unit 110 - Plastic Pressure Pipe ppt 1

Plastic pressure pipes are supplied in either straight lengths of __ or in coils of up to __ in length.

• 3.0m, 50.0m

• 2.0m, 30.0m

• 4.0m, 60.0m

• 5.0m, 70.0m

Answer explanation

Plastic pressure pipes are typically supplied in straight lengths of 3.0m and can be coiled up to 50.0m in length, making the correct choice 3.0m, 50.0m.

What is one advantage of the flexibility of plastic pressure pipes?

• They are more expensive

• They can be fed under floors and in voids easily

• They require more joints

• They are not suitable for hot water

Answer explanation

One advantage of plastic pressure pipes is their flexibility, allowing them to be easily fed under floors and in voids. This makes installation simpler compared to more rigid piping options.

Due to the long section-lengths available, there would be fewer ______ along the pipework, reducing the risk of leaks.

• joints

• connections

• valves

• fittings

Answer explanation

The correct answer is 'joints' because fewer joints along the pipework mean fewer points where leaks can occur. Joints are typically the weakest points in piping systems, so reducing them minimizes leak risks.

Plastic pressure pipes are suitable for ______ and can be used for central heating systems.

• cold water only

• hot water only

• both hot and cold water

• neither hot nor cold water

Answer explanation

Plastic pressure pipes are designed to handle both hot and cold water, making them versatile for various applications, including central heating systems.

What type of action does a pipe cutter use to cut the plastic tube?

• A) Shearing-type action

• B) Rotating-type action

• C) Drilling-type action

• D) Hammering-type action

Answer explanation

A pipe cutter uses a shearing-type action to cut through plastic tubes. This action involves applying pressure to create a clean cut by shearing the material, making option A the correct choice.

What is a characteristic of most pipe cutters?

• They are reusable.

• They are disposable.

• They are electric.

• They are manual.

Answer explanation

Most pipe cutters are designed to be disposable, making them convenient for one-time use. This characteristic distinguishes them from reusable tools, which are typically more durable and meant for multiple applications.

What is a characteristic of a pipe slice?

• It has support rollers opposite the cutting disc.

• It gives a very straight and clean cut on the pipe.

• It is used for cutting wood.

• It is a type of hammer.

Answer explanation

A pipe slice is designed specifically for cutting pipes, providing a very straight and clean cut. This characteristic is essential for ensuring proper fit and alignment in plumbing and piping applications.

The function of the blade or cutting disc in a pipe slice is to:

• cut the pipe

• measure the pipe

• support the pipe

• connect the pipe

Answer explanation

The blade or cutting disc in a pipe slice is specifically designed to cut the pipe, making it the correct choice. The other options do not accurately describe the primary function of this tool.

Which direction does the pipe slice rotate?

• Clockwise

• Counterclockwise

• Upwards

• Downwards

Answer explanation

The pipe slice rotates in a clockwise direction, which is the correct answer. This means that if you were looking down at the pipe, it would move in the same direction as the hands of a clock.

What is a characteristic of most plastic pressure pipe slices?

• They are reusable.

• They have a metal body.

• They have a plastic body.

• They do not have replacement blades.

Answer explanation

Most plastic pressure pipe slices are characterized by having a plastic body, which makes them lightweight and resistant to corrosion. This distinguishes them from metal-bodied options.