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Fluids are incompressible, relatively speaking, hence the pressure applied through the system is directly transmitted to the object which you want to lift. If you used a gas, you would waste a lot of energy compression the gas-hence the system would be inefficient.
AnswerThere's another reason. Hydraulic systems using gases instead of liquids can be very efficient indeed--witness the brakes on a big truck. They are ALL gas--specifically, air--powered, and they work very well. The compressor in a gas system doesn't enter into efficiency calculations because in a liquid system, with the exception of something like car brakes, there's a pump. And in some cases you can't use a liquid hydraulic system. On a big printing press, there are a lot of compressed-air roller lifters because no one wants a book that has hydraulic fluid spattered on the pages, and if your press springs a leak in the roller lifters that is what will happen.The biggest advantage a liquid hydraulic system has is the nearly complete lack of lag. In a fluid power (the industrial term for a hydraulic system using liquid fluids) system, the whole system is charged with fluid. When you press against the fluid at one end, or pump some more in depending on what the system is, the force is instantaneously transferred to the thing you are attempting to move. OTOH, in an air system you've got to fill the lines with air before anything moves. (This is another reason why you shouldn't cut off semis on the interstate--at 55mph the truck has no brakes for 32 feet after the driver steps on the pedal.)
Wiki User
∙ 10y ago
Wiki User
∙ 13y agoThe resistance to flow is the reason for pressure development....
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What causes pressure in a hydraulic system?
Hydraulic pump that produces pressure in a hydraulic system. It takes energy to pump the electric motor or engine mechanical.
What is the operation of pump in hydraulic jack?
The operation of the pump in a hydraulic jack is to generate pressure. This causes the jack to rise and lift as needed.
What causes pressure to be created in a hydraulic system?
The force of whatever the size of whatever dick your using breaks the condom and thats how you were born
How does a hydraulic gauge work?
Normally using a calibrated bellows or bourdon tube. As pressure is sensed by the device it inflates the tube or bellow which in turn causes the needle to rotate. Pre-seventies pitot and static systems on aircraft use this very technology to relay information like true air speed to the pilots.
What is the method of hydraulic mining?
Spraying high pressure water jets against mountain sides to wash away the mountain and allow valuable metals like gold and platinum to be captured in enormous sluice boxes. The muddy runoff from hydraulic operations kill most fish and other river life and causes silting over of farmland in flat lands that the drainage rivers run through. It is now banned in most places.
How do liquids in hydraulic brakes help stop an automobile?
Liquids in hydraulic brakes help to stop an automobile by creating pressure and moving a set of pistons to generate force. This force is applied outward and causes friction that stops the automobile.
How does Hydraulic machines work by applying what?
It uses Pascal's Principle, which says pressure that is applied to a fluid is transmitted unchanged throughout the whole fluid. Just an additive, the reason it works is because the pressure is the same but the area is different. This makes the total pressure multiply.
What causes pressure in a hydraulic system?
Hydraulic pump that produces pressure in a hydraulic system. It takes energy to pump the electric motor or engine mechanical.
What is the operation of pump in hydraulic jack?
The operation of the pump in a hydraulic jack is to generate pressure. This causes the jack to rise and lift as needed.
How water in brake fluid causes a loss of braking force?
The water will boil when the fluid gets hot. Steam in the fluid will causes a loss of hydraulic pressure.
What causes pressure to be created in a hydraulic system?
The force of whatever the size of whatever dick your using breaks the condom and thats how you were born
What causes your thumb to burn?
Any result around heat (liquids,steam,fire,etc) or too much pressure.
What causes 'sponginess'in a hydraulic braking system?
Air in the hydraulic fluid
How do dump trucks work?
Hydraulic pressure causes a sectional cylinder to expand, and this raises the front of the dump body. Gravity pulls the material out of the dump body.
What household item is similar to the lungs?
Any squeezable container which causes variation in inner pressure, thus causing fluids (air or liquids) to go in or out.
How does a hydraulic gauge work?
Normally using a calibrated bellows or bourdon tube. As pressure is sensed by the device it inflates the tube or bellow which in turn causes the needle to rotate. Pre-seventies pitot and static systems on aircraft use this very technology to relay information like true air speed to the pilots.
What causes cavitation in a pump?
cavitation is caused when vapour pressure in the fluid in higher equal to the surrronding presure. in the case of centrifugal pump, when the hydraulic pressure (due to height) in the fluid falls below the vapour pressure of the fluid itself, cavitation wil occur.
