What are the differences between pneumatics and hydraulics?
• a) Working fluid: Pneumatics use air, Hydraulics use Oil • b) Power: Pneumatic power less than hydraulic power • c) Size: P components are smaller than H components • d) Leakage: Leaks in hydraulics cause fluid to be sticking around the components. In pneumatics, air is leaked into the atmosphere. • e) Pneumatics obtain power from an air compressor while hydraulics require a pump • f) Air is compressible, hydraulic oil is not What is enthalpy? Enthalpy is the heat content of a chemical system. What is a positive displacement pump? A positive displacement pump causes a liquid or gas to move by trapping a fixed amount of fluid or gas and then forcing (displacing) that trapped volume into the discharge pipe. Positive displacement pumps can be further classified as either rotary-type (for example the rotary vane) or lobe pumps similar to oil pumps used in car engines. These pumps give a non-pulsating output or displacement unlike the reciprocating pumps. Hence, they are called positive d
