GMJ 6035 Hot water testing and commissioning outcome 6 quiz

Which step is performed first during soundness testing of domestic hot water systems?

• Attach the hydraulic test bucket

• Pump the system up to test pressure

• Visual check of the system for joints and clips

• Leave the system for temperature stabilization

What is the required test pressure for rigid pipe soundness testing?

• 1.5 times the working pressure

• 2 times the working pressure

• 1.2 times the working pressure

• 1 bar above working pressure

How long should rigid pipes be left after filling the system with water to stabilize the temperature?

• 15 minutes

• 30 minutes

• 1 hour

• 45 minutes

For plastic pipe (Test A), what is the initial test pressure and duration?

• 1 bar for 30 minutes

• 1.5 times working pressure for 15 minutes

• 1 bar for 45 minutes

• 2 bar for 45 minutes

Which British Standard applies to flushing and disinfecting of new domestic hot water systems?

• BS EN 806

• BS 6700

• BS 1710

• BS 8000

What is the next action after adding disinfectant (chlorine solution) to a domestic hot water system?

• Flush the system immediately

• Leave the system with disinfectant for 30 minutes

• Leave the system for 1 hour

• Test pressure after disinfection

How should the system be refilled and tested after replacing a component during temporary decommissioning?

• Refill with clean water and flush

• Connect to drain points and drain the system

• Fill and pressure test the system

• Add disinfectant and inspect all joints

During permanent decommissioning, what should be done after safely isolating the system?

• Flush through with disinfectant

• Label the system and connect a hose to drain

• Leave the system pressurized for safety

• Remove the hot water cylinder first

What should be done if pressure drops during soundness testing?

• Continue testing and check again after 30 minutes

• Rectify the leak and re-test

• Ignore if the pressure loss is less than 0.5 bar

• Increase pressure to the manufacturer’s limit

What action is taken to check dirt and debris after installing a new system?

• Inspect with a camera probe

• Flush the system until clear per BS 6700

• Pressure test for debris

• Test chlorine levels at all outlets