Outcome 1 Measuring and bending tubes - Site Preparation

Multiple Choice

Which of the following is equivalent to 1 metre?

• 100 centimetres

• 10 millimetres

• 1,000 millimetres

• 1,000 centimetres

Open Ended

Why is it important for plumbers to accurately measure and bend tubes when working on plumbing systems?

Multiple Choice

Which measuring tool is best suited for quick room measurements?

• Steel rule

• Tape measure

• Site tape

• Laser distance metre

Multiple Choice

Which of the following benders is suitable for bending R250 half hard copper of 28mm diameter?

• Microbore hand bender

• Scissor type bender

• Stand bender

• Electric tube bender

Fill in the Blanks

The grade of copper used for coiled microbore heating pipes is

.

Multiple Choice

What are the typical diameters for minibore/microbore copper tubes?

• 6, 8, 10mm

• 12, 15, 22mm

• 28mm and larger

• 15-54mm

Multiple Select

Select all the correct statements about the protection of copper pipes.

• Copper pipes are most vulnerable when laid in concrete flooring.

• Plastic coating is used to protect copper pipes in vulnerable areas.

• Copper pipes do not require protection when emerging from the floor.

• Denso tape can be used to protect copper pipes.

Open Ended

Explain the differences between R220 and R250 copper in terms of their applications and forms.

Multiple Choice

What is the main purpose of coating copper pipes?

• Protection and identification

• Improving water flow

• Reducing pipe weight

• Increasing pipe flexibility

Multiple Select

Which of the following are advantages of bending pipe instead of using a fitting?

• Less frictional resistance

• Higher cost

• Prefabrication in one go

• Requires more tools

Open Ended

List and briefly describe two methods used to bend copper tubes, and explain one advantage of bending pipe rather than using a fitting.

Fill in the Blanks

Bending springs are occasionally used by plumbers when trying to bend an existing piece of pipe without

it.

Open Ended

Explain the process of using an internal bending spring to achieve a 90-degree bend in a pipe. What is the purpose of slightly over-pulling the spring?

Fill in the Blanks

The formula to calculate the length of pipe needed for a bend is

x 2 x 3.14 divided by 4.

Multiple Choice

Which angles are commonly used for bending tubes as shown in the image?

• 22.5°, 45°, 90°

• 30°, 60°, 120°

• 15°, 60°, 90°

• 45°, 75°, 105°

Open Ended

Explain the importance of working from a fixed point and marking the throat of the bend when measuring and bending tubes.

Multiple Select

Which measuring methods can be selected when preparing to bend tubes?

• Back to back

• Centre to centre

• Back to inside

• Inside to back

Fill in the Blanks

Fill in the blank: The combination square is a tool used for measuring and marking

angles.

Open Ended

List and briefly describe two types of common bends used in tube bending.

Multiple Choice

What does the term 'X dimension' refer to in the context of measuring and bending tubes?

• The diameter of the tube

• The centre of fitting to the engaged length

• The total length of the tube

• The thickness of the tube wall

Multiple Choice

Which measurement is used to determine the length of copper to be cut in tube bending?

• Centre to centre distance

• Copper cut length

• X dimensions taken off

• Tube diameter

Multiple Choice

What is the function of a hydraulic bender in tube bending?

• To weld tubes

• To cut tubes

• To bend tubes

• To measure tubes

Open Ended

Describe the process and importance of sealing threads in low carbon steel tube joints.

Fill in the Blanks

Low carbon steel is made from 99.85% iron and

% carbon.

Open Ended

Explain how the grade of low carbon steel affects its use in different systems.

Multiple Select

Which of the following are methods used to protect low carbon steel tubes?

• Galvanized

• Denso tape

• Paint

• Chemical

Open Ended

After learning about the procedures for measuring and bending plumbing tubes, what questions do you still have or what would you like to know more about?

Multiple Choice

What are the standard units of measurement used by plumbers when measuring and bending tubes?

• Millimetres, centimetres, and metres

• Inches, feet, and yards

• Litres, grams, and kilograms

• Pounds, ounces, and stones