L2 Plumbing Common Plumbing Processes Knowledge Test

Which of the following would be most suitable masonry drill to use to make a hole in brickwork for a brown plug?

• 5.5mm HSS bit

• 7.0mm HSS bit

• 5.5mm SDS bit

• 7.0mm SDSbit

What is the purpose of the tool shown?

• To install a sacraficial anode

• To remove an immersion heater

• To remove a tap backnut

• To tighten a compression nut

Which of the following is the British Standard for the manufacture of copper pipes used in the plumbing and heating industry?

• BS EN 806

• BS1710

• BS1212

• BS EN 1057

What is the minimum total length of pipe required to machine bend 15mm copper pipe to 90 degrees ?

• 60mm

• 95mm

• 100mm

• 115mm

LCS Pipe is given a colour band to indicate its grade. What grade is indicated by a blue band?

• Light

• Medium

• Heavy

Which of the following plastic pipe materials is commonly used for the distribution of underground mains cold water supplies?

• Polybutylene

• ABS

• PVCu

• MDPE

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

• 65mm

• 82mm

• 110mm

• 160mm

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

• 10% of the depth of joist

• 20% of the depth of joist

• 25% of the depth of joist

• 30% of the depth of joist

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

• 1.8m

• 2.4m

• 2.7m

• 3.0m

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

• 0.5m

• 0.9m

• 1.2m

• 2.0m