Drainage System Components and Functions

What is the primary focus of the construction project discussed?

• Stormwater management

• Clean water supply

• Foul drainage system

• Structural foundation

What is the purpose of the 'heel' feature on a rest bend in a drainage system?

• To provide additional structural support

• To prevent discharge from dislodging the fitting

• To facilitate easier pipe connection

• To indicate the pipe's flow direction

Describe the composition of the plastic drain pipe discussed.

• Entirely virgin plastic

• Entirely recycled materials

• A triple-layer pipe with virgin plastic outer/inner layers and a recycled core

• A single-layer pipe with a recycled coating

Which of the following is NOT a reason for laying the 110mm pipe on a 100mm bed of 10mm shingle?

• To regulate the fall of the pipe

• To provide inherent strength to the plastic pipe

• To protect the pipe from damage

• To allow the pipe to derive strength from compacted granular materials

What is the primary function of a shallow inspection chamber in a drainage system?

• To collect rainwater runoff from the roof.

• To provide access for cleaning and clearing blockages in the drainage pipes.

• To store excess wastewater before it enters the main sewer.

• To regulate the flow rate of wastewater.

Which feature of the bottle gully prevents foul odors from returning through the drainage system?

• Its square top design.

• Its 360-degree rotating base.

• Its trapped design creating an airtight seal.

• Its ability to connect directly to the main drainage run.

What is a key distinction between a shallow inspection chamber and a manhole base inspection chamber, regarding their depth capacity?

• Shallow chambers can go up to 1200mm deep, while manhole bases are limited to 600mm.

• Shallow chambers are typically installed at depths up to 600mm, whereas manhole bases can extend to 1200mm.

• Both types of chambers can reach depths of 1200mm, but manhole bases require more raising pieces.

• The depth capacity depends solely on the pipe diameter, not the chamber type.

How many inlets does a 450mm diameter manhole base inspection chamber typically have, and what advantage does this offer?

• Three inlets, allowing for connection to a single main drainage line.

• Four inlets, providing flexibility for connecting multiple branch lines.

• Five inlets, enabling the connection of multiple drainage runs from various parts of the site.

• Two inlets, simplifying the connection process for straight runs.