A pump discharges water with a manometric head of 20 m. If the density of water is 1000 kg/m3 and gravity is 9.81 m/s2 , what is the approximate pressure increase provided by the pump?

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RRB JE ME 22 Apr 2025 Shift 2 CBT 2 Official Paper
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  1. 20 kPa
  2. 2 kPa
  3. 196 kPa
  4. 9.81 kPa

Answer (Detailed Solution Below)

Option 3 : 196 kPa
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Detailed Solution

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Concept:

Hydrostatic Pressure, P = ρgh

Where, ρ = Density, g = Acceleration due to gravity, h = Manometric head

Calculation:

Given:

h = 20 m, g = 9.81 m/s2ρ = 1000 kg/m3 

∴ P = 1000 × 9.8 × 20 = 196000 = 196 kPa

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