romikgosai/squad_modified huggingface dataset:
Inspection service is designed to provide access to the hoistway and car top for inspection and maintenance purposes by qualified elevator mechanics. It is first activated by a key switch on the car operating panel usually labeled 'Inspection', 'Car Top', 'Access Enable' or 'HWENAB'. When this switch is activated the elevator will come to a stop if moving, car calls will be canceled (and the buttons disabled), and hall calls will be assigned to other elevator cars in the group (or canceled in a single elevator configuration). The elevator can now only be moved by the corresponding 'Access' key switches, usually located at the highest (to access the top of the car) and lowest (to access the elevator pit) landings. The access key switches will allow the car to move at reduced inspection speed with the hoistway door open. This speed can range from anywhere up to 60% of normal operating speed on most controllers, and is usually defined by local safety codes.

Questions and answers:
['
Q: Who is authorized to provide inspection and/or maintenance of the elevator?
A: qualified elevator mechanics', '
Q: What is the purpose of the Inspection service? 
A: to provide access to the hoistway and car top for inspection and maintenance', "
Q: What action initiates it's activation?
A: a key switch on the car operating panel usually labeled 'Inspection', 'Car Top', 'Access Enable' or 'HWENAB", "
Q: WWhat's the first thing to happen when the switch is activated?
A: the elevator will come to a stop if moving", "
Q: Once activatated, what is the only way to deactivate it?
A: The elevator can now only be moved by the corresponding 'Access' key switches"]
Phase one mode is activated by a corresponding smoke sensor or heat sensor in the building. Once an alarm has been activated, the elevator will automatically go into phase one. The elevator will wait an amount of time, then proceed to go into nudging mode to tell everyone the elevator is leaving the floor. Once the elevator has left the floor, depending on where the alarm was set off, the elevator will go to the fire-recall floor. However, if the alarm was activated on the fire-recall floor, the elevator will have an alternate floor to recall to. When the elevator is recalled, it proceeds to the recall floor and stops with its doors open. The elevator will no longer respond to calls or move in any direction. Located on the fire-recall floor is a fire-service key switch. The fire-service key switch has the ability to turn fire service off, turn fire service on or to bypass fire service. The only way to return the elevator to normal service is to switch it to bypass after the alarms have reset.

Questions and answers:
['
Q: What initiates Phase one mode?
A: a corresponding smoke sensor or heat sensor in the building', '
Q: What happens when an elevator goes into Phase one mode?
A: The elevator will wait an amount of time, then proceed to go into nudging mode to tell everyone the elevator is leaving the floor', '
Q: Where does the elevator go from there?
A: the elevator will go to the fire-recall floor', '
Q: How is the elevator enabled for service after the incident?
A: The only way to return the elevator to normal service is to switch it to bypass after the alarms have reset', '
Q: What happens if the mode is activated on the fire-recall floor?
A: the elevator will have an alternate floor to recall to']
Phase-two mode can only be activated by a key switch located inside the elevator on the centralized control panel. This mode was created for firefighters so that they may rescue people from a burning building. The phase-two key switch located on the COP has three positions: off, on, and hold. By turning phase two on, the firefighter enables the car to move. However, like independent-service mode, the car will not respond to a car call unless the firefighter manually pushes and holds the door close button. Once the elevator gets to the desired floor it will not open its doors unless the firefighter holds the door open button. This is in case the floor is burning and the firefighter can feel the heat and knows not to open the door. The firefighter must hold door open until the door is completely opened. If for any reason the firefighter wishes to leave the elevator, they will use the hold position on the key switch to make sure the elevator remains at that floor. If the firefighter wishes to return to the recall floor, they simply turn the key off and close the doors.

