*Bk 29- Elevator Rescue Flashcards
What are the two types of cable elevators?
Drum and traction
Limitations in the length and diameter of the drum type elevator restricts the elevator to ________ ft lifts and slow speeds
150
Hydraulic elevators are generally limited to lifts up to how many stories?
6 stories
One of the locations an equipment room for a hydraulic elevator can be found is ____ to ____ feet away from the elevator shaft
50-100
The 4 types of elevator doors are?
- Swing hall
- Single slide
- Two speed
- Center opening
In elevators, what contacts the rollers on the hoistway door which releases the door latch on the hoistway door?
Pickup arm
What are gib blocks made out of?
Plastic or phenolic materials
What are the dimensions of a gib block? (Width, height, thickness)
3” wide by 1” high by 1/2” thick
How far apart are gib blocks placed?
Every 18” across the bottom
Normal hoistway doors can be expected to utilize how many gib blocks?
2
As a safety device, a centrifugal force governor will activate when an elevator travels in excess of ____ % of top speed
20%
During elevator rescues, what two areas need to have personnel equipped with portable radios?
- Elevator equipment room
2. Floor where elevator is inoperable
Do not rescue passengers using forcible entry methods unless?
Immediate medical attention is needed
When resetting an elevator, how long should you leave the power off before switching it on again?
30 seconds
Do not attempt to rescue trapped passengers from an inoperative
elevator until what has been done?
Power is switched off
On hydraulic elevators and some cable elevators, the hoistway doors will open once the elevator is within how many inches of floor level?
6”
On cable elevators, the hoistway doors will open once the elevator is within how many inches of floor level?
18”
When lowering a hydraulic elevator, open the bleeder valve slowly until?
You hear the sound of fluid moving
When trying to move an inoperable cable elevator, it is generally easier to move the car _______ (up or down)? because of counterweights.
Upward
Elevator side emergency exits are a minimum of what dimensions?
16” wide by 5 feet high
Elevators of more sophisticated design have access panels for blind floors. Where would you find these panels?
Every 3 floors or 80ft apart
After how many consecutive floors in an elevator shaft without the presence of hoistway doors is considered to be a blind section?
3 floors
_________ smoothly decelerate an elevator car and supports it at rest as it passes the lowest floor landing.
Buffers
On an elevator, what locks the hoistway doors in a closed position?
Interlock or door latch-lock
What is an express elevator?
An elevator car that has no hoistway doors to access three or more consecutive floors.
The pick-up arm clutch (vane, cam or bayonet) is how long on hydraulic elevators?
14”
The pick-up arm clutch (vane, cam or bayonet) is how long on cable elevators?
36”
The area at the bottom of an elevator shaft is known as?
Pit area
An elevator car is not in use is known as?
Parked car or sleeping elevator
Freight Elevators:
Larger than passenger elevators, freight elevators can be as large as ____ by ____ feet and have a carrying capacity of up to ___ tons.
- 12x14 ft
* 3 tons
What can be used to cut gib blocks?
Plumbers saw, hacksaw, reciprocating saw, air chisel, etc.
(When the gib blocks are cut, the hoistway door can dislodge from its upper track if it is pushed too far into the shaft)
In traction type elevators, cables are attached to the car and pass over a traction _____ to counterweights and car speed is dependent on the size of the traction _____ and the electric motor speed.
Sheave and sheave
In a traction type elevator, what are the two types of traction equipment?
- High speed direct traction / gearless type traction (slow speed DC motor)
- Geared traction type (high speed motor)
The equipment room for drum type elevator may be located where?
basement (rare) or on the roof of a building
The equipment room for traction type elevator may be located where?
On Roof or above an elevator shaft in high rise buildings
- The door on the elevator car is referred to as the ____ or ____ door and travels with the elevator car.
- The door that is seen from each floor of a building is referred to as the ____ or ____ door
- inner or car door
* outer or hoistway door
When an elevator car is level with a floor landing, the _____ moves the car door open or closed.
Power unit (mounted on top of the elevator car)
The power unit opens the car door which in turn opens the hoistway door.
What are the four types of elevator rescue procedures?
Which is the most dangerous and should be considered last resort?
- Moving an Elevator
- Adjacent Car Rescues (most dangerous / last resort)
- Forcing Doors
- Breaching Elevator Shafts
If an elevator is equipped with a recall system, can it be used to assist with the rescue of trapped occupants?
Yes, a key can be used to recall the elevator to the ground floor and open its doors. If the elevator returns to the ground floor but does not open its doors, instruct the passengers to push the Door Open Button (if so equipped).
Cable elevators:
How many members should proceed to the equipment room? What equipment should they bring at a minimum?
2 members
- 2 claw tools
- pipe wrench or large channel locks
When releasing the brake on a cable elevator, place the claw tools between brake _____ and the ____, one on either side of the brake.
Caliper and spring
Where on an elevator door should you place an airbag when trying to force the doors open?
What size airbag should you use? Small or large?
Near the top
Small
When would removing the gib blocks not be a viable option for an elevator rescue?
the inoperative elevator is located at the top floor of a building
Escalators:
For most modern escalators, shutting off the power allows the treads to be moved backwards by ____ pressure.
Hand pressure
Some older installations may require the use of a crowbar or other similar tool to push the treads backwards.
What button/switch inside an elevator car disables the photo electric light beam allowing the car doors to close when smoke from a fire keeps the doors from closing?
Emergency switch labeled : PUSH IN CASE OF FIRE
What does the emergency stop switch inside an elevator car do?
Manually shuts off electrical power to the elevator
Escalators:
An escalator cannot be restarted without the use of a key-operated switch located where?
A covered compartment at the bottom of the escalator
Hydraulic elevator:
The bleeder valves are located on the hydraulic power unit in the equipment room. There are generally how many valves in this unit?
3
One to lower
One to raise
One to level the car to the floor landing
Hydraulic elevators:
Most bleeder valves located on the power unit have a manual lowering screw built into the valve and are marked in what three ways near the lowering screw?
ML, MAN, or MANUAL
What are the two types of elevators?
Cable and hydraulic
