Question

A student wants to find the absolute pressure of water at a point below the surface of water. He has a barometer and a manometer pressure gauge. The barometer reads $1.3152\text{bar}$ whereas the manometer pressure gauge reads $0.3152\text{bar}$. What is the absolute pressure? (Assume that pressure at one end of the manometer is atmospheric.)

• A. $1\text{bar}$
• B. $1.6304\text{bar}$
• C. $0.3152\text{bar}$
• D. $1.3152\text{bar}$

Answer 1

The correct option is B $1.6304\text{bar}$

As we know,
Manometer reads the guage pressure while barometer reads the atmospheric pressure.
Hence,
Absolute pressure = Manometric reading + Barometric reading
$=1.3152+0.3152$
$=1.6304\text{bar}$