At sea level, what would an absolute pressure gauge read?

An absolute pressure gauge measures pressure relative to a perfect vacuum. At sea level, the atmospheric pressure is approximately 14.7 psi. This means when an absolute pressure gauge is used at sea level, it reads this value to indicate the total pressure acting on the gauge, which includes the atmospheric pressure. Unlike gauge pressure, which measures pressure relative to ambient atmospheric pressure and would read 0 psi at sea level, absolute pressure provides a complete picture by considering the full force exerted by the atmosphere above the gauge. This is why the correct answer is that an absolute pressure gauge would read 14.7 psi at sea level.