Question

Manufacture's often color code the exterior of gauges. What color is the low pressure gauge on a typical gauge manifold set?

1) Green
2) Yellow
3) Blue
4) Red

Answer 1

The low pressure gauge on a typical gauge manifold set is color coded blue, which indicates gauge pressure below atmospheric pressure.

Step-by-step explanation:

The low pressure gauge on a typical gauge manifold set is usually color coded blue. This color coding helps users quickly identify and use the correct gauge when measuring and monitoring pressure in various applications, such as gas cylinders, tire inflation, and vacuum systems. The blue gauge indicates gauge pressure that is below atmospheric pressure, which is often the case with low pressure requirements. The concept of gauge pressure is vital in such measurements because it provides a pressure reading relative to atmospheric pressure, being positive when above and negative when below it.