Elevator Rescue (ch4.) Flashcards
There are numerous ( over ___) elevator manufacturers
60
Currently there are two types of elevators:
Cable operated(electric elevator)
Hydraulic operated
Two types of cable elevator
Drum type and traction type
Limitations in the length and diameter of the winding drum restricts this type of elevator to ____ foot lifts and slow speeds
150ft
Similar in general design to the cable elevator, hydraulic elevators use hydraulic power instead of cables and traction sheaves and are generally limited to ____story buildings
Six
The equipment rooms for hydraulic elevators are normally located at the lower level of a building, but can be at any floor level or ___ to ____feet away from the elevator shaft
50 to 100ft
Larger than passenger elevators, freight elevators can be as large as ___feet by ____feet and have a carrying capacity of up to ___ tons.
12x14 ; 3 tons
4 basic types of doors used on elevator
Swing hall
Single slide
Center opening
Two speed
Gib blocks are approximately ___ “ wide ___ “ high, ___ “ thick
And are installed every ___ in
3 in wide
1in high
1/2 in thick
18 spacing
Normal hoistway doorscan be expected to utilize ___ gib blocks
2
A centrifugal force governor is provided on most elevators to guard against overspeeding (when a car travels in excess of _____% of top speed, the governor will activate a safety stop device
20%
Elevator rescue procedures include ; x4
Moving elevator
Adjacent car rescue
Forcing door
Breaching elevator shafts
turn the power off for at least ____seconds and then back on again. This can reactivate the elevator by allowing relays to reset (at least ____seconds is necessary to clear any previous programming in the elevator computer)
30
On hydraulic elevators and some cable elevators, the hoistway doors will open if the
elevator is either ____inches above or below the floor level.
On cable some elevators, the hoistway doors will open if the elevator is either _____in above or below the floor level.
6in = hydraulic
18in = cable
There are generally ___ valves on hydraulic power unit.
Lowering screw are marked ____, ____, or _____
3 valves
ML, MAN, MANUAL
Hydraulic elevator
When the car is level or within ____inches of the floor landing, discontinue bleeding the
hydraulic fluid by rotating the valve clockwise until the valve is seated.
6in
Cable elevators;
2 members to equipment room should have ____ and a ____ (or____)
2 claw tools and pipe wrench (or large channel locks)
Side emergency exits are at least ____ in wide and ___ ft height
16in wide and … 5 Ft high
Elevators
of more sophisticated design have access panels from blind floors. These panels may be
every three floors or ____feet apart.
80ft
Blind Section The part of an elevator shaft that for ____or more consecutive floors has no hoistway doors to access the floors.
3
Speed govenorenter is a mechanical or hydraulic device
Mechanical
Elevators =
90- 120ft per min
