Upstairs

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Quizzes Created: 16 | Total Attempts: 123,366
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Subject: STAIR/ ESCALATOR/ MOVING WALK/TRAVELATOR/ ELEVATOR/ LIFT
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Questions and Answers
  • 1. 

    Escalator should not be use for?

    • A.

      Vertical transport

    • B.

      Fire escape

    • C.

      Dramatic feature

    • D.

      All of the above

    Correct Answer
    B. Fire escape
    Explanation
    Escalators should not be used as fire escapes because in case of a fire, escalators can become a dangerous bottleneck. They are not designed to handle large crowds in emergency situations and can quickly become overcrowded, leading to potential injuries or even fatalities. Additionally, escalators rely on electricity to function, and during a fire, power may be cut off, rendering them useless. Therefore, it is important to use designated fire escape routes and stairs instead of escalators in case of a fire.

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  • 2. 

    What is the most economical layout for escalator?

    • A.

      Criss-crossed

    • B.

      Straight

    • C.

      Parallel

    • D.

      None

    Correct Answer
    B. Straight
    Explanation
    The most economical layout for an escalator is straight. This is because a straight layout requires the least amount of space and materials compared to other layouts. It also allows for a more efficient flow of people, as they can easily see and access the escalator without any obstructions. Additionally, a straight layout reduces the complexity of installation and maintenance, making it a cost-effective choice.

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  • 3. 

    Main purpose of a walkalator, moving walk, travelator?

    • A.

      To control the flow of traffic

    • B.

      Convenience of pedestrians

    • C.

      Aesthetic

    • D.

      None

    Correct Answer
    B. Convenience of pedestrians
    Explanation
    The main purpose of a walkalator, moving walk, or travelator is to provide convenience for pedestrians. These devices are designed to transport people more efficiently and comfortably, especially in areas with high foot traffic. By moving pedestrians along at a steady pace, walkalators help to reduce congestion and make it easier for people to navigate through busy areas such as airports, shopping malls, or train stations. They offer a convenient alternative to walking long distances, especially for individuals with mobility issues or heavy luggage.

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  • 4. 

    What cannot be achieved by an escalator that is possible with travelator?

    • A.

      Pedestrian with trolley

    • B.

      Move pedestrians carrying heavy object

    • C.

      Slopes are higher

    • D.

      Speeds is more flexible and easy to control

    Correct Answer
    A. Pedestrian with trolley
    Explanation
    An escalator cannot accommodate a pedestrian with a trolley because the steps of an escalator are fixed and cannot be adjusted to accommodate larger or bulkier items. On the other hand, a travelator, also known as a moving walkway, is a flat surface that can easily accommodate pedestrians with trolleys or any other heavy objects as there are no steps involved. Therefore, the ability to accommodate pedestrians with trolleys is something that can be achieved with a travelator but not with an escalator.

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  • 5. 

    What is the best escalator layout is best if the prime consideration is cost?

    • A.

      Criss-crossed

    • B.

      Parallel

    • C.

      Multiple parallel

    • D.

      None

    Correct Answer
    B. Parallel
    Explanation
    Parallel escalator layout is the best if the prime consideration is cost. This is because parallel escalators require less space and are easier to install compared to criss-crossed or multiple parallel layouts. Additionally, parallel escalators are more cost-effective in terms of maintenance and repairs as they have a simpler design and fewer components. Therefore, by opting for a parallel layout, the overall cost of the escalator system can be minimized.

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  • 6. 

    What is the Maximum and Minimum speed of an escalator?

    • A.

      30 - 40 fpm

    • B.

      90-120 fpm

    • C.

      85 - 120 fpm

    • D.

      80-150 fpm

    Correct Answer
    B. 90-120 fpm
    Explanation
    The maximum and minimum speed of an escalator is 90-120 fpm. This means that the escalator can operate at a minimum speed of 90 feet per minute and a maximum speed of 120 feet per minute.

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  • 7. 

    Slope of an escalator?

    • A.

      25%

    • B.

      20%

    • C.

      35%

    • D.

      30%

    Correct Answer
    D. 30%
    Explanation
    The correct answer is 30% because the slope of an escalator refers to the angle at which it is inclined or the steepness of its incline. A 30% slope means that for every 100 units of horizontal distance, the escalator rises 30 units vertically. This indicates a moderate incline, neither too steep nor too shallow.

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  • 8. 

    Usual speed of escalator?

