Chapter 7 - Non-Fire Building Systems Flashcards
What is the lower explosive limit of anhydrous ammonia
15%.
What are single or multiple strand conductors
Wires
A 3 gauge wire will carry how many amps
100 A
AWG is the smaller the number the ___ the diameter
Larger
What gauge wire is used for lighting circuits in buildings
14-gauge
What are two or more insulated conductors
Cables
What distributes electricity throughout the building
Conductors
What plays a critical role in overcurrent protection
Electrical service panel
Panelboard
What is best to do when operating switches
Use the back side of your hand to move the switch with your face turned away.
What is the most common overcurrent protection for small residential and commercial buildings
Circuit breaker
How many volts do single-family homes operate on
110 volts.
Secondary sources of electricity are required to provide power within how many seconds of a power outage
10 seconds
Standby power systems have how many seconds to pick up the electrical load of these less critical systems
60 seconds
NFPA standard for emergency and standby power systems
110
What are the newest type of power supply
Energy storage systems
NFPA standard for the installation of stationary energy storage systems
NFPA 855
NFPA 855 limits what
Size of battery system arrays requiring 3 ft between each system
What batteries present the possibility of a gas explosion
Lithium
What are the oldest type of building systems
Heating
What do all boilers require
Pressure relief devices
What is the range at which boilers operate between
12 to 30 PSI
What is one of the biggest HVAC issues for firefighters
The ability of smoke to be circulated throughout a building during a fire
How many stories are in a mid-rise building
5 to 7 stories
Laboratories use what type of drains that are resistant to corrosion by acids
Glass
NFPA national fuel gas code
NFPA 54
What are the most important devices on fuel gas piping systems
Control valves
Which direction would indicate the valve is closed on a fuel gas piping system
If the ridge is perpendicular to the direction of the pipe
A17.1 is for what type of elevators
New elevators
A17.3 is for what type of elevators
Existing
What are two type of elevators
Traction and hydraulic
Hydraulic elevators are typically installed in what type of buildings
Low rise. Five or six stories
What is required for each elevator car for shutdown and locked out tag out
Electric power switches
What is phase 3 operation
Occupant evacuation elevators
Occupant evacuation elevators aren’t tended for the self evacuation of occupants in building more than
420 ft in height
Fire service access elevators are found in new buildings more than how high
120 ft
Hydraulic elevator power controls are usually located where
On the first floor
Traction elevator power controls are found where
Top floor
The overall steel frame that supports the escalator is called
Truss
Where is the motor of the escalator located
At the top under the inspection plate
32° F to 65° F
Cooler storage
Eggs and apples
16° F to 35° F
Chill rooms for curing meats.
10° F to 5° F
Freezer or holding rooms for storing frozen foods
35° F to 0° F
Sharp freezer for initial freezing and normal freezing
ASHRAE lower toxicity
A
ASHRAE higher toxicity letter.
B
ASHRAE do not propagate a flame number
1
ASHRAE low flammability number
2
ASHRAE High flammability number
3
ASHRAE flammability is based upon
Flame velocity
Ammonia is classified as B2L which has a max burning velocity
< 10cm/s
Ammonia flammable range
16 to 25%
A permanent water supply capable of providing at least how many gallons of water for each pound of ammonia must be provided
2 gallons
