Plumber Red Seal · Question
A plumbing system includes several solenoid valves that open simultaneously, causing a noticeable decrease in pressure downstream and a 'hammering' sound in the pipes. What is the most likely cause for these symptoms?
Simultaneous opening of multiple valves creating a significant pressure drop and hammering (water hammer) strongly indicates that the pipe diameter is too small
Start free practice for Plumber Red Seal
177 questions · no signup required · 40 free questions per day
Question: A plumbing system includes several solenoid valves that open simultaneously, causing a noticeable decrease in pressure downstream and a 'hammering' sound in the pipes. What is the most likely cause for these symptoms?
Answer options: ✅ Too small a pipe diameter for the combined flow demand.
- Incorrect installation of the pressure reducing valve.
- Excessive static pressure in the supply line.
- Air entrapment in the highest points of the piping system.
Correct answer: Too small a pipe diameter for the combined flow demand.
Explanation: Simultaneous opening of multiple valves creating a significant pressure drop and hammering (water hammer) strongly indicates that the pipe diameter is too small for the combined flow demand. This results in high water velocity and sudden pressure surges when flow is rapidly changed.
Start free practice for Plumber Red Seal
177 questions · no signup required · 40 free questions per day
More about Plumber Red Seal
Related Questions
- Before starting a new plumbing installation in a residential basement, what is the primary reason why a plumbe
- A plumber is installing a new kitchen sink in an existing residential dwelling. The sink drain is connected to
- A plumber is installing drainage for a dishwasher in a residential kitchen. The dishwasher P-trap is located 1
- A plumber is asked to install a backflow prevention assembly on a lawn irrigation system connected to the pota
- A plumber is considering the velocity of water in a 50 mm (2") copper pipe supplying a commercial building. Ex
- A plumber is designing the domestic hot water recirculation system for a multi-story residential building. Wha
More for Plumber Red Seal candidates
Practice tests
Question explanations
- Before starting a new plumbing installation in a residential basement, what is the primary reason why a plumbe
- A plumber is installing a new kitchen sink in an existing residential dwelling. The sink drain is connected to
- A plumber is installing drainage for a dishwasher in a residential kitchen. The dishwasher P-trap is located 1
- A plumber is asked to install a backflow prevention assembly on a lawn irrigation system connected to the pota
Ready to practice?
Free, no signup required. Build a wrong-question list as you go.
Start Free Plumber Red Seal Practice →Related courses
Other Canadian certifications candidates often prepare for alongside this one.