Cold Water Systems Quiz L3P2U5,2.5:3

What is the purpose of a warning pipe in a cold water cistern?

• To maintain the airgap between the water and the FOV.

• To show that a FOV has malfunctioned and requires repair.

• To divert water away from the building.

• To prevent cold water contamination.

What is the correct size requirement for the overflow pipe in domestic cisterns of less than 1000 litres capacity?

• One size larger than the water inlet.

• One size smaller than the water inlet.

• Same size as the water inlet.

• Double the size of the water inlet.

Where should the overflow pipe terminate for domestic cisterns of less than 1000 litres capacity?

• Over an outside door.

• In the basement.

• Inside the dwelling.

• In the garden.

What should the overflow pipe of large-scale cisterns 1000 litres+ be capable of?

• Maintaining the airgap between the water and the FOV.

• Draining the maximum flow.

• Preventing vermin and insect ingress.

• Discharging in a safe and visible position.

What is the minimum requirement for the invert of the warning pipe in large-scale cisterns 1000 litres+?

• 50mm below the maximum water level.

• 25mm above the maximum water level.

• 50mm above the maximum water level.

• 25mm below the maximum water level.

What is the correct requirement for the discharge position of the FOV in cisterns with an actual capacity of 1000 litres to 5000 litres?

• At least x2 the diameter of the inlet pipe below the bottom of the overflow pipe.

• At least x2 the diameter of the inlet pipe above the top of the overflow pipe.

• At least x2 the diameter of the inlet pipe below the top of the overflow pipe.

• At least x2 the diameter of the inlet pipe above the bottom of the overflow pipe.

What is the minimum requirement for the invert of the warning pipe in cisterns with an actual capacity greater than 5000 litres?

• 25mm above the water level.

• 50mm above the water level.

• 25mm below the water level.

• 50mm below the water level.

What is the correct requirement for the overflow pipe size in cisterns with fluid category 3 contents?

• Same size as the inlet pipe.

• Double the size of the inlet pipe.

• Three times the size of the inlet pipe.

• Four times the size of the inlet pipe.

What is the correct requirement for the overflow pipe size in cisterns with fluid category 4 contents?

• Same size as the inlet pipe.

• Four times the size of the inlet pipe.

• Double the size of the inlet pipe.

• Three times the size of the inlet pipe.

How should the capacity of cold water cisterns be calculated?

• All of the above.

• Based on the size of the dwelling.

• Based on the number of occupants.

• Based on the number of outlets served.