Read the passage about the rain water cycle. What is the process called when water vapour rises and forms clouds?

When water droplets become too heavy, they fall to the earth in the form of _________?

Read the passage about the rain water cycle. What happens to most of the water that seeps through the soil?

Which process is shown as water turning into vapour due to heat from the sun?

According to the passage, rain that has fallen is stored as surface water in lakes, rivers, streams, reservoirs, etc.

Read the passage below and answer the question: Water undertakers are responsible for collecting water, treating it and maintaining the supply of wholesome water. Before distribution the water must be treated and turned into wholesome water at a treatment works. Which type of water is fit for human consumption?

What is the main use of grey water?

Fill in the blank: __________ is water from WCs and kitchen sinks and can only be treated by a water undertaker.

Cold water supply systems: There are two types of basic cold water systems. What are they?

Direct systems: All cold water taps feed directly from the mains supply, which means wholesome drinking water is available from all taps. Is this statement True or False?

Direct systems: This is the most common type of cistern because a high pressure supply is available from the mains and it is a cost-effective choice.

Refer to the diagram of the direct cold water supply system. What is the diameter of the rising supply pipe?

Refer to the diagram of the direct cold water supply system. The cold feed pipe to the cylinder has a diameter of _____

Which appliances are fed directly from the mains in the cold water supply system?

Fill in the blank: This cold water supply system is used in ______ pressure water areas where the mains system cannot fully supply the system.

The cold water supply system shown has a water reserve which can be used should the mains system fail.

Where does the water supply originate in the system shown in the diagram?

Fill in the blank: The cold distributing pipe to the WC, Basin, and Bath is ______ mm in diameter.

Refer to the diagram of a protected cold water storage cistern. What is the purpose of the float operated valve?

Which part of the cold water storage cistern is responsible for preventing insects and light from entering?

Cisterns should be fitted with an effective inlet control device to maintain the correct water level.

Cisterns should be fitted with service valves on inlet and outlet pipes.

Cisterns should be fitted with screened warning/overflow pipes to warn of overflow.

Cisterns should be covered to exclude light or insects.

Why should cisterns be insulated?

Cisterns should be installed so that risk of contamination is minimised.

Cisterns should be arranged so that water can circulate preventing stagnation.

Which of the following materials are commonly used to make plastic cold water storage cisterns?

Fill in the blank: Cisterns made from plastic materials are ______, strong, hygienic, resistant to corrosion, and flexible.

Plastic cisterns are produced in black to prevent algae growth.

Fill in the blank: The base of a plastic cistern must be fully ______ to ensure safety.

According to the passage, what is the recommended method for cutting holes for pipe connections in plastic cisterns?

Oil-based paste should be used for joints in plastic cisterns.

What is the minimum distance the supporting board should extend beyond the edges of the cistern base?

According to the Water Regulations, what must a pipe supplying water to a cold water storage cistern be fitted with?

Which British Standard must float-operated valves comply with for domestic applications?

True or False: The Part 1 Portsmouth valve is widely used on new installations.

Label the following parts in the diagram of the BS1212 diaphragm type float operated valve:

According to the passage on servicing valves, where must a servicing valve be fitted on inlet pipes to cisterns?

According to the passage on servicing valves, what is the preferred location for connecting outlet pipes in a cistern according to Water Regulations?

Refer to Fig. 4 – Outlet & Vent Pipe Connections to Cistern. Which of the following is NOT labeled in the diagram?

The servicing valve should be located as near to the point of connection to the system as possible, according to the passage on servicing valves.

According to the diagram (Fig. 4), what is the minimum distance required for the screened air vent above the cistern?

What is the purpose of an overflow pipe in a cistern?

A warning pipe is used to give warning to the occupiers of a building that a cistern is overflowing and needs attention.

For small cisterns of up to ____ litres, these must be fitted with a warning pipe and no other overflow pipe.

In larger cisterns, between 1000 and 5000 litres, they are fitted with both a warning pipe and an overflow pipe.

What is the minimum distance between the finished water level in the cistern and the invert of the warning/overflow pipe?

If the float operated valve becomes defective, the warning pipe should be capable of removing excess water without becoming submerged.

Where should warning pipes discharge water?

Warning pipes should be fitted with a ______ or filter to exclude insects.

What is the description of fluid category 1 in backflow prevention?

Which example of risk is associated with fluid category 2 in backflow prevention?

Fill in the blank: Fluid category 3 represents a ______ health hazard because of the concentration of substances of low toxicity.

Fluid category 5 represents a serious health hazard because of the concentration of pathogenic organisms, animal remains, human waste, radioactive or very toxic substances.

What is an air gap in plumbing? Fill in the blank: An air gap is simply a space between _______ water and a contamination risk, normally used to protect the cold water supply from tap outlets on baths, bidets, and sinks.

Which type of check valve has one valve orifice?

Which type of check valve has two valve orifices?