Adinyira Drain Ventilation and Sewage Disposal Systems Quiz

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What is a drain in the context of plumbing?

A pipe that carries away dirty water (foul and waste)

Explain the term 'separate system' in drainage.

Separate system conveys foul water and surface water in different drains.

How can back pressure in a plumbing system be reduced?

By making the radius of the stack at the base large.

What is capillary attraction in plumbing?

It refers to the phenomenon of liquids rising in narrow tubes. Signup and view all the answers

What is the purpose of resealing traps in plumbing?

To prevent evaporation and maintain the water seal. Signup and view all the answers

Explain the concept of a combined system in drainage.

A combined system conveys both foul water and surface water through a single drain. Signup and view all the answers

What is the purpose of a foul drain?

To convey foul and waste water from sanitary appliances to the foul water sewer or private sewage disposal plant Signup and view all the answers

Where does the surface water drain convey rainwater and surface water to?

To the public surface sewer or soakaway Signup and view all the answers

According to Prof.E.Adinyira, what are the three main access points on drains?

Inspection chambers (manholes), Rodding eyes, Gullies Signup and view all the answers

What are the six points where access to drains must be sited according to Prof.E.Adinyira?

Vertical or horizontal change of direction, on long runs, at a junction, near or on the head of each drain run, near sewage disposal points, at a change of pipe size Signup and view all the answers

In a partially separate system, where is most of the surface water conveyed?

To the surface water sewer or soakaway Signup and view all the answers

What type of drainage system used depends on the type of what?

Public sewer Signup and view all the answers

What is the purpose of drain ventilation?

Prevents the build up of smells within the drain; avoids pressure fluctuation; prevents drying and flaking off of deposits on the drain walls. Signup and view all the answers

How is the ventilation of the drain provided?

By means of a vent stack at the head of the foul water drain and a fresh air inlet at the last manhole. Signup and view all the answers

What are public sewers?

Underground pipes laid by the local authority to which sewage from individual houses are connected. Signup and view all the answers

What is dilution in the context of sewage disposal?

The discharge of sewage to a sufficiently large body of water, like a stream, river, or lake. Signup and view all the answers

What is sewage conservancy?

Foul water is collected and temporarily stored on the site, retained and periodically removed. Signup and view all the answers

What is a cesspool?

An underground watertight chamber for collecting and storing foul water until it is pumped out for disposal. Signup and view all the answers