212 ppt5 plumbing processes

Which grade of copper tube is fully annealed and supplied in coils?

• R250

• R290

• R220

• R300

Answer explanation

R220 copper tube is fully annealed and supplied in coils, making it the correct choice. Other grades like R250, R290, and R300 do not meet this specific requirement.

What is the wall thickness characteristic of R220 copper tubes?

• Thinner than other grades

• Thicker than other grades

• Same as other grades

• Variable thickness

Answer explanation

R220 copper tubes are known for their thicker wall thickness compared to other grades, providing enhanced strength and durability, making them suitable for demanding applications.

What is the advantage of using a hand bender?

• Easy to use for micro and small bore

• Requires electricity

• Heavy and bulky

• Expensive

Which type of copper tube is mentioned as half-hard?

• R250 Table X

• R220 Table Y

• R300 Table Z

• R150 Table W

Answer explanation

R250 Table X is specified as half-hard copper tube, distinguishing it from the other options listed, which do not have this designation.

Which of the following is NOT a tool for bending copper tubes?

• Pipe cutter

• Hand bender

• Machine bender

• Bending springs

Answer explanation

A pipe cutter is used to cut pipes, not bend them. The other options—hand bender, machine bender, and bending springs—are specifically designed for bending copper tubes.

If a tube were to be bent to a right angle, how many degrees would that be ?

• 45 degrees

• 60 degrees

• 90 degrees

• 120 degrees

Answer explanation

A right angle is defined as an angle of 90 degrees. Therefore, if a tube is bent to a right angle, it forms an angle of 90 degrees, making this the correct choice.

What is one of the four methods of jointing copper tubes for domestic purposes?

• Compression fittings

• Riveting

• Taping

• Bolting

Answer explanation

Compression fittings are a common method for joining copper tubes in domestic plumbing. They provide a secure and leak-proof connection without the need for soldering, making them ideal for DIY projects.

Which of the following is NOT a method of jointing copper pipes?

• Capillary fittings

• Compression fittings

• ARC Welding

• Push-fit fittings

Answer explanation

ARC Welding is NOT a method for jointing copper pipes, as it involves melting the metal, which is not suitable for copper. The other options—Capillary, Compression, and Push-fit fittings—are all valid methods.

Which method of jointing copper pipes is likely to be the most secure without additional tools?

• Capillary fittings

• Compression fittings

• Push-fit fittings

• Press-fit fittings

Answer explanation

Push-fit fittings are designed for easy installation without tools, providing a secure connection by simply pushing the pipe into the fitting. This makes them the most secure option among the choices given.

What is needed to seal an end feed fitting to a water supply pipe to a tap ?

• Lead based solder

• A blowtorch

• A raised ring

• Lead-free solder

Answer explanation

To seal an end feed fitting to a water supply pipe, lead-free solder is required. It is safer and complies with modern plumbing standards, making it the correct choice over lead-based options.