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Worksheetsplumbing science 1
Total questions: 20
Worksheet time: 11mins
Describe what a pure metal is, and where the metal could be used in a plumbing situation.
Copper and lead is a pure metal that can be used in plumbing for its corrosion resistance and malleability.
What does a ferrous material contain?
What is a disadvantage of a ferrous material?
What is an alloy?
Name two alloys used in the plumbing industry and where they may be found.
Bronze (copper and tin). Secondary circulation pump.
Brass (copper and zinc). Compression fittings.
What plastic is commonly used as the underground mains and the service pipe to a property?
What plastic can be used to supply hot and cold water to