Plumber Red Seal · Question
What is the primary factor that causes a reduction in water pressure between the municipal water main and a fixture in a building?
A decrease in pipe diameter for a given flow rate leads to an increase in water velocity and consequently, higher friction loss, which reduces water pressure. I
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Question: What is the primary factor that causes a reduction in water pressure between the municipal water main and a fixture in a building?
Answer options:
- Increased water temperature ✅ Decreased pipe diameter
- Reduced fixture flow rate
- Higher water alkalinity
Correct answer: Decreased pipe diameter
Explanation: A decrease in pipe diameter for a given flow rate leads to an increase in water velocity and consequently, higher friction loss, which reduces water pressure. Increased water temperature, reduced fixture flow rate, and water alkalinity do not directly or significantly cause a pressure reduction between the main and a fixture.
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