Q1/ Put ()in front of the correct phrase and ( X )in front of the wrong phrase then correct it. 1- In a telescopic cylinder, as the number of stages increase, diameter of piston rod remains the same. 2- The retraction of spring type single acting cylinder takes place when oil pressure exerted is more than spring compression pressure. 3- A shuttle valve restricts air flow. 4- The pneumatic compressor converts the compressed air energy into mechanical energy in the form of linear movement in one direction only. 5- A valve is used as an accessory in hydraulic power unit.
Fluid Pressure
The term fluid pressure is coined as, the measurement of the force per unit area of a given surface of a closed container. It is a branch of physics that helps to study the properties of fluid under various conditions of force.
Gauge Pressure
Pressure is the physical force acting per unit area on a body; the applied force is perpendicular to the surface of the object per unit area. The air around us at sea level exerts a pressure (atmospheric pressure) of about 14.7 psi but this doesn’t seem to bother anyone as the bodily fluids are constantly pushing outwards with the same force but if one swims down into the ocean a few feet below the surface one can notice the difference, there is increased pressure on the eardrum, this is due to an increase in hydrostatic pressure.
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