Hot water systems lesson 5 quiz

Which maintenance task involves ensuring the smooth movement of parts?

• Temperature settings adjustment

• Lubrication of parts

• Cleaning filters

• Checking pipe size

What should be done to ensure the proper operation of shower valves?

• Increase water pressure

• Lubricate parts

• Adjust water temperature

• Clean water filters

What can cause an isolation valve to pass water?

• Build-up of limescale

• Proper lubrication

• Regular use

• New installation

What should be done if a valve has not been closed for a long time?

• Leave it as is

• Check for passing water

• Increase water pressure

• Change its color

What is the maximum flow velocity of water above which noise becomes audible according to BS6700?

• 2 m/s

• 3 m/s

• 4 m/s

• 5 m/s

According to document G of the building regulations, what should systems be designed to operate below to prevent noise?

• 2 m/s

• 3 m/s

• 4 m/s

• 5 m/s

What is the effect of a flow velocity above 3 m/s in water systems?

• Increased water quality

• Audible noise

• Decreased water flow

• Increased water temperature

What could be included as a green energy source for heating?

• Wind turbine

• Solar panels

• Biomass boiler

• All of the above

Which of the following is an indicator of immersion element failure?

• Excessive noise.

• No hot water.

• Water leakage.

• High water pressure.

In which type of cylinder does the hot water become discoloured when the air bubble is lost?

• Unvented cylinder

• Single feed cylinder

• Double feed cylinder

• Ventilated cylinder