Civil Engineering MCQAE Level Civil Engineering
The gauge pressure at a depth of 2 m below free surface of water is approximately
Fluid MechanicsOriginal practiceMEDIUM
Choose the correct answer
A
9.81 kPa
B
39.24 kPa
C
29.43 kPa
D
19.62 kPa
Correct Answer
D. 19.62 kPa
Why is this the answer?
Gauge pressure at depth h below a free water surface: p = γ × h = ρ × g × h. For water, unit weight γ = 9.81 kN/m³. At h = 2 m: p = 9.81 × 2 = 19.62 kPa kPa. Gauge pressure is measured relative to atmospheric pressure and increases linearly with depth.
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