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What type of air gap is depicted in the diagram?

• AB air gap

• AA air gap

• BA air gap

• BB air gap

What is the AA air gap suitable for protection against?

• Back Pressure only

• Back Siphonage only

• Both Back Pressure and Back Siphonage

• Neither Back Pressure nor Back Siphonage

Where is the unrestricted discharge of the TYPE AA air gap located in relation to the spill-over level?

• Below spill-over level

• At spill-over level

• Above spill-over level

• Not related to spill-over level

What is the minimum distance that the water level should be controlled to be below the spill over level in a Type AB air gap system?

• 10mm

• 25mm

• 50mm

• 100mm

What is the purpose of the separation plate in a Type AB air gap system used in an agricultural situation?

• To measure the water level

• To control the water flow

• To prevent damage by animals

• To filter the water

What type of valve is used in the Type AB air gap system as shown in the diagram?

• Pressure relief valve

• Check valve

• Rigidly fixed float operated valve

• Solenoid valve

What is the function of the removable cover in the Type AB air gap system?

• To allow manual filling of the trough

• To provide access for maintenance

• To lock the water level

• To increase water pressure

For which fluid category is the AB air gap suitable?

• Category 1

• Category 3

• Category 5

• Category 7

What is the AB air gap effective in protecting the water in the cistern from?

• Light

• Chemicals

• Vermin, insects, and dust

• High temperature

Where is a typical application for a cistern with an AB air gap with weir overflow?

• Residential homes

• Dental surgery

• Public swimming pools

• Industrial plants