Questions and answers:
['
Q: How is the Phase-two mode enabled?
A: Phase-two mode can only be activated by a key switch located inside the elevator on the centralized control panel', '
Q: What actions must a firefighter take to activate Phase-two mode?
A: manually pushes and holds the door close button', '
Q: What does Phase-two do?
A: enables the car to move', '
Q: What is the purpose of the Phase-two mode?
A: This mode was created for firefighters so that they may rescue people from a burning building', '
Q: Where is the Phase-two key switch to be found?
A: on the COP']
Once the elevator arrives at the floor, it will park with its doors open and the car buttons will be disabled to prevent a passenger from taking control of the elevator. Medical personnel must then activate the code-blue key switch inside the car, select their floor and close the doors with the door close button. The elevator will then travel non-stop to the selected floor, and will remain in code-blue service until switched off in the car. Some hospital elevators will feature a 'hold' position on the code-blue key switch (similar to fire service) which allows the elevator to remain at a floor locked out of service until code blue is deactivated.

Questions and answers:
['
Q: Upon arriving at the desinated floor, what does the elevator do?
A: it will park with its doors open and the car buttons will be disabled to prevent a passenger from taking control of the elevator', '
Q: What steps do medical personnel take at that point?
A: Medical personnel must then activate the code-blue key switch inside the car, select their floor and close the doors with the door close button', '
Q: Where then does the elevator go?
A: The elevator will then travel non-stop to the selected floor', '
Q: Once it arrives what does the elevator do
A: will remain in code-blue service until switched off in the car', '
Q: What does the hold feature do?
A: allows the elevator to remain at a floor locked out of service until code blue is deactivated']
When power is lost in a traction elevator system, all elevators will initially come to a halt. One by one, each car in the group will return to the lobby floor, open its doors and shut down. People in the remaining elevators may see an indicator light or hear a voice announcement informing them that the elevator will return to the lobby shortly. Once all cars have successfully returned, the system will then automatically select one or more cars to be used for normal operations and these cars will return to service. The car(s) selected to run under emergency power can be manually overridden by a key or strip switch in the lobby. In order to help prevent entrapment, when the system detects that it is running low on power, it will bring the running cars to the lobby or nearest floor, open the doors and shut down.

Questions and answers:
['
Q: What sequence of events happens when the power shuts off in a traction elevator and the elevators all stop?
A: One by one, each car in the group will return to the lobby floor, open its doors and shut down', '
Q: What do any passengers experience at this point?
A: People in the remaining elevators may see an indicator light or hear a voice announcement informing them that the elevator will return to the lobby shortly', '
Q: After all cars go to the lobby, what is the next step?
A: the system will then automatically select one or more cars to be used for normal operations and these cars will return to service', '
Q: How are the selected cars then readied for passengers? 
A: The car(s) selected to run under emergency power can be manually overridden by a key or strip switch in the lobby', '
Q: What is a safety feature to prevent entrapment?
A: when the system detects that it is running low on power, it will bring the running cars to the lobby or nearest floor, open the doors and shut down']
In hydraulic elevator systems, emergency power will lower the elevators to the lowest landing and open the doors to allow passengers to exit. The doors then close after an adjustable time period and the car remains unusable until reset, usually by cycling the elevator main power switch. Typically, due to the high current draw when starting the pump motor, hydraulic elevators are not run using standard emergency power systems. Buildings like hospitals and nursing homes usually size their emergency generators to accommodate this draw. However, the increasing use of current-limiting motor starters, commonly known as "soft-start" contactors, avoid much of this problem, and the current draw of the pump motor is less of a limiting concern.

