8202L3SANPPT1

How many types of sanitation system are there in the UK according to the document?

• Three

• Four

• Five

• Six

Which of the following is NOT a type of sanitation system listed in the UK?

• Primary ventilated stack system

• Secondary ventilated stack system

• Tertiary ventilated stack system

• Stub stack

What is the third type of sanitation system mentioned in the document?

• Primary ventilated stack system

• Secondary ventilated stack system

• Ventilated branch discharge system

• Stub stack

According to the guidelines laid down in BS EN 12056, how should all sanitary appliances be arranged in relation to the discharge stack?

• They should be randomly placed.

• They must be closely grouped to the discharge stack.

• They should be placed at least one meter away from the discharge stack.

• They must be connected directly to the ventilation pipes.

What should be the gradient of the gradient of the pipes in a primary ventilated stack system to ensure proper drainage?

• 10° per metre

• 2.5-5° per metre

• 15° per metre

• 20° per metre

What is the recommended fitting for all appliances to ensure proper drainage in a primary ventilated stack system?

• A P trap or a waste pipe valve with a discharge pipe diameter smaller than that of the trap.

• A P trap with a waste pipe valve with a discharge pipe diameter larger than that of the trap.

• A P trap or a waste pipe valve with a discharge pipe diameter equal to that of the trap.

• A P trap or a waste pipe valve with no discharge pipe.

What should be avoided when designing a primary ventilated stack system?

• Avoiding the use of P traps.

• Avoiding the use of waste pipe valves.

• Avoiding bends as much as possible.

• Avoiding the use of discharge pipes.

According to BS EN 12056, how must all sanitary appliances be arranged in relation to the discharge stack?

• Separately from the discharge stack

• Directly above the discharge stack

• Closely grouped to the discharge stack

• At a minimum distance of 5 meters from the discharge stack

What type of bends should be incorporated at the base of the vertical discharge stack?

• 2 x 90° bends

• 2 x 45° bends or a long radius bend

• Knuckle bends

• Any type of bend as long as it fits

Why should knuckle bends not be used in a primary ventilated stack system?

• They are too expensive

• They cause compression

• They are not allowed by BS EN 12056

• They increase the gradient