    • A.

      90fpm

    • B.

      120 fpm

    • C.

      125fpm

    • D.

      150fpm

    Correct Answer
    A. 90fpm
    Explanation
    The usual speed of an escalator is typically measured in feet per minute (fpm). The correct answer is 90fpm. This means that the escalator moves at a speed of 90 feet per minute, which is considered to be the average speed for most escalators.

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  • 9. 

    Device that "control" the elevator doors?

    • A.

      Control switch

    • B.

      Door switch

    • C.

      Safety switch

    • D.

      Emergency switch

    Correct Answer
    A. Control switch
    Explanation
    A control switch is the device that "controls" the elevator doors. It is responsible for opening and closing the doors, allowing passengers to enter and exit the elevator. The control switch is typically located inside the elevator car and is operated by the elevator operator or passengers using buttons or switches. This switch communicates with the elevator's control system to initiate the door opening and closing sequence.

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  • 10. 

    Allow to transport pedestrians or carts in 12 degree angle?

    • A.

      Moving ramp

    • B.

      Travelator

    • C.

      Walkalator

    • D.

      Escalator

    Correct Answer
    B. Travelator
    Explanation
    A travelator is a moving ramp that allows pedestrians or carts to be transported at a 12-degree angle. It is a type of conveyor belt that is commonly found in airports and shopping malls, providing a convenient way for people to move between different levels of a building. Unlike an escalator, which moves at a steeper angle, a travelator is designed to transport people and objects more smoothly and comfortably.

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  • 11. 

    The maximum length of a walkalator is 250 meters. Why?

    • A.

      To allow users to exit at the sides

    • B.

      Maintenance and safety control

    • C.

      Allow reversal directions

    • D.

      Standard length in the market do not exceeds more than 250m

    Correct Answer
    A. To allow users to exit at the sides
    Explanation
    The maximum length of a walkalator is 250 meters to allow users to exit at the sides. This is because walkalators are designed to provide convenience and ease of movement for pedestrians in busy areas such as airports or shopping malls. By keeping the length within 250 meters, users can easily access the sides and exit the walkalator whenever needed. This ensures that users have the flexibility to enter and exit the walkalator at any point along its length, enhancing safety and convenience.

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  • 12. 

    Why escalators have built-in fire alarm system?

    • A.

      Device and body of escalator is not 100% fire proof

    • B.

      Device of the escalator have wiring and sensitive parts that is more sensitive to fire and ignition

    • C.

      It's a hole for each floors

    • D.

      Best location for alarm system as it is located in common areas

    Correct Answer
    C. It's a hole for each floors
    Explanation
    The escalators have a built-in fire alarm system because they serve as a hole or an opening between each floor. This means that in case of a fire, smoke and flames can easily travel through the escalator shaft to reach different levels of the building. Additionally, the device and body of the escalator are not completely fireproof, and the wiring and sensitive parts of the escalator are more susceptible to fire and ignition. Therefore, having a fire alarm system integrated into the escalator ensures early detection and alerts people in common areas, allowing them to evacuate safely.

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  • 13. 

    In PD 1185 what is the minimum headroom for class A & B stairs.

    • A.

      2.10 mts.

    • B.

      2.00 mts.

    • C.

      1.80 mts.

    • D.

      None

    Correct Answer
    B. 2.00 mts.
    Explanation
    The minimum headroom for class A & B stairs in PD 1185 is 2.00 mts. This means that the vertical distance between the nosing of the treads and the soffit above should be at least 2.00 mts. This ensures that there is enough space for people to comfortably walk up and down the stairs without hitting their heads on the ceiling.

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  • 14. 

    In PD 1185 what is the minimum dimension of landings in direction of travel for class A & B stairs?

    • A.

      115 cms.

    • B.

      112 cms.

    • C.

      110cms.

    • D.

      100 cms.

    Correct Answer
    B. 112 cms.
    Explanation
    The minimum dimension of landings in the direction of travel for class A & B stairs in PD 1185 is 112 cms.

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  • 15. 

    In PD 1185 what is the minimum inner radius of a monumental stair.

    • A.

      15 mts

    • B.

      7.50 mts

    • C.

      8.00 mts

    • D.

      10.00 mts

    Correct Answer
    B. 7.50 mts
    Explanation
    The minimum inner radius of a monumental stair in PD 1185 is 7.50 mts.

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  • 16. 

