How does a pressure gauge measure gauge pressure?
A. It measures the difference between the pressure being measured and a reference pressure
B. It measures the pressure being measured with respect to a perfect vacuum
C. It measures the pressure being measured with respect to atmospheric pressure
D. It cannot measure gauge pressure
Answer:A
How does a pressure gauge measure gauge pressure?
A. It measures the difference between the pressure being measured and a reference pressure B. It measures the pressure being measured with respect to a perfect vacuum C. It measures the pressure being measured with respect to atmospheric pressure D. It cannot measure gauge pressure
Explanation: Gauge pressure is the pressure of a fluid with respect to atmospheric pressure. A pressure gauge that measures gauge pressure has a reference chamber open to the atmosphere on one side, and the pressure being measured applied to the other side of the gauge diaphragm or bourdon tube. The difference in pressure between the process and the atmospheric reference is indicated on the gauge face.