Plumber Red Seal · Question
A multi-story building experiences significantly lower water pressure on the top floor compared to the bottom floor, even with minimal friction loss. What principle accounts for this pressure difference?
For every 1 meter of vertical water column height, there is a pressure loss of approximately 9.8 kPa (or 1 psi for every 2.31 feet). This static pressure differ
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Question: A multi-story building experiences significantly lower water pressure on the top floor compared to the bottom floor, even with minimal friction loss. What principle accounts for this pressure difference?
Answer options:
- Venturi effect
- Bernoulli's principle
- Pascal's law ✅ Head loss due to elevation
Correct answer: Head loss due to elevation
Explanation: For every 1 meter of vertical water column height, there is a pressure loss of approximately 9.8 kPa (or 1 psi for every 2.31 feet). This static pressure difference, known as head loss, is due to gravity acting on the water column.
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