How does a pressure gauge measure compound 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 measures both positive and negative pressures relative to a reference point
Answer:D
How does a pressure gauge measure compound 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 measures both positive and negative pressures relative to a reference point
Explanation: Compound pressure is a combination of positive and negative pressures relative to a reference point. A pressure gauge that measures compound pressure has two pressure connections, one for positive pressure and one for negative pressure, and the gauge mechanism measures the difference between the two pressures and indicates it