    In PD 1185 what is the minimum width of a class A ramp.    

    • A.

      115 cms.

    • B.

      112 cms.

    • C.

      100 cms.

    • D.

      90 cms

    Correct Answer
    B. 112 cms.
    Explanation
    The correct answer is 112 cms. This is because in PD 1185, the minimum width of a class A ramp is specified to be 112 cms.

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  • 17. 

    In PD 1185 what is the maximum vertical height in floors for an escalator?

    • A.

      1floor

    • B.

      2floors

    • C.

      3floors

    • D.

      4floors

    Correct Answer
    A. 1floor
    Explanation
    PD 1185 refers to the Fire Code of the Philippines. In this context, the maximum vertical height in floors for an escalator is 1 floor. This means that an escalator can only span a maximum of one floor in height. It cannot go beyond that limit.

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  • 18. 

    In PD 1185 what is the minimum width of a fire escape stair for existing stairs. 55.9 cms.

    • A.

      55.9 cms.

    • B.

      120 cms.

    • C.

      70 cms.

    • D.

      90 cms

    Correct Answer
    A. 55.9 cms.
    Explanation
    The correct answer is 55.9 cms. This means that according to PD 1185, the minimum width of a fire escape stair for existing stairs should be 55.9 cms.

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  • 19. 

    In PD 1185 what is the minimum headroom clearance for a fire escape stair for existing stairs?

    • A.

      2.13 mts.

    • B.

      2.00 mts

    • C.

      1.80 mts

    • D.

      1.98 mts

    Correct Answer
    A. 2.13 mts.
    Explanation
    The minimum headroom clearance for a fire escape stair for existing stairs in PD 1185 is 2.13 meters. This means that there should be a minimum vertical distance of 2.13 meters from the highest point of the tread to the ceiling or any obstruction above the stair. This clearance is important to ensure that people can safely and comfortably use the fire escape stair without hitting their heads or feeling claustrophobic.

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  • 20. 

    In PD 1185 what is the minimum headroom clearance for a fire escape stair for small buildings?

    • A.

      2.13 mts.

    • B.

      2.00 mts

    • C.

      1.80 mts

    • D.

      1.98 mts

    Correct Answer
    D. 1.98 mts
    Explanation
    The minimum headroom clearance for a fire escape stair for small buildings, according to PD 1185, is 1.98 meters.

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  • 21. 

    In PD 1185 what is the standard inner radius of a curved stair in business occupancies? 

    • A.

      7.50 cms

    • B.

      In PD 1185 what is the standard inner radius of a curved stair in business occupancies. 763 cms.

    • C.

      90 cms

    • D.

      80 cms

    Correct Answer
    B. In PD 1185 what is the standard inner radius of a curved stair in business occupancies. 763 cms.
  • 22. 

    In PD 1185 what is the maximum height of riser for Class 'A' stairs.

    • A.

      19 cms.

    • B.

      20 cms

    • C.

      22 cms

    • D.

      None

    Correct Answer
    A. 19 cms.
    Explanation
    The maximum height of riser for Class 'A' stairs in PD 1185 is 19 cms.

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  • 23. 

    In PD 1185 what is the maximum height of riser for Class 'B' Stairs?

    • A.

      19 cms.

    • B.

      20 cms

    • C.

      21.3 cms

    • D.

      None

    Correct Answer
    B. 20 cms
    Explanation
    The maximum height of riser for Class 'B' stairs in PD 1185 is 20 cms.

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  • 24. 

    In PD 1185 what is the minimum width of Class 'A' ramp?

    • A.

      120 cms.

    • B.

      112 cms.

    • C.

      90 cms.

    • D.

      76 cms.

    Correct Answer
    A. 120 cms.
    Explanation
    The minimum width of a Class 'A' ramp in PD 1185 is 120 cms.

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  • 25. 

    In PD 1185 what is the minimum width of Class 'B' ramp?

    • A.

      120 cms.

    • B.

      80 cms.

    • C.

      90 cms.

    • D.

      76 cms.

    Correct Answer
    D. 76 cms.
    Explanation
    The correct answer is 76 cms because in PD 1185, the minimum width of Class 'B' ramp is specified to be 76 cms.

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  • 26. 

    In PD 1185 what is the maximum height between landings for fire escape for existing stairs?

    • A.

      3.66 mts.

    • B.

      7.50 mts

    • C.

      2.10 mts

    • D.

