Quiz 2- Commercial Wiring - Unit 6 Flashcards
An ancillary device is a device from another protection system that is actuated by the fire alarm system.
True False
An annunciator is a device used for
Audio alerts
Visual display
Both A and B
‘Class A’ circuits requires no end-of-line resistor, and ‘Class B’ circuits require and end-of-line resistor
True
False
Electrical supervision means,
The circuit is monitored and a fault will cause normal operation
The circuit is not monitored and a fault will cause the circuit to respond
The circuit is monitored and a fault will interfere with normal operation
Heat and Smoke detectors aren’t a form of fire detector.
True
False
Trouble signals have,
A signal for sight and sound
A signal for audio only
A signal for visual only
An Alarm signal has,
Audible and visual signals
Audible signal
Visual signal
Both B and C
Single-stage fire alarm systems will
Cause a trouble signal to sound immediately on all audible alarm devices
Cause an alarm signal to sound immediately on all visual devices
Cause an alarm signal to sound immediately on all audible alarm devices
Two-stage fire alarm systems will
Initiate an alert signal, followed by an alarm signal if not acknowledged within five minutes
Initiate an alert signal, followed by a trouble signal if not acknowledged within five minutes
Both A and B
The four main stages of a fire are….incipient, smouldering, flame, heat
True
False
Most fatalities are caused from inhalation of smoke and toxic gases rather than from burns.
True
False
With fire alarm systems the primary purpose is to ________ and the secondary purpose is to ________,
Protect property, protect lives
Protect lives, protect property
Protect firefighters, protect first responders
Some types of occupancies that require fire alarm systems are
Buildings with more than 300 occupants
Buildings with more than three storeys which includes basements or levels below grade
Buildings with contained use areas such as jails or mental health centers
A school, college or daycare with 40 or more occupants
A building of residential occupancy with sleeping accommodation of more than 10 occupants
All of the above
Major occupancies have six main categories known as, Assembly, Institutional, Residential, Business, Mercantile, and Industrial.
True
False
Classification of major occupancies have groups A,B,C,D,E, and F, these groups also have Divisions which give more description to the groups.
True
False
There is no description indicated
According to Figure 6-5 ceiling and/or wall-mounted smoke or heat detectors should never be placed within 150mm (6 inches) from the corner connecting a wall and ceiling.
True
False
What types of building systems protect occupants and structures from fire?
Suppression
Detection
Active
Passive
Anunciating
All of the above
Only A,B,D
Passive systems can include fire walls, fire resistance ratings, and smoke control.
True
False
Detection/signalling systems are designed to detect a fire but not warn the occupants of any potential hazard.
True
False
Diluting, cooling, smothering, and inhibiting chain reaction are parts of a
Passive system
Suppression system
Detection system
Signalling system
In Figure 6-6, the fire alarm system has an end-of-line resistor. This type of system is known as
Class A
Class B
Photoelectric type smoke detectors have a light sensor that measures the amount of light in a chamber. When smoke is present, light is reflected off the smoke which triggers the alarm.
True
False
Ionization type detectors are designed in such a way that when smoke enters a chamber, it impedes the movement of ions, reducing current flow, which causes an alarm.
True
False
Rate-of-rise heat detectors sense
A rapid change in smoke temperature
A rapid change temperature over a period of time
A rapid change in smoke over time
All of the above
What type of fire alarm system circuit represents 80% to 90% of all installed systems?
Class B
Figure 6-14 indicates that a Class A system is a 2-wire, and a Class B system is a 4-wire.
True
False
What CEC section covers the installation requirements for fire alarm system
Section 18
Section 46
Section 32
Fire pumps require no overload or overheating protection.
True 32-310
False 32-310
Depends on the condition and overcurrent protection.
