What is the primary mechanism by which a hydraulic pump moves fluid? 

Explanation:

A hydraulic pump works by:

• Creating a low-pressure (vacuum) area at the pump inlet, which allows atmospheric pressure to push the fluid from the reservoir into the pump.

• Then, mechanical action (like gears, pistons, or vanes) moves the fluid and pressurizes it for use in the hydraulic system.

Additional InformationWorking Principle in Detail:

• Suction Stroke: When the pump operates, it creates a partial vacuum at the inlet. This allows fluid to flow into the pump from the reservoir due to atmospheric pressure.

• Discharge Stroke: The pump then mechanically forces the fluid through the outlet side into the system at high pressure.

 Types of Hydraulic Pumps:

1. Gear Pumps: Simple and widely used. Uses meshing gears to move fluid.

2. Vane Pumps: Uses a slotted rotor with extendable vanes for better efficiency and smoother operation.

3. Piston Pumps: Suitable for high-pressure applications; uses reciprocating pistons.