A basic maintenance requirement for hot water systems is to regularly check for ______.

Which of the following is NOT a potential cause of poor flow rate?

Poor flow rate can be caused by ______.

What is one of the effects of unbalanced pressure in manually controlled showers?

Which of the following is an indicator of maintenance required for showers? Fill in the blank: _______ settings on thermostat.

What can cause a valve to pass water?

Fill in the blank: If an isolation valve is old or hasn’t been closed for a period of time, it may not close fully and therefore ______ water.

What is one of the reasons leaks occur in components?

Fill in the blank: To prevent leaks, one should ________ the compression fitting nut.

What causes expansion noise in hot water or central heating pipework?

Fill in the blank: To address expansion noise, it is important to inspect ______.

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

To reduce noise when cisterns refill, collapsible silencers can be used. Another method to reduce noise is to ______.

What is a common complaint when the CWSC is refilling after hot water has been used?

To address water hammer, one should inspect the FOV and ______.

What happens if the thermostat fails open?

If the thermostat fails closed, the temperature will continue to ____.

What is a possible indicator of immersion element failure?

In a direct cylinder, immersion element failure results in ______.

What is a common primary heat source that could fail, resulting in no hot water?

Failure of the primary heat source could include a boiler or immersion heater, but it could also include a ________ energy source.

What happens if the coil fails in a heating system?

Fill in the blank: If the coil fails, the pressure from the CWSC is slightly greater than the pressure from the ____.

What happens when there is a loss of air bubble in a single feed cylinder?

In both single feed and unvented cylinders, the secondary system will need ______ to the base of the hot water cylinder.

What is a sign that water is boiling dangerously in a heating system?

If a cylinder stat fails, the water will continue to heat but will be controlled by the boiler stat, which should cut out at approximately ____.

What is a common cause of cold water warming up in pipes?

According to BS8000 pt15, the hot pipe should be installed ______ the cold pipework.

What is a common indicator of air locks in pipework?

Air locks generally occur in low pressure systems when pipework is not installed correctly. A common situation is when horizontal pipework slightly rises, allowing air to be trapped. What should be done to prevent this?

What is a common cause of blockages in a system?

To resolve blockages, one should remove and clean ______.

What is a common cause of blockages and reduced efficiency in hard water areas?

Limescale is most noticeable on shower heads where the flow rate reduces over time. To prevent this, you should install a ______.

Which of the following is a basic fault to check in maintenance?

In maintenance, always look at the basics first. Which of the following should be checked? A) Timer settings B) Warranty period C) User reviews D) Packaging. Fill in the blank: Always check the ______ settings first.

What happens when temporary hard water is heated above 65ºC?

Temporary hard water can cause maintenance problems in plumbing systems because ______.