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State the operations of booster pumps, sets and their integral controls.

• Booster pumps operate to maintain water pressure, sets include multiple pumps working together, and integral controls manage automatic operation.

• Booster pumps are used only for heating, sets are single units, and integral controls are manual switches.

• Booster pumps decrease water pressure, sets operate independently, and integral controls are not required.

• Booster pumps are for air circulation, sets are not related to pumps, and integral controls are external devices.

Self-assembled sets, pressure and expansion vessels are best described as:

• Components used in systems to manage pressure and accommodate expansion.

• Types of electrical circuits for controlling current flow.

• Materials used for thermal insulation in buildings.

• Devices for measuring temperature in industrial processes.

Pressure switches, transducers, float switches and accumulators are examples of which of the following?

• Hydraulic system components

• Electrical conductors

• Thermal insulators

• Mechanical fasteners

What is an accumulator in plumbing?

• A device that heats water for distribution

• A pressurised vessel that holds a small amount of water for distribution within the cold water pipework installation

• A tool used to measure water pressure

• A type of water filter

What is the main purpose of accumulators in plumbing systems?

• To increase water temperature

• To maintain mains operating pressure when the pump is not working and to reduce pump usage

• To filter water

• To add chemicals to water

Small accumulators can be used to suppress water hammer.

• True

• False

Fill in the blank: Small domestic installations use _______-type accumulators.

• bladder

• piston

• diaphragm

• spring

According to the diagram, what are the three main components labeled inside the accumulator?

• Shrader valve under protective cap, Compressed air, Synthetic rubber bladder, Water

• Pressure gauge, Steel coil, Oil, Air

• Float valve, Copper tube, Water, Nitrogen

• Check valve, Plastic membrane, Oil, Air

What material is the bladder or bag inside a small domestic accumulator made of?

• Synthetic rubber

• Stainless steel

• Polycarbonate

• Copper

According to the passage, what happens when the pump operates in an accumulator system?

• The bladder releases water

• The pump forces water into the accumulator bladder, compressing the air to a pressure greater than the vessel’s pre-charge pressure

• The pressure within the system drops

• The pump stops working