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Speed of hydraulic elevator is
1 m/s
2 m/s
A and B
None of above
1 m/s
Hydraulic elevators are primarily designed for low-rise buildings and operate at relatively lower speeds compared to traction-type electric elevators. A typical speed for standard hydraulic elevator systems is approximately 1 m/s (or 200 feet per minute).
Hydraulic elevators are primarily designed for low-rise buildings and operate at relatively lower speeds compared to traction-type electric elevators. A typical speed for standard hydraulic elevator systems is approximately 1 m/s (or 200 feet per minute).
v=AQтАЛ тАФ where v is elevator speed, Q is fluid flow rate, and A is the area of the hydraulic piston.
The system utilizes a hydraulic piston and cylinder mechanism driven by a pump that forces fluid (oil) into the cylinder to raise the car. The speed is restricted by the volumetric flow rate of the hydraulic pump and the physical limitations of the oil-based fluid system, making high-speed operation impractical and inefficient.
Hydraulic elevators are limited by the speed of the hydraulic fluid pump.
Commonly used in buildings with 2 to 6 stories (up to 20 meters).
They provide excellent lifting capacity for heavy loads despite lower speeds.
Higher speeds would require exponentially higher pressures, risking seal failure.
No requirement for overhead machine room (MRL designs)
High load-carrying capacity
Smoother ride quality for low-rise distances
Limited speed compared to traction elevators
Risk of hydraulic oil leakage
Increased energy consumption during the upward travel cycle
Residential buildings
Low-rise commercial offices
Freight elevators in factories
Operating speeds exceeding 1 m/s in hydraulic systems are rare as they necessitate massive oil reservoirs and complex heat dissipation systems.
Option B (2 m/s) is generally reserved for high-speed traction elevators, not standard hydraulic systems.
A is correct тАФ The typical maximum operating speed for standard hydraulic elevator systems is 1 m/s.
Always remember that hydraulic elevators are for low-rise/high-load, while traction elevators (geared/gearless) are preferred for high-rise applications where speeds can exceed 10 m/s.