      1.90 mts

    Correct Answer
    A. 3.66 mts.
    Explanation
    According to PD 1185, the maximum height between landings for fire escape for existing stairs is 3.66 meters.

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  • 27. 

    Inclined structural member that supports the steps of a stair?

    • A.

      Flight of step

    • B.

      Curtain step

    • C.

      Carriage

    • D.

      Tread bracket

    Correct Answer
    C. Carriage
    Explanation
    A carriage is a structural member that supports the steps of a stair. It is inclined and provides stability and strength to the staircase. It is designed to bear the weight of the steps and the individuals using the staircase.

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  • 28. 

    Extended bars provided on slab on fill for concrete stairs?

    • A.

      Diagonal bars

    • B.

      Dowel

    • C.

      Starter bars

    • D.

      Extrusion bars

    Correct Answer
    B. Dowel
    Explanation
    Dowels are used in concrete construction to provide a connection between two separate concrete elements, such as a slab and a stair. In the case of concrete stairs on a slab on fill, dowels are used to ensure that the stairs are securely attached to the slab. The dowels are typically inserted into the slab and extend into the stair, providing a strong and stable connection between the two elements. This helps to prevent any movement or separation between the slab and the stairs, ensuring the structural integrity of the overall construction.

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  • 29. 

    A central post from which the winders of a spiral stair radiate?

    • A.

      Stud post

    • B.

      Newel post

    • C.

      Spiral post

    • D.

      Core

    Correct Answer
    B. Newel post
    Explanation
    A newel post is a central post from which the winders of a spiral stair radiate. It is a structural element that provides support and stability to the staircase. The winders, which are the wedge-shaped steps of a spiral staircase, are attached to the newel post, allowing the staircase to twist and turn while maintaining its structural integrity. The newel post also serves as a decorative feature, often featuring intricate carvings or designs.

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  • 30. 

    Any of a series of winders so arranged that they are nearly as wide at the inside of the stair as the adjacent fliers.

    • A.

      Balanced tread

    • B.

      Elliptical stair

    • C.

      Elliptical stair

    • D.

      Dancing winder

    Correct Answer
    D. Dancing winder
    Explanation
    A dancing winder is a type of staircase design where the winders (steps that change direction) are arranged in such a way that they are almost as wide at the inside of the stair as the adjacent fliers (straight steps). This arrangement allows for a smoother transition between the winders and the straight steps, creating a more balanced and visually appealing staircase design.

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  • 31. 

    For a 3-storey building that is intended for a senior citizen center with a limited budget and space, what is the appropriate type of elevator?

    • A.

      Hydraulic

    • B.

      Traction

    • C.

      Stretcher

    • D.

      Spiral ramp

    Correct Answer
    A. Hydraulic
    Explanation
    For a 3-storey building with a limited budget and space, a hydraulic elevator would be the appropriate type. Hydraulic elevators are known for their cost-effectiveness and compact design, making them ideal for buildings with limited resources and space constraints. These elevators use a hydraulic system to move the car, which is more affordable and requires less space compared to other types of elevators. Additionally, hydraulic elevators are known for their smooth and quiet operation, providing a comfortable ride for senior citizens in the building.

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  • 32. 

    Connections between elevator cars and openings?

    • A.

      Traction

    • B.

      Sheave

    • C.

      Hoist

    • D.

      Guide rails

    Correct Answer
    C. Hoist
    Explanation
    The hoist is responsible for lifting and lowering the elevator cars. It is the mechanism that provides the necessary power and control to move the elevator up and down. Without the hoist, the elevator cars would not be able to move between floors. The other options mentioned, such as traction, sheave, and guide rails, are all components that work together with the hoist to ensure the safe and efficient operation of the elevator system.

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  • 33. 

    In an electric elevator, this cable provides electrical power to the car and "travel" with hoist?

    • A.

      Traveling cable

    • B.

      Governor rope

    • C.

      Conveying cable

    • D.

      Traction cable

    Correct Answer
    A. Traveling cable
    Explanation
    The traveling cable in an electric elevator is responsible for providing electrical power to the car and also travels with the hoist. It is the cable that connects the car to the power source and allows for the transmission of electricity to operate the elevator.

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  • 34. 

    What type of elevator is used for low rise buildings where speed is not the main consideration?

    • A.

      Gear-less traction elevator

    • B.

      Geared elevator

    • C.

      Hydraulic

    • D.

