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Firefighters And Highrises > Chapter 4 - Elevators > Flashcards

Chapter 4 - Elevators Flashcards

1
Q

What are the two basic types of elevators?

A

Hydraulic and traction

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2
Q

How are elevators differentiated?

A

The manner in which they are lifted and lowered through their shafts.

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3
Q

How are hydraulic elevators lifted?

A

On a piston which travels within a cylinder and is driven by hydraulic fluid.

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4
Q

What does the length of the piston determine?

A

How high the elevator can be lifted.

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5
Q

Hydraulic elevator service is normally limited to how many stories?

A

Five or six stories.

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6
Q

Traction elevators have multiple what?

A

Wire hoisting ropes.

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7
Q

What is the primary purpose of the extra ropes?

A

To increase traction on the sheave.

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8
Q

Where are hoisting motors and traction sheaves located?

A

Elevator machine room.

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9
Q

Where are traction elevator machine rooms located?

A

Typically one or two floors above the top floor served by the car.

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10
Q

What are the two levels of elevator machine rooms used for on older elevators?

A

One for hoisting motors and one for motor generators.

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11
Q

All elevators have identifying numbers located where?

A

Inside the elevator cabs.

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12
Q

What is located in the elevator machine room?

A

The controller.

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13
Q

How many electrical disconnects are there for every elevator?

A

2

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14
Q

What are the electrical disconnects for in every elevator? (2)

A

One for high voltage hoisting motor.

Smaller one for elevator lights, fans and door opening motor.

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15
Q

When killing power to rescue someone from a stalled elevator only which motor should be disconnected?

A

The hoisting motor.

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16
Q

If there is a fire in an elevator cab firefighters should disconnect which breaker?

A

Both

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17
Q

To prevent exposure to open hoist ways hoist way doors _____ be pushed open from the outside.

A

Cannot

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18
Q

What is the range within which the opening car door can unlock and open the hoist way door?

A

The landing zone.

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19
Q

If a hoist way door is open anywhere in a hoist way the elevator ____.

A

Shouldn’t be able to run

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20
Q

What does opening the car door of a moving elevator do?

A

Should immediately stop that elevator.

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21
Q

Most modern elevators provide a two-way communication system that provides a link where?

A

With the building security office or a security desk in the lobby

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22
Q

When do all elevators stop?

A

Usually when primary power is lost.

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23
Q

When all elevators in each bank have returned to the lobby, what happens?

A

The last elevator down in each bank retains power in his operational.

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24
Q

If the fire is below what floor it’s generally best to use the stairs rather than elevators?

A

Below the 8th floor or so.

25
Q

What is the safest policy for high-rise firefighters and elevators?

A

Avoidance of elevators.

26
Q

There is no more dependable agent of fire company disintegration than what?

A

A long stair climb.

27
Q

What are the three modes of elevator operation.

A
  1. Automatic Operation
  2. Independent Service Operation
  3. Fire Service Operation.
28
Q

In what mode does the elevator no longer respond to floor calls and travels only to the floors the operator requests?

A

Independent service mode.

29
Q

Where is the switch located to activate independent service?

A

Behind a locked panel door in each elevator.

30
Q

What mode does the elevator go only where the operator wants and the doors automatically open fully upon arrival?

A

Independent service.

31
Q

What takes elevators away from building occupants, gives firefighters complete control and the doors do not open automatically?

A

Fire service operation.

32
Q

What phase is the function that recalls elevators to the lobby?

A

Phase 1 (Recall).

33
Q

Automatic recall is activated by what?

A

The fire alarm system.

34
Q

When what happens does the alarm system put all elevators in the affected elevator zone into phase 1?

A

When smoke is detected in an elevator lobby
Elevator machine room
Elevator hoistway

35
Q

Where is manual recall of elevators in phase 1 activated from?

A

A key switch which may be found at the elevator panel or in the elevator banks elevator lobby

36
Q

Phase one switches in individual elevator lobbies are generally what type of switches?

A

Three position

37
Q

What is the function that gives firefighters complete control of the elevators?

A

Phase 2.

38
Q

Where is phase 2 initiated from?

A

A key switch inside each elevator

39
Q

Door restrictors are devices that prevent car doors from being opened if the elevator isn’t within how many inches of the landing zone?

A

18”

40
Q

If the elevator stalls in a blind hoist way what is your only chance of self-extrication?

A

Open the car doors and force your way through the hoist way wall.

41
Q

In the absence of a functioning call cancel button it may be best to let a runaway elevator do what?

A

Run its course rather than subjecting it to the stress caused by a sudden stop function

42
Q

If the light on the panel near the phase two switch goes from steady glow to blinking what does it mean?

A

Smoke and/or heat is in the hoist way or elevator machine room.

43
Q

What is the first step for firefighters sent to deal with an elevator entrapment?

A

Call an elevator technician.

44
Q

What can be the simplest way of returning stalled elevators to service?

A

Reboot them.

45
Q

Before any rescue attempt in an elevator is made, a fire company must be sent to the elevator machine room to do what?

A

Kill power to the hoisting motor.

46
Q

What is another name for buttonless elevators?

A

Destination dispatch elevator system

47
Q

What are floors served by two separate elevator banks called

A

Crossover floors

48
Q

Power disconnects in elevator machine rooms are clearly identified by what

A

Elevator number

49
Q

Where are the hoist way doors that can be opened with special keys located

A

They are usually found on the top and bottom levels of multiple elevator hoistways. (41)

50
Q

What are safety devices that regulate the upper and lower travel limits of an elevator in a hoist way

A

Terminal switches. (41)

51
Q

Where are firefighters plug-in phones located

A

Fire control room

52
Q

Before you utilizing elevators firefighters should consider the location of the fire in relation to what two areas

A

Hoistway

Elevator machine room

53
Q

It is fairly common for the automatic recall function to only be initiated by detectors where

A

In elevator lobbies. (47)

54
Q

What does the bypass setting do

A

Override the alarm system returning elevators to automatic operation. (48)

55
Q

What is the first step in the most common sequence after phase 2 switch has been keyed to on

A

Select the desired floor (49)

56
Q

Where are the hoisting motors located in machine room less elevators

A

Beams in the top of the hoistway

57
Q

Instead of the traditional steel hoisting ropes MRLs use what

A

Flat polyurethane coated steel belt

58
Q

What type of elevator is an MRL

A

Traction elevator used in low and mid-rise buildings

59
Q

What is crucial information in predicting smoke migration through elevator shafts in regards to MRLs

A

Buildings in which a single hoistway serves multiple levels of elevator service

Firefighters And Highrises (13 decks)

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