to access.

Question 8

True or false.

Magnetic locks are fail-safe and may be used as the only hardware on fire doors?

Answer 8

False. They may not be used as the only hardware on fire doors as latching is necessary.

Question 9

True or False
Magnetic locks are fail-safe and doors are unlocked in the event of a power failure, allowing a potential security breach.

Answer 9

True

Question 10

What are the three types of camera lens?

Answer 10

Fixed lens
Variable lens
Zoom lens

Question 11

What height should interior and exterior cameras be mounted at?

Answer 11

Interior: ~2.4mm (8ft) AFF
Exterior: minimum ~4.6m (15ft)

Question 12

What is the difference between single action and double action pull stations?

Answer 12

Single action requires only one action to initiate alarm, while double action requires two (e.g. lifting a cover, and pulling the lever)

Question 13

What does FA NAC stand for?

Answer 13

Fire Alarm Notification Appliance Circuit
- used to connect and operate notification appliances, and are low-voltage circuits that can originate from either the FACP or a distributed or stand-alone power supply

Question 14

What is the required output level for general audibility for fire alarms according to NFPA 72?

Answer 14

• Public mode signaling at an output level of 15dB over average ambient sound levels
• or 5dB over the max dBA level having a duration of at least 60 seconds in all areas of protected premises

Question 15

For fire alarm systems, what is a Class A circuit?

Answer 15

Class A circuit includes a redundant signal pathway. A single ground fault will not affect operations, but will annunciate a trouble signal.
Commonly used for notification and signaling line circuits

Question 16

For fire alarm systems, what is a Class B circuit?

Answer 16

Class B circuits do not have a redundant signal pathway.

Commonly used for notification and signaling line circuits.

Question 17

For fire alarm systems, what is a Class C circuit?

Answer 17

Class C circuits include one or more circuits and operational capability is verified via end to end communication. A loss of end to end communication will result in trouble signal.
Commonly used for addressable devices and appliances. (device talks back to brains of FA system, the FACP)

Question 18

For fire alarm systems, what is a Class D circuit?

Answer 18

Class D circuits have fail-safe operation, where no fault is annunciated but circuit does the intended action if power is loss.
(Ex: power going to a magnetic door holder, if power is loss doors close)

Question 19

For fire alarm systems, what is a Class E circuit?

Answer 19

Class E circuits are not monitored.

Normally used for supplementary equipment only

Question 20

For fire alarm systems, what is a Class X circuit?

Answer 20

Class X circuits are essentially class A circuits with short circuit protection.
Typically used for signaling line circuits

Question 21

What is a Class N circuit?

Answer 21

Class N pathway is for Ethernet and other network protocols.

Question 22

What are the difference between levels 0-4 of a class N pathway?

Answer 22

Level 0 - Does not segregate or prioritize life safety data from non-life safety data
Level 1 - life safety data is not segregated, but is prioritized over non-life safety data
Level 2- life safety data is segregated from all non-life safety data
Level 3 - dedicated equipment for life safety systems

Question 23

What are the four requirements in NFPA 72 for a Class N system to do when operating below normal criteria?

Answer 23

• Send a supervisory signal to the fire alarm panel
• Record information in the history log
• Notify premise owners of the problem
• Identify the location of the problem

Question 24

True or False
The AHJ does not require two independent, reliable sources of power for each central control panel in a fire alarm system.

Answer 24

False

Question 25

True or False
Remote Control panels are referred to as Notification Appliance Circuit (NAC) panels if used solely as power supplies for alarm-indicating devices.

Answer 25

True.
Remote control panels are often installed when single power supply within the central control panel is not sufficient to service all the FA devices in the system.
They can also contain functional logic as the central control panel, or just be secondary units.

Question 26

A digital alarm communicator transmitter (DACT) tries to make a phone call, while blocking other outgoing and incoming calls. How many attempts can the DACT make and what is the time each attempt may not exceed?

Answer 26

Each attempt may not exceed 90 seconds.
Can make a minimum of 5 and max of 10 additional attempts until a connection is made and the signal is transmitted before a failure notification is made at the FACP.