Chapter 4 Flashcards
Which location of the HVAC mechanical room allows for
easier intake of makeup air?
On the top Floor
What is activated if the speed-reducing switch fails to
slow the car sufficiently?
Overspeed switch
Which can form pathways for fire and smoke in the walls of
one- and two-story residential buildings because they are
not required to be installed in a rated chase?
Plumbing pipes
Where is a moving walkway generally found?
Airports
Which are designed to stop a free-falling elevator car?
Car safeties
What material is usually used to construct folding stairs?
Wood
What is generally the maximum number of floors that
convenience stairs are allowed to connect above the
basement level?
Two
How many smoke proof stair enclosures have building codes
traditionally required as a minimum for stairs serving
buildings five stories or higher?
One
What does the hydronic system rely upon as a heat transfer
medium?
Water
What allows for HVAC system efficiency?
Re-circulating interior air
What is the required fire-rated construction for
transformer rooms inside a building when a sprinkler
system is in place?
1-hour
Which zones must be coordinated in order to maximize the benefits of a smoke control system
Fire alarm, automatic sprinkler and HVAC
How many stairways are required to extend to the roof in buildings of four or more stories in height
one
How many openings will there be along the refuse chute in a five story building with a basement landing
six
Which type of occupancy could be required to store 48 hours or more of fuel for a generator
hospital.
During which stage may roof vents in a sprinklered building be a maximum value in removing products of combustion?
Overhaul
Up to what number of elevators may be located in each hoist way when more than one hoist way is in place?
Four
Which is an electrical switch designed to stop the car by removing power before it reaches the upper or lower limits of the hoistway
Terminal device
Which of the following is commonly found in manufacturing or storage occupancies and is used to transport items and materials?
Conveyor system
What os the maximum number of elevators allowed before a second hoist way will be required
Three
Which NFPA standard contains requirements for protection when HVAC ducts penetrate a fire-rated assembly
90A
Which type of penetration is not allowed in a protected stairway
Interior plumbing
What is the vertical distance between the treads of a stairway or the height of the entire stairway
Rise
Which type of stairs uses two separate sets of stairs in one common shaft?
Scissor
Which of the following is considered a disadvantage to the annual operation of the smoke control system
It is slower than automatic operation
What is the breaking point between high and low voltage equipment?
600 volts
what direction do all top panels open in elevator cars
outward
What depth should the draft stop be when protection an escalator that services more than two floors
18 inch
What is generally provided for fans with capacities exceeding 2000 cubic feet per minute
Duct detectors
What should be done if a moving escalator is encountered during emergency operations
turn it off
Where is the car door motor located on passenger elevators
Top of the car
Who is responsible for controlling and monitoring elevator design construction and operation?
Government
Which type of stairs extend in a straight line for their entire length?
straight-run
Where must elevator hoist ways be vented today to prevent mushrooming
Top
What fire rating are elevator hoist ways usually required to have
1- to-2 hour
What does the traction elevator use to reduce the amount of energy needed to raise the elevator
Counterweight
What is the minimum number of sides of the exterior stairway that will be open to provide natural ventilation?
One
Which type of stairway should firefighters use with extreme caution due to their inherent instability
Fire escapes
What was the maximum number of stories that a hydraulic elevator could service in the past
six
Where is the drive equipment for the traction elevator generally located
Machine room in the hoistway
What are used to convert high voltage electricity to an appropriate voltage for use in the building?
Transformers
Which type of battery is most often used for emergency power supplies that require batteries
Lead-acid
Which is the most common engine type used in a generator
diesel
What was used in the early forced-air systems to cool and ventilate a building
Openable windows
What is the standard speed of escalators today
100 fpm (30.4 m/min)
How is the air supply shaft oriented in relations to the pressurized stairwell;; when a multiple injection system is being used
parallel
Which type of stair design allows stairs to be placed in a very small space?
Spiral
What means is used to access a passive smoke proof enclosure
exterior balcony
How many levels are convenience stairs usually restricted to connecting under building code
two
What is the most common type of elevator found in buildings over six stories in height?
Traction
What is used to inhibit smoke movement in the smile control system
mechanical fans
Which term is used to describe an elevator that has been designed to carry passengers and freight
Service
Which is a concealed vertical channel in which utility conduits are housed
Pipe chase
Where are sprinklers required to be located in a refuse or laundry chute
At the top and in the termination room
What is the minimum width of the run allowed on a circular stairway
10 inches
Which type of system adjusts the airflow into the pressurized stairwell depending on the number of doors that have been opened
compensated
What is the minimum pressure difference that NFPA 92A requires in the pressurized stairwell
0.0018 pounds per square inch(12.5 Pa)
Where must elevator hoist ways be vented today to prevent mushrooming
Top
Which NFPA standard contains requirements for protection when HVAc ducts penetrate a fire rated assembly
90A
What lowers an elevator that is hydraulically powered
Gravity
At what interval are access doors usually placed in a blind hoist way below the lowest level served
Every three floors
What is used for overpressure relief in a stairwell
Dampers
What can be used to automatically switch the HVAC system to fire operation
Smoke detectors
What is the most common type of elevator found in buildings over six stories in height
Traction
Which should not be used to activate the smoke control system
Manual pull stations on building fire alarm system
When do the brakes on a traction elevator with AC motors function during normal operations
aid directly in stopping the car
What is used to keep smoke out of the stairway with an active smoke proof enclosure
pressure
What is the minimum percentage of the ceiling height that should be used for the depth of the curtain board
20 percent
What is typically the maximum amount of diesel fuel allowed to be stored in the day tank
60 gallons
What direction does the ductwork of a grease duct most often travel
Vertical
Which type of system adjusts the airflow into the pressurized stairwell depending on the number of doors that have been opened
compensated
What is activated if the speed reducing switch fails to slow the car sufficiently
Overspeed switch
