Chapter 4 Elevator Extrication Flashcards
What are the two types of elevators?
Electric and hydraulic
Where should the equipment room be located for a hydraulic elevator?
Basement or lowest level of a building
What two types of doors are present on modern elevators?
Cab door and hoistway door
Generally, fire service controls are required on elevators constructed after what year?
1973
If the lobby key is activated in Phase 2 mode and turned to bypass, what should happen?
The bypass mode should override the control of any smoke or heat detectors and return the elevators to normal operation.
Freight elevators will normally service what floors of a building?
The entire building
If an elevator is inoperative, where should rescue personnel be positioned?
In the elevator equipment room and on the floor where the inoperative elevator is located
Elevator electrical relays can often be reset by turning the power off for at least how long?
30 seconds
What tool facilitates using a hoistway access opening to deactivate the locking mechanism, allowing the hoistway and cab doors to be opened?
Lunar key
Depending on the manufacturer and type of elevator, opening the hoistway doors can be simplified if the cab is positioned in what specific location?
The door lock zone, which is commonly defined as being a few inches above the landing
What components does a typical electric elevator consist of?
Hoistway Car Cables Counterweights Vertical tracks Emergency Safety brakes Electrical equipment
What are the two types of electrical elevators?
Drum-type
Traction-type
What type of electric elevator is used for higher lifts and greater speeds?
Traction-type
Where is the elevator equipment room located for traction-type elevators?
Roof penthouse of above the elevator shaft
What are the limitations to a drum-type elevator?
Limitations in the length and diameter of the winding drum restrict this type of elevator to 150-foot lifts and slow speeds
What are the two main components found in the machine room of a hydraulic elevator?
Contol panel or relay panel
Hydraulic power unit
What are the 4 basic type doors used on elevators?
- Center-opening
- Two-speed
- Single slide
- Swing-hall
A centrifugal force governor is provided on most elevators to guard against overspeeding when a car travels in excess of ____above top speed.
20 percent
What is phase 1 mode on an elevator control?
Firefighters key inserted into lobby and turned to on.
Recalls elevator non-stop to lobby
Elevator will remain there as long as switch in on position
Key can be removed and used inside elevator (phase 2)
How big can a freight elevator be?
12 x 14 feet with carrying capacity of up to 3 tons
How do you move hydraulic elevators?
Cut power
Locate (lowering) bleeder valve (nside hydraulic power unit) and open slowly.
How do you move a electric elevator?
Release tension on friction brake using pry tool
Rotate elevator shaft with pipe wrench or channel locks
Is it generally easier to manually move a electric elevator car up or down?
Upwards
What are gib blocks?
located on the bottom of the hoistway doors every 18 inches to provide stability to the hoistway doors as they open and close
When should adjacent car elevator rescues be performed?
Last resort
How big are emergency side exits on elevator shafts that are equipped with them?
Usually 16” wide x 5’ tall
What is a blind or express hoistway
any enclosed shaft of 3 or more floors
What is the principal hazard of any fire in an elevator hoistway?
Smoke
What is the voltage of the main line on elevators
Range from 240-680 volts
