unit 113 powerpoint 2

Which table corresponds to the R250 designation in the new BSEN1057?

• Table X

• Table W

• Table Y

• Table Z

Answer explanation

Table X corresponds to the R250 designation in the new BSEN1057, as specified in the standard. The other tables (W, Y, Z) do not match this designation.

What is the diameter range for annealed coils for underground use?

• 15-22 mm

• 6, 8, 10 mm

• 12, 15, 22 mm

• 28 mm and larger

Answer explanation

The diameter range for annealed coils used underground is specifically 15-22 mm, making this the correct choice. Other options either fall outside this range or do not represent standard sizes for underground applications.

What is the large bore diameter range?

• 28 mm and larger

• 6, 8, 10 mm

• 12, 15, 22 mm

• 15-54 mm

Answer explanation

The large bore diameter is defined as 28 mm and larger. Other options like 6, 8, 10 mm or 12, 15, 22 mm do not meet this criterion, making '28 mm and larger' the correct choice.

What is the recommended action when copper pipes emerge from the floor?

• Leave them exposed

• Wrap them with denso tape

• Paint them

• Cover with plastic

Answer explanation

Wrapping copper pipes with denso tape is recommended to protect them from moisture and corrosion. This helps maintain their integrity and prevents potential leaks, making it the best choice compared to leaving them exposed or covering them with plastic.

What type of reducers are mentioned in the document?

• Internal and external

• Horizontal and vertical

• Large and small

• Fixed and adjustable

Answer explanation

The document specifically mentions 'internal and external' reducers, which are types that categorize how the reduction process is applied. Other options do not align with the terminology used in the document.

What is required for a piece of pipe before using a Type A non-manipulative fitting?

• The pipe must be painted.

• The pipe must be cut square and the burrs removed.

• The pipe must be heated.

• The pipe must be bent.

Answer explanation

Before using a Type A non-manipulative fitting, the pipe must be cut square and the burrs removed to ensure a proper fit and seal. This step is crucial for maintaining the integrity of the connection.

How is the fitting assembled in a Type A non-manipulative fitting?

• Using glue.

• Using a hammer.

• With an olive and tightened using an adjustable spanner.

• With nails.

Answer explanation

In a Type A non-manipulative fitting, the assembly is done using an olive, which is a type of compression fitting, and it is tightened with an adjustable spanner to ensure a secure connection.

What type of pipes is the Type A non-manipulative fitting suitable for?

• Only plastic pipes.

• Only steel pipes.

• Half-hard copper and plastic pressure pipes.

• Only aluminum pipes.

Answer explanation

Type A non-manipulative fittings are specifically designed for use with half-hard copper and plastic pressure pipes, making this the correct choice. Other options do not align with the fitting's compatibility.

In Step 2 of jointing a copper pipe, what is inserted into the fitting socket?

• Compression nut

• Compensating ring

• Adapter piece

• Spanner

Answer explanation

In Step 2 of jointing a copper pipe, the adapter piece is inserted into the fitting socket to create a secure connection. This is essential for ensuring a proper fit and preventing leaks.

What is the purpose of the compensating ring in the jointing process?

• To cut the tube

• To flare open the end

• To slip over the tube

• To tighten the fitting

Answer explanation

The compensating ring is designed to slip over the tube, providing a secure fit in the jointing process. This ensures proper alignment and connection between components, making it essential for effective jointing.