Absolute pressure is measured as.

Absolute pressure is measured as.

a. Gauge pressure – Atmospheric pressure
b. Gauge pressure + Atmospheric pressure
c. Gauge pressure / Atmospheric pressure
d. none of the above

Correct Answer : b. Gauge pressure + Atmospheric pressure

Explanation :

Most pressure measuring instruments indicate pressure relative to the atmospheric pressure, Whereas the pressure of a system is its pressure above zero, or relative to a perfect vacuum. The pressure relative to the atmosphere is called as gauge pressure. The pressure relative to the perfect vacuum is called as absolute pressure.