      Deck elevator

    Correct Answer
    C. Hydraulic
    Explanation
    Hydraulic elevators are commonly used in low-rise buildings where speed is not a primary concern. Unlike gear-less traction elevators, which are better suited for high-rise buildings due to their faster speeds and smoother rides, hydraulic elevators operate at slower speeds and are more cost-effective for shorter distances. They work by using a hydraulic fluid and a piston to lift the elevator car. This type of elevator is ideal for buildings with fewer floors and where a slower speed is acceptable.

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  • 35. 

    What is the minimum depth of an elevator pit?

    • A.

      400 mm

    • B.

      450 mm

    • C.

      500 mm

    • D.

      600 mm

    Correct Answer
    D. 600 mm
    Explanation
    The minimum depth of an elevator pit is 600 mm. This depth is necessary to accommodate the various components of the elevator system, such as the elevator car, counterweights, and safety mechanisms. A deeper pit ensures that there is enough space for these components to operate effectively and safely. Additionally, a deeper pit allows for easier access and maintenance of the elevator system. Therefore, a minimum depth of 600 mm is required for an elevator pit.

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  • 36. 

    In elevator default system, where would the elevator car go in case of fire emergency or power failure?

    • A.

      Lowest level at the basement

    • B.

      Ground floor or topmost level. Which ever is the nearest upon power failure occur

    • C.

      Always at ground level

    • D.

      Going down until the emergency power can carry down slowly

    Correct Answer
    C. Always at ground level
    Explanation
    In case of a fire emergency or power failure, the elevator car in an elevator default system would always go to the ground level. This is the safest option as it allows passengers to exit the elevator easily and access the nearest exit or emergency services. Going to the ground level also ensures that passengers are not trapped in the elevator during a fire emergency or power failure.

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  • 37. 

    In BP344 what is the minimum distance of the Building Main Entrance to the Elevator?60 m

    • A.

      45 m

    • B.

      30 m

    • C.

      33 m

    • D.

      46 m

    Correct Answer
    B. 30 m
    Explanation
    The minimum distance of the Building Main Entrance to the Elevator in BP344 is 30 m. This means that according to the regulations of BP344, the main entrance of the building should be at least 30 meters away from the elevator. This distance requirement may be in place to ensure that there is enough space for people to safely enter and exit the elevator without any obstructions or congestion near the entrance of the building.

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  • 38. 

    In BP344 what is the minimum dimension of an elevator door width?

    • A.

      0.71 m

    • B.

      0.80 m

    • C.

      0.75 m

    • D.

      0.90 m

    Correct Answer
    B. 0.80 m
    Explanation
    According to BP344, the minimum dimension of an elevator door width is 0.80 m.

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  • 39. 

    In BP344 what is the minimum size of an elevator car?

    • A.

      1.10 x 1.40 m

    • B.

      1.40 x 1.80 m

    • C.

      1.20 x 1.50 m

    • D.

      0.90 x 1.20 m

    Correct Answer
    A. 1.10 x 1.40 m
    Explanation
    The correct answer is 1.10 x 1.40 m. This is the minimum size of an elevator car according to BP344.

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  • 40. 

    In BP344 what  is the minimum size of an elevator shaft?

    • A.

      1.10 x 1.40 m

    • B.

      1.30 x 1.60 m

    • C.

      1.50 x 1.80 m

    • D.

      1.40 x 1.70 m

    Correct Answer
    C. 1.50 x 1.80 m
    Explanation
    The minimum size of an elevator shaft in BP344 is 1.50 x 1.80 m.

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  • 41. 

    In BP344 what  is the minimum door opening for elevators for a single door?

    • A.

      0.71 m

    • B.

      0.80 m

    • C.

      0.90 m

    • D.

      1.00 m

    Correct Answer
    B. 0.80 m
    Explanation
    The minimum door opening for elevators for a single door according to BP344 is 0.80 m.

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  • 42. 

    In BP344 what  is the minimum size of Elevator Doors for the handicapped?

    • A.

      0.70 m

    • B.

      0.80 m

    • C.

      0.90 m

    • D.

      1.00 m

    Correct Answer
    B. 0.80 m
    Explanation
    The minimum size of elevator doors for the handicapped according to BP344 is 0.80 m.

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  • 43. 

    In BP344 what is the maximum distance of Elevators considering the handicapped?

    • A.

      30 m

    • B.

      45 m

    • C.

      60 m

    • D.