Questions and answers:
['
Q: How do hydraulic elevators work in emergencies?
A: emergency power will lower the elevators to the lowest landing and open the doors to allow passengers to exit', '
Q: Once the passengers have exited, what happens?
A: The doors then close after an adjustable time period and the car remains unusable until reset, usually by cycling the elevator main power switch', '
Q: For what reason are hydraulic elevators not powered by the standard emergency system?
A: due to the high current draw when starting the pump motor', '
Q: What are current-limiting motor starters referred to as?
A: "soft-start" contactors']
Past problems with hydraulic elevators include underground electrolytic destruction of the cylinder and bulkhead, pipe failures, and control failures. Single bulkhead cylinders, typically built prior to a 1972 ASME A17.1 Elevator Safety Code change requiring a second dished bulkhead, were subject to possible catastrophic failure. The code previously permitted only single-bottom hydraulic cylinders. In the event of a cylinder breach, the fluid loss results in uncontrolled down movement of the elevator. This creates two significant hazards: being subject to an impact at the bottom when the elevator stops suddenly and being in the entrance for a potential shear if the rider is partly in the elevator. Because it is impossible to verify the system at all times, the code requires periodic testing of the pressure capability. Another solution to protect against a cylinder blowout is to install a plunger gripping device. One commercially available is known by the marketing name "LifeJacket". This is a device which, in the event of an uncontrolled downward acceleration, nondestructively grips the plunger and stops the car. A device known as an overspeed or rupture valve is attached to the hydraulic inlet/outlet of the cylinder and is adjusted for a maximum flow rate. If a pipe or hose were to break (rupture), the flow rate of the rupture valve will surpass a set limit and mechanically stop the outlet flow of hydraulic fluid, thus stopping the plunger and the car in the down direction.

Questions and answers:
['
Q: Underground electrolytic malfunctions in hydraulic elevators can result in the destruction of what? 
A: the cylinder and bulkhead', '
Q: What Elevator Safety Code change required a second dished bulkhead? 
A: 1972 ASME A17.1', '
Q: Before the code change was enacted what was the only permitted hydraulic cylinder type?
A: single-bottom', '
Q: Once the cylinder is breached, what calamity does the loss of fluid cause?
A: uncontrolled down movement of the elevator', '
Q: What testing does the code require?
A: periodic testing of the pressure capability']
Safety testing of mine shaft elevator rails is routinely undertaken. The method involves destructive testing of a segment of the cable. The ends of the segment are frayed, then set in conical zinc molds. Each end of the segment is then secured in a large, hydraulic stretching machine. The segment is then placed under increasing load to the point of failure. Data about elasticity, load, and other factors is compiled and a report is produced. The report is then analyzed to determine whether or not the entire rail is safe to use.

Questions and answers:
['
Q: What part of the mine shaft requires routine testing?
A: elevator rails', '
Q: What is  the first step in destructive testing?
A: The ends of the segment are frayed, then set in conical zinc molds', '
Q: Afterwards, what type of machine is the segment secured in?
A: hydraulic stretching machine', '
Q: What type of testing is done to the an area of the cable?
A: destructive testing', '
Q: What types of information are collected in the process?
A: Data about elasticity, load, and other factors is compiled']
Passenger elevators capacity is related to the available floor space. Generally passenger elevators are available in capacities from 500 to 2,700 kg (1,000–6,000 lb) in 230 kg (500 lb) increments.[citation needed] Generally passenger elevators in buildings of eight floors or fewer are hydraulic or electric, which can reach speeds up to 1 m/s (200 ft/min) hydraulic and up to 152 m/min (500 ft/min) electric. In buildings up to ten floors, electric and gearless elevators are likely to have speeds up to 3 m/s (500 ft/min), and above ten floors speeds range 3 to 10 m/s (500–2,000 ft/min).[citation needed]

Questions and answers:
['
Q: What dictates passenger elevator capacities?
A: the available floor space', '
Q: What capacities are passenger elevators availablee in?
A: from 500 to 2,700 kg (1,000–6,000 lb) in 230 kg (500 lb) increments', '
Q: What types of passenger elevators are installed in structures of up to eight floors?
A: hydraulic or electric', '
Q: Hydraulic elevators can reach speeds up to 1m/s or how many feet per minute?
A: 200', '
Q: Electric elevators can reach speeds up to 3 m/s or how many feet per minute?
A: 500']
Sometimes passenger elevators are used as a city transport along with funiculars. For example, there is a 3-station underground public elevator in Yalta, Ukraine, which takes passengers from the top of a hill above the Black Sea on which hotels are perched, to a tunnel located on the beach below. At Casco Viejo station in the Bilbao Metro, the elevator that provides access to the station from a hilltop neighborhood doubles as city transportation: the station's ticket barriers are set up in such a way that passengers can pay to reach the elevator from the entrance in the lower city, or vice versa. See also the Elevators for urban transport section.

