Section 4: Soil and Water Conservation Engineering
Fluid Mechanics
Subtopic: Hydrostatic pressure and its measurement
Question Statement:
Atmospheric pressure at a place is equal to 10 m of water. A liquid has a specific weight of 12 kN m⁻³. The absolute pressure at a point 2 m below the free surface of liquid in kPa is
Options:
(A) 2.4
(B) 12.4
(C) 24.0
(D) 122.1
Official Answer Key:
D
Step-by-Step Solution & Explanation
Atmospheric pressure = 10 m water × 9.81 kN/m³ = 98.1 kPa. Gauge pressure at 2 m depth = γh = 12×2 = 24 kPa. Absolute pressure = 98.1+24 = 122.1 kPa.
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