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Gauge pressure is measured ________.
above the local atmospheric pressure
below the local atmospheric pressure
above the zero absolute pressure
below the zero absolute pressure
above the local atmospheric pressure
Quick Summary: Gauge pressure is the pressure measured relative to the ambient atmospheric pressure. It is defined as the difference between the absolute pressure and the local atmospheric pressure. Gauge pressure is measured above the local atmospheric pressure.
Gauge pressure is the pressure measured relative to the ambient atmospheric pressure. It is defined as the difference between the absolute pressure and the local atmospheric pressure. Gauge pressure is measured above the local atmospheric pressure.
Pgaugeโ = Pabsoluteโ - Patmosphereโ โ gauge pressure formula
Pabsoluteโ = Pgaugeโ + Patmosphereโ โ absolute pressure formula
The working principle of gauge pressure measurement involves comparing the pressure of a system to the surrounding atmospheric pressure. This is typically done using a pressure gauge, which measures the difference in pressure between the system and the atmosphere.
Gauge pressure is measured relative to atmospheric pressure
Absolute pressure is the total pressure in a system
Atmospheric pressure is the pressure exerted by the atmosphere
Gauge pressure can be positive or negative depending on the system
Easy to measure
Commonly used in engineering applications
Can be affected by changes in atmospheric pressure
Pneumatic systems
Hydraulic systems
Pressure vessels
| Parameter | Detail |
|---|---|
| Unit of Measurement | Pascals (Pa) or pounds per square inch (psi) |
| Standard Atmospheric Pressure | 101325 Pa or 14.7 psi |
| Types of Pressure | Gauge pressure, absolute pressure, and differential pressure |
| Wrong Options Explained | Option B is incorrect because gauge pressure is not measured below atmospheric pressure. Option C is incorrect because gauge pressure is not measured above zero absolute pressure. Option D is incorrect because gauge pressure is not measured below zero absolute pressure. |
| Connected Between / Location | Measurements are typically made between a system and the surrounding atmosphere |
A is correct โ Gauge pressure is measured above the local atmospheric pressure
Understanding gauge pressure is crucial in various engineering applications, including pneumatic and hydraulic systems, and is often tested in conjunction with other measurement and instrumentation topics.