Ch 3 Flashcards
What roles do stairs provide
Access to upper level
Egress
What stairs do not provide a means of egress
Convenience
How many levels to convenience stairs connect
2
What are the tread and riser commonly referred to as
Rise and Run
Stairs with open sides must include
Hand rails
What are pre fab stairs held together by
Gussets
How many common types of stairs are there
6
What are the common types of stairs
S R R S C F S
What stairs extend in a full run, 1 direction
Straight run
What type of stair is common in modern construction
Return
What stairs have a landing between floors
Return
What stairs have separate sets of stairs
Scissor
What stairs are cheaper and space efficient
Scissor
What stairs use return stairs for the safety of occupants
Scissor
What stairs need more hose to connect to the standpipe
Scissor
How many levels to circular stairs serve
2
What is the minimum width of return for circular stairs
10 in
What stairs are tapered and connect to the column
Spriral
What stairs are used primarily in residential
Spiral
Where are spiral stairs allowed to be part of egress
Residential
What stairs provide access to attic space
Folding
What stairs are commonly found in hotels and multi story buildings
Exit
What stairs are naturally ventilated on 1 or more sides
Exterior
What consists of a swinging stair to limit access
Fire escape
When are smoke proof stair enclosures required
5 stories or higher
What types of smoke control do smoke proof stairs use
Active
Passive
Where are smoke proof stair enclosures accessed from
Vestibule
Where are smoke proof stair enclosures typically located
Exterior perimeter
Which type of conveyors are in enclosed compartments
Screw
Pneumatic
How are conveyor systems protected
Fire doors
Shutters
Water system
What is the standard escalator speed
100ft per min
What speed do older escalator operate at
90
120 ft per min
What is the common protection for vertical openings
Sprinklers
Draft Stops
Where are moving walkways found
Airports
How many levels do elevators serve
2 or more
What are elevator regulations based on
ANSI 17.1
What are the classifications of elevators
Passenger
Freight
Service
What type of elevators do not have brakes
Hydraulic
What are the 2 common types of power used in elevators
Electric
Hydraulic
What is the practical floor limit of hydraulic elevators
6 stories
What are the 4 types of elevators
Drum
Traction
MRL
Dumbwaiter
What are dumb waiters intended for
Cargo
What are MRL elevators intended for
Passengers
Which elevator is most common in buildings over 6 stories
Traction
Where is the drive equipment located for a traction elevator
Machine room over hoistway
What do traction elevators use to reduce energy to raise the elevator
Counterweights
Operating heights may require the use of how many volts
500
What motors directly aide in stopping the car
AC
What elevator motor do brakes not stop the car
DC
What are the most common types of power used for elevators
Electric
Hydraulic
Which elevators have controls that are remotely located
MRL
In low rise buildings, what do hoistways consist of
Gypsum
In tall buildings, what are hoistways poured with
Concrete
How long are hoistways fire rated for
1-2 hrs
What walls do elevator shafts and stair shifts use
Shear walls
What acts as a vertical chimney to spread fire
Hoistways
How many hoistways do 4 or more elevators require
2
How many floors does a zone include
15-20
What hoistways are used for elevators that serve upper zones
Blind
Where are access floors placed
Every 3 floors
What will not allow the car to move if the doors are open
Electric interlocks
Electric interlocks are not required on what elevators
Freight
Electric interlocks are required on what exit
Side
Where are elevator keys secure
Lock box
Which openings do not include horizontal fire boundaries
Vertical
Refuse chute is required to be made of
Noncombustable material
Where are sprinklers required for a chute
Top
Termination room
What is the primary purpose of HVAC
Create a comfortable environment
What allows airflow through a building for ventilation
Cupolas
Duct detectors are provided when exceeding how many square feet
2000
What fuels are used in heating
Natural Gas
Oil
What hazards are associated with cooling equipment
Refrigerate
Electricity
What is the distribution component of HVAC
Ducts
What NFPA provides requirements of ducts
90A
What are the 2 fire ratings for HVAC duct
1 hr for less than 4 stories
2 hr for more than 4 stories
What 2 ways are smoke control mode activated
Automatic
Manual
What is the primary advantage of automatic smoke control system
Fast activation
What mode is used to prevent the recirculation of smoke
Smoke control
What is the primary disadvantage of an automatic smoke control system
Number of elements to coordinate
What operating mode takes priority over automatic
Manual
What is the disadvantage of manual operation
Slow activation
What is the minimum feet smoke and heat vents open
4
What increases smoke vent effectiveness
Draft curtains
What is the depth size of smoke curtains
20% of ceiling height
What NFPA determines the required vent area
204
What is of maximum value for removing products of combustion in sprinklered buildings
Roof vents
What protects stairways from products of combustion
Pressurized stairwell
What system provides a more uniform flow into the stairwell
Multi injection
What system allows for airflow adjustment into stairwell
Compensated
What is high voltage defined as
600 volts or higher
What are the 2 most common methods for cooling transformers
Air
Oil
Air cooled transformers are known as
Dry
Where are dry transformers designed for use in
Sprinklered rooms
What is the fire rating for transformers protected by sprinklers
1 hr
How many gallons is the day tank limited to
60
What is the fire rating for transformers not protected by sprinklers
3 hr
How far are draft curtains placed apart
Not more than 8 times the ceiling height
What type of elevator is the top exit optional
Hydraulic
When is a top exit provided on a hydraulic elevator
If the system has a manual lowering valve
Top panels are not required on what elevators
Freight
What is a special requirement for circular stairs
Small radius is equal to or greater than twice the widest part of the stair tread
What is the primary safety hazard at conveyor penetration
Incomplete door or shutter closure
How deep is the draft stop
18 in
How are hydraulic elevators controlled
Hydraulic fluid
What is the most common elevator in buildings over 6 stories
Traction
What are elevator safeties designed to do
Stop a free falling car
What elevators do not have car door locks
Passenger elevator
How are metal lid vents opened
Manually
Fusible link
Detectors
Where are smoke towers located
Periphery of the floor plan
What is a limitation of a single injection system
All of the air pressure can flow out of the stairwell
What system negates the primary limitation of the single injection system
Multipoint system
What does low voltage equipment operate at
Less than 600 volts
What do dry transformers step the voltage down to
120
What is required for transformers containing PCB
A label
Where are scissor stairs found
Airports
Malls
Convention
Cinema
Where is the electric motor for passenger elevators located
On top of the car
How are metal vents operated
By spring
What stairs have a landing between floors
Return
What are folding stairs held in place by
Coil/gas spring
Counter weights
What is provided at the top of the escalator to provide vertical opening protection
Rolling shutter
