Elevators - Book 29

personnel in the equipment room should turn the power off in the elevator for at least _______ and then back on again. This can reactivate the elevator by allowing relays to reset.

30 seconds

hydraulic elevators are generally limited to buildings ____ stories in height

6

when there is an inoperative elevator with trapped occupants, where should personnel be positioned?

1. Elevator equipment room 2. floor where elevator is inoperable

For elevator rescues, what are the six minimum considerations?

1. Is there an inoperative elevator? 2. Trapped Occupants and their conditions? 3. Elevator repair person notified and ETA? 4. Location of elevator? B/t floors or at landing? 5. Type of elevator? hydraulic or cable? 6. where is the elevator equipment room?

What are the four types of elevator rescue?

1. moving an elevator 2. adjacent car rescues 3. forcing doors 4. breaching elevator shafts

freight elevators can be as large as _______ feet and have a carrying capacity of up to ______ tons

12 x 14 feet; three tons

side emergency exits are usually at least _____ inches wide and ______ feet high, located so there is free access to the side exit of an adjacent car, will open ______ and are either hinged or removable.

16 inches x 5 feet; inward

Elevators are provided with brakes for normal operation and are similar to automotive brakes. 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

What are the two types of elevators?

Cable Operated and Hydraulic Operated

a winding drum elevator consists of a car attached to one or more cable that pass around a winding drum and to a moving counterweight. The drum is grooved for cable movement. The equipment room for drum type may be located in _________ or ________. Limitations in the length and diameter of the winding drum restricts this type of elevator to _________ lifts and slow speeds.

a basement or the roof of the building; 150 foot

To lower a hydraulic elevator you will need to de-energize all electrical power to the inoperative elevator. Direct the passengers to move to the rear of the car and keep the car door closed. Next, locate the ________ located on the hydraulic power unit in the equipment room.

bleeder valve

________ elevator doors consist of two power operated panels that part simultaneously with a brisk, noiseless motion

center opening

elevators are provided with brakes for normal operation and are similar to automotive brakes. A ____________ is provided on most elevators to activate a safety stop device to guard against overspeeding or when a car travels in excess of _____ percent of top speed.

centrifugal force governor; 20 percent

Hydraulic elevator equipment rooms contain the following main components: __________ which provide the necessary electronics to run the elevator and a __________ which consists of a reservoir for the oil supply, hydraulic pump and valves to raise and lower the elevator car

controller/relay panel; hydraulic power unit

the main source of fuel in an elevator shaft fire is _________. The principal hazard of any fire in an elevator shaft is the smoke created by the fire and its extension to an elevator car with passengers, equipment room and other level of the building.

debris in the pit

when a fire occurs in an elevator equipment room, the probable seat of the fire will be the _________. disconnecting the main and auxiliary power switches will stop car movement and de-energize the driving motor.

driving motor

Cable elevators have are either a _____ type or a ______ type.

drum; traction

On cable elevators, the hoistway doors will open if the elevator is either _____ inches above or below floor level.

eighteen inches

General guidlines for rescues: Determine if trapped passengers are in need of medical assistance. inform passengers they are safe and keep them informed of operations. have the trapped passengers verify the status of the _________ b/c if an elevator is stalled due to a malfunction, it is necessary for this button to be activated before power will be returned to an inoperative elevator. instruct passengers to push the _________ button if equipped. Lastly, if the elevator car is withing a few inches of the landing floor and the power is off in the equipment room, instruct passengers to try and manually open the car door.

emergency stop button; door open button

The two types of traction equipment are a _______ type traction that consists of a slow speed DC motor and a ______ type that uses a high motor

gearless; geared

the bottom of hoistway doors are equipped with _________ that ride in tracks on the floor landing and provide stability to the door as it opens and closes. They are 3" wide, 1" high and 1/2" thick and installed every _____ inches.

gib blocks; 18 inches

Modern elevators use two sets of doors for operation and passenger ingress and egress. The door on the elevator car referred to as the ________ door. The door that is seen from each floor of a building is referred to as the _______ door.

inner/car; outer/hoistway

Equipment rooms for hydraulic elevators are normally located at the ______ of a buildings, but can be at any floor level or ______ feet away from the elevator shaft

lower level; 50 to 100 feet

Most bleeder valves have a _________ built into the valve and are marked ML, MAN, or MANUAL.

manual lowering screw

Equipment rooms for traction type elevators are usually found ____________.

on the roof or above an elevator shaft

________ elevator doors are power operated single panel doors

single slide

On hydraulic elevators and some cable elevators, the hoistway doors will open if the elevator is either ______ inches above or below the floor level.

six inches

Open the bleeder valve slowly, just enough to hear the sound of fluid flowing, and the elevator car will slowly lower. When the car is level or within _____ inches of the floor landing, discontinue bleeding the hydraulic fluid by rotating the valve ______ until the valve is seated. This will stop the car

six; clockwise

________ elevator doors consists of a hoist way door that is manually opened and a single slide car door that is power operated or a collapsible gate

swing hall

elevator doors are normally opened by a power unit that is located on top of the elevator car. when an elevator car is level with ________, the power unit moves the car door open or closed. A _______ contacts rollers on the hoist way door which releases the door latch on the hoistway door. The power unit opens the car door which in turn opens the hoistway door.

the floor landing; pick up arm

There are generally how many valves located on the power unit?

three valves -- one to raise the car, one to lower the car and one that will level the car to a floor landing

Traction elevators are used for higher lifts and greater speeds than drum elevators and use a ________ instead of a winding drum. In the configuration of cables attached to a car and passing over a traction sheave to counterweights, the cables passing over the traction sheave unwind as fast as they wind and car speed is dependent on the _________ and the _________.

traction sheave; size of the traction sheave and the electric motor speed

________ elevator doors consist of two power operated panels that are geared together. One door moves twice as fast as the other door so that both doors will meet concurrently in the open position.

two speed