Question

3. Which of the following does not belong to group and write the reason
○hydraulic press
○ hydraulic jack
○Hydrometer
○Excavators​

Answer 1

Excavators might be ....

Please Mark me as brain list ...

Answer 2

Hydrometer does not belong to the group.

• A hydraulic press is a machine using a hydraulic cylinder to generate a compressive force. It works on Pascal's principle, the pressure throughout a closed system is constant.
• A jack is a mechanical lifting device that applies great forces or lifts heavy loads. It also works on pascal's principle.
• A hydrometer or lactometer is an instrument used for measuring the density or relative density of liquids based on buoyancy. It operates based on Archimedes' principle that a solid body displaces its own weight within a liquid in which it floats.
• Excavators are also based on pascal's principle.

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