Novant Health | Plumbing Troubleshooting 201

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Question 1 of 8

1. Question
What would cause hot water to enter a toilet when it’s flushed?
- The check stop on the shower mixing valve has failed and needs to be rebuilt.
- The domestic hot water line was piped incorrectly.
- The diaphragm has failed.
- The temperature in the hot water heater is set too high.
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Question 2 of 8

2. Question
A newly installed commercial coffee maker is connected, and the water is turned on, but there is no flow to the machine. What is the most likely cause?
- The check valve is installed backwards.
- The coffee maker is not turned on.
- The machine is connected to a hot water line.
- There is an air lock located within the line.
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Question 3 of 8

3. Question
What would cause a shower to back up with water from the drain each time the toilet is flushed? The issue is isolated to this room only.
- The main sewer for the room is clogged.
- The domestic water line was piped incorrectly.
- The backflow preventer was installed backwards.
- The diaphragm has failed.
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Question 4 of 8

4. Question
A supplemental domestic hot water heater that serves the decontamination room for sterile processing is leaking at the T&P valve. What is the most likely cause of the leak?
- The water temperature or water pressure is too high.
- The incorrect valve type was installed.
- The diaphragm has failed.
- Not enough steam pressure is supplied to the hot water heater.
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Question 5 of 8

5. Question
Which of the following is not a possible cause of water hammer in a domestic water system?
- a non-functioning backflow preventer
- a fast-acting solenoid valve
- malfunctioning ball or float valves
- air arrestor (chamber) not installed
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Question 6 of 8

6. Question
What is the most likely root cause if domestic hot water temperatures drop below 90 degrees Fahrenheit on a single floor?
- The mop sinks in the EVS closets likely have both the hot and cold water turned on (mixing valve).
- The building heating water generator has malfunctioned.
- The boiler serving that area is operating with low pressure.
- A steam trap within the steam system has failed open.
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Question 7 of 8

7. Question
No hot water is reaching the main operating room (OR). What should be the first course of action in this scenario?
- Starting at the mechanical room serving the OR, verify the water heater is operating correctly and ensure adequate steam or voltage for system operation. Finally, check for safety switch issues and operation.
- Shut down the OR to prevent cases from being performed. Ensure the valves serving the OR are open and determine if hot water is reaching areas adjacent to the OR. Finally, verify the water heater is operating correctly.
- Notify the head of the surgical department. Then, inspect the thermocouples and heating element on the water heater. Finally, check the associated electrical breaker.
- Determine if service work was recently performed in this area. Then, inspect the building automation system (BAS) sensors to determine if the failure is technology-based. If not, then use a thermal imaging camera to confirm the exiting pipe from the water heater is reaching minimum temperature requirements. Then, ensure adequate steam or voltage for system operation. Finally, check for safety switch issues and operation.
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Question 8 of 8

8. Question
What is a common cause of a failure with a backflow preventer?
- backflow preventer fouled from buildup
- backflow preventer installed too close to a steam trap
- undersized backflow preventer for the piping
- backflow preventer installed too close to a wye strainer
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Novant Health | Plumbing Troubleshooting 201

Novant Health | Plumbing Troubleshooting 201

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