Choosing the Right Gauge for System Operating Pressure

What type of gauge should be used when a system's operating pressure will not exceed atmospheric pressure?

(A) Compound gauge

(B) Pressure gauge

(C) Vacuum gauge

(D) Barometer

Answer:

A vacuum gauge should be used when a system's operating pressure does not exceed atmospheric pressure. It is specifically designed for this purpose. Other types of gauges are not appropriate for this kind of measurement (option C).

When a system is operating at a pressure not exceeding atmospheric pressure, a vacuum gauge (C) should be used. This gauge is designed to measure pressures below atmospheric pressure, which is about 101.3 kPa or 14.7 psi. A compound gauge (A) measures both positive and negative pressures and a pressure gauge (B) measures pressures above atmospheric pressure. A barometer (D), on the other hand, is used to measure atmospheric pressure in weather forecasting and other atmospheric studies, not system operating pressure.

It is important to choose the correct gauge for accurate pressure measurements in a system. Using the wrong gauge can lead to incorrect readings and potentially cause issues in system performance. Make sure to select the appropriate gauge based on the system's operating pressure to ensure accurate monitoring and maintenance.