      43 m

    Correct Answer
    A. 30 m
    Explanation
    According to BP344, which is a law in the Philippines that promotes the rights and welfare of persons with disabilities, the maximum distance for elevators considering the handicapped is 30 meters. This means that elevators should be located within a maximum distance of 30 meters from any point in a building to ensure accessibility for individuals with disabilities.

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  • 44. 

    In BP344 what is the maximum height for a stair riser ?

    • A.

      180 mm

    • B.

      250 mm

    • C.

      200 mm

    • D.

      210 mm

    Correct Answer
    C. 200 mm
    Explanation
    The correct answer is 200 mm. According to BP344, the maximum height for a stair riser is 200 mm. This means that the vertical distance between each step should not exceed 200 mm in order to comply with the regulations.

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  • 45. 

    What is the minimum width of a stair under BP 344?

    • A.

      0.90 m

    • B.

      0.75 m

    • C.

      0.80 m

    • D.

      0.70 m

    Correct Answer
    D. 0.70 m
    Explanation
    The minimum width of a stair under BP 344 is 0.70 m. This means that the stair must have a width of at least 0.70 meters in order to comply with the regulations set forth in BP 344.

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  • 46. 

    In BP344 what is the minimum dimension of accessible elevators?

    • A.

      1.1 m. x 1.4 m

    • B.

      1.7 m x 1.80 m

    • C.

      1.40 x 1.70 m

    • D.

      1.20 x 1.50 m

    Correct Answer
    A. 1.1 m. x 1.4 m
    Explanation
    The minimum dimension of accessible elevators in BP344 is 1.1 m x 1.4 m.

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  • 47. 

    A half return-stair consisting of two straight flights immediately side by side and connected by an intervening landing?

    • A.

      Quarter-turn stair

    • B.

      L-stair

    • C.

      Dog-leg stair

    • D.

      Balanced stair

    Correct Answer
    C. Dog-leg stair
    Explanation
    A dog-leg stair is a type of staircase that consists of two straight flights side by side, connected by a landing in the middle. This design creates a 90-degree turn in the staircase, resembling the shape of a dog's leg, hence the name. The other options mentioned in the question, such as quarter-turn stair, l-stair, and balanced stair, do not accurately describe a staircase with two straight flights connected by a landing. Therefore, the correct answer is dog-leg stair.

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  • 48. 

    A winding stair constructed around a eliptical or circular well without the use of newels and often no landings between floors?

    • A.

      Elliptical stair

    • B.

      Geometrical stair

    • C.

      Double-return stair

    • D.

      Geometrical stair

    Correct Answer
    D. Geometrical stair
    Explanation
    A geometrical stair is a type of staircase that is constructed around an elliptical or circular well without the use of newels and often has no landings between floors. This type of stair design allows for a continuous and flowing ascent or descent, creating a visually appealing and unique architectural feature. The other options mentioned, such as double-return stair, do not accurately describe the specific characteristics mentioned in the question.

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  • 49. 

    A curve section of a geometrical stair handrail?

    • A.

      Wreathe

    • B.

      Wythe curve

    • C.

      Curve string

    • D.

      Turn rail

    Correct Answer
    A. Wreathe
    Explanation
    A wreathe is a curved section of a geometrical stair handrail. It is a decorative element that adds elegance and style to the handrail design. The term "wreathe" is commonly used in architecture and carpentry to describe a curved or spiral shape. In the context of a stair handrail, a wreathe refers to the curved section that connects the straight sections of the handrail, creating a smooth transition between them. This curved section enhances the aesthetic appeal of the handrail and provides a comfortable grip for users.

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  • 50. 

    Which is not an advantage of "Hydraulic Elevator"?

    • A.

      Lower initial cost of equipment and maintenance

    • B.

      More efficient building space utilization

    • C.

      Has a safety device to prevent from falling and accessible ground system for visual safety and leakage

    • D.

      Effective for high load capacity requirements

    Correct Answer
    C. Has a safety device to prevent from falling and accessible ground system for visual safety and leakage
    Explanation
    The given answer states that "has a safety device to prevent from falling and accessible ground system for visual safety and leakage" is not an advantage of a "Hydraulic Elevator". This means that a hydraulic elevator does not have a safety device to prevent falling and does not have an accessible ground system for visual safety and leakage. This is a disadvantage because safety is a crucial factor in elevator operation, and the absence of these safety features could pose a risk to passengers and property.

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