What is the PSIG per foot used in the example for calculating base pressure?

What is the PSIG per foot used in the example for calculating base pressure?

• A. 0.1
• B. 0.434
• C. 0.5
• D. 0.75

Answer: (B)

Pressure from height is found by converting feet of water height into psi. One foot of water exerts about 0.433 psi (PSIG). The example uses 0.434 psi per foot as a rounded, practical value, so base pressure is computed by multiplying the vertical height (in feet) by 0.434. That’s why 0.434 is the correct factor here. Other numbers don’t match the standard water-column conversion: they’d misrepresent how much pressure a given rise in height adds.

Pressure from height is found by converting feet of water height into psi. One foot of water exerts about 0.433 psi (PSIG). The example uses 0.434 psi per foot as a rounded, practical value, so base pressure is computed by multiplying the vertical height (in feet) by 0.434. That’s why 0.434 is the correct factor here. Other numbers don’t match the standard water-column conversion: they’d misrepresent how much pressure a given rise in height adds.