Questions and answers:
['
Q: Passenger elevators, used in city transport share similarities to what other ascending and descending vehicles counterbalancing each other?    
A: funiculars', '
Q: What type of public elevator in Yalta, Ukraine, transport passengers from a hill above the Black Sea to a tunnel down on the beach?
A: underground public elevator', '
Q: The elevator located at the Casco Viejo station in the Bilbao Metro is also used for what?
A: city transportation', '
Q: How is that set up?
A: ticket barriers are set up in such a way that passengers can pay to reach the elevator from the entrance in the lower city, or vice versa']
A freight elevator, or goods lift, is an elevator designed to carry goods, rather than passengers. Freight elevators are generally required to display a written notice in the car that the use by passengers is prohibited (though not necessarily illegal), though certain freight elevators allow dual use through the use of an inconspicuous riser. In order for an elevator to be legal to carry passengers in some jurisdictions it must have a solid inner door. Freight elevators are typically larger and capable of carrying heavier loads than a passenger elevator, generally from 2,300 to 4,500 kg. Freight elevators may have manually operated doors, and often have rugged interior finishes to prevent damage while loading and unloading. Although hydraulic freight elevators exist, electric elevators are more energy efficient for the work of freight lifting.[citation needed]

Questions and answers:
['
Q: What is another name for a freight elevator?
A: goods lift', '
Q: What type of notice is required to be visible in most freight elevators?
A: a written notice in the car that the use by passengers is prohibited', '
Q: Some freight elevators allow transport of both freight and passengers by using what?
A: an inconspicuous riser', '
Q: How do freight elevators differ from passenger elevators?
A: Freight elevators are typically larger and capable of carrying heavier loads than a passenger elevator', '
Q: What type of elevator is better suited for carrying freight?
A: electric elevators']
Stage lifts and orchestra lifts are specialized elevators, typically powered by hydraulics, that are used to raise and lower entire sections of a theater stage. For example, Radio City Music Hall has four such elevators: an orchestra lift that covers a large area of the stage, and three smaller lifts near the rear of the stage. In this case, the orchestra lift is powerful enough to raise an entire orchestra, or an entire cast of performers (including live elephants) up to stage level from below. There's a barrel on the background of the image of the left which can be used as a scale to represent the size of the mechanism

Questions and answers:
['
Q: How are stage lifts powered?
A: by hydraulics', '
Q: How many hydraulic elevators are there at Radio City Music Hall?
A: four', '
Q: What is an orchestra lift used for?
A: to raise an entire orchestra, or an entire cast of performers (including live elephants) up to stage level from below', '
Q: What is on the background of the image which can be used as a scale to represent the size of the mechanism?
A: a barrel']
A residential elevator is often permitted to be of lower cost and complexity than full commercial elevators. They may have unique design characteristics suited for home furnishings, such as hinged wooden shaft-access doors rather than the typical metal sliding doors of commercial elevators. Construction may be less robust than in commercial designs with shorter maintenance periods, but safety systems such as locks on shaft access doors, fall arrestors, and emergency phones must still be present in the event of malfunction.

Questions and answers:
['
Q: What type of elevators are generally less costly than full commercial elevators?
A: residential', '
Q: What type of doors do commercial elevators use?
A: metal sliding', '
Q: What safety mechanisms are still required, despite lower design costs?
A: locks on shaft access doors, fall arrestors, and emergency phones', '
Q: What type of elevator has a hinged wooden shaft-access door?
A: residential']
Some types of residential elevators do not use a traditional elevator shaft, machine room, and elevator hoistway. This allows an elevator to be installed where a traditional elevator may not fit, and simplifies installation. The ASME board first approved machine-room-less systems in a revision of the ASME A17.1 in 2007. Machine-room-less elevators have been available commercially since the mid 1990s, however cost and overall size prevented their adoption to the residential elevator market until around 2010.

