Plumbing Quiz

Which of the following is not a common size for PVCu soil pipes?

• 65 mm

• 82 mm

• 110 mm

• 160 mm

What is the maximum diameter of hole that can be drilled in a joist?

• 10% of the depth of the joist

• 20% of the depth of the joist

• 25% of the depth of the joist

• 30% of the depth of the joist

When installing 28 mm copper pipe in the horizontal plane, what is the recommended clipping distance?

• 1.8 m

• 2.4 m

• 2.7 m

• 3.0 m

Which of the following is the maximum recommended clip distance for 40 mm plastic waste pipe in the vertical position?

• 0.5 m

• 0.9 m

• 1.2 m

• 2 m

Complete the table below to indicate which gauge of screw is suitable for each plastic rawplug type.

Calculate the maximum depth of notch if preparing to install copper pipe in a joist that is 300 mm deep.

What grade of copper tube is most commonly supplied in coils and used for microbore heating installations?

Give three statutory regulations relevant to the installation of a central heating system.