GMJ 6035 MCQ* plumbing science

The 'guide' in the image of a bending machine is shown at point

• A

• B

• C

• D

Which one of the following correctly identifies the tool shown in the image?

• Internal bending spring

• Microbore scissor bender

• Hydraulic bending machine

• Tripod bending machine

Which one of the following tools is used to bend Low Carbon Steel pipe?

• Hydraulic bending machine

• Pipe deformation tool

• Scissor bending machine

• Electric pipe crimpers

Which one of the following is the colour code for medium grade LCS pipework?

• Blue

• Red

• Yellow

• Brown

Which type of copper tube is normally used for an above ground 22mm cold water supply pipe?

• R220 soft coils

• R250 half hard lengths

• R290 half hard lengths

• R290 hard lengths

Which one of the following materials is most resistant to corrosion?

• Cast iron

• Low carbon steel

• MDPE

• R250 copper tube

The type of bend shown in the image is

• A 90 degree angle

• A cranked Passover

• An offset bend

• A return bend

When bending copper pipe by the spring bending method, what is the purpose of ‘over bending’?

• To ensure that the pipe is bent to exactly the correct angle

• To prevent ‘ripples’ forming on the bend

• To prevent the pipe being ‘throated’

• To aid the release of the spring

The required distance between the centres of two equal tee fittings on a copper pipeline is 300mm. The X dimension of the tee fittings is 15mm. The length of pipe between the tees is therefore which one of the following?

• 185mm

• 270mm

• 315mm

• 330mm

Which one of the following correctly identifies the fitting shown in the image?

• Equal Tee

• 'O' ring Tee

• Compression tee

• Pushfit tee