Questions and answers:
['
Q: What types of elevators occassionaly do not use a traditional elevator shaft, machine room or hoistway?
A: residential', '
Q: In what year were Machine-room-less elevators first allowed?
A: 2007', '
Q: This decision reflected a revision of what?
A: the ASME A17.1', '
Q: What benefits does this serve?
A: allows an elevator to be installed where a traditional elevator may not fit, and simplifies installation']
Dumbwaiters are small freight elevators that are intended to carry food, books or other small freight loads rather than passengers. They often connect kitchens to rooms on other floors. they usually do not have the same safety features found in passenger elevators, like various ropes for redundancy. they have a lower capacity, and they can be up to 1 meter (3 ft.) tall. there's a control panel at every stop, that mimics the ones found in passenger elevators, like calling, door control, floor selection.

Questions and answers:
['
Q: What are small freight elevators used for things such as food, called?
A: Dumbwaiters', '
Q: What rooms are dumbwaiters frequently used in?
A: They often connect kitchens to rooms on other floors', '
Q: What is a safety feature found in passenger elevators they generally do not have?
A: various ropes for redundancy', '
Q: What is the height restriction on dumbwaiters?
A: they can be up to 1 meter (3 ft.) tall', '
Q: What features do they have that mimic passenger elevators?
A: calling, door control, floor selection']
Material transport elevators generally consist of an inclined plane on which a conveyor belt runs. The conveyor often includes partitions to ensure that the material moves forward. These elevators are often used in industrial and agricultural applications. When such mechanisms (or spiral screws or pneumatic transport) are used to elevate grain for storage in large vertical silos, the entire structure is called a grain elevator. Belt elevators are often used in docks for loading loose materials such as coal, iron ore and grain into the holds of bulk carriers

Questions and answers:
['
Q: What do the partians do on the conveyor?
A: ensure that the material moves forward', '
Q: An inclined plane with a conveyor belt describes what type of elevator?
A: Material transport elevators', '
Q: What industries are these types of elevators generally used in?
A: industrial and agricultural applications', '
Q: What are spiral screws used for?
A: to elevate grain for storage in large vertical silos', '
Q: What type of elevators are used for loading loose materials into bulk carriers?
A: Belt elevators']
Elevators necessitated new social protocols. When Nicholas II of Russia visited the Hotel Adlon in Berlin, his courtiers panicked about who would enter the elevator first, and who would press the buttons. In Lifted: A Cultural History of the Elevator, author Andreas Bernard documents other social impacts caused by the modern elevator, including thriller movies about stuck elevators, casual encounters and sexual tension on elevators, the reduction of personal space, and concerns about personal hygiene.

Questions and answers:
['
Q: The invention of elevators brought with it questions of social etiquette and formalities, generally referred to as what?
A: social protocols', '
Q: The last tsar of Russia, Nicholas ll encountered his first elevator at the Hotel Adloin in what city?
A: Berlin', '
Q: This caused a stir in deciding who should enter first and who should do what?
A: press the buttons', '
Q: Andreas Bernard wrote about the social aspects of the new elevators in what book?
A: Lifted: A Cultural History of the Elevator']
In addition to the call buttons, elevators usually have floor indicators (often illuminated by LED) and direction lanterns. The former are almost universal in cab interiors with more than two stops and may be found outside the elevators as well on one or more of the floors. Floor indicators can consist of a dial with a rotating needle, but the most common types are those with successively illuminated floor indications or LCDs. Likewise, a change of floors or an arrival at a floor is indicated by a sound, depending on the elevator.

Questions and answers:
['
Q: Modern elevator position or floor indicaters often use what type of bulbs?
A: LED', '
Q: What type of lanterns are used outside elevators as well as inside most cabs?
A: direction lanterns', '
Q: What do floor indicaters often consist of?
A: successively illuminated floor indications or LCDs', '
Q: What generally indicates the arrival of the elevator at a new floor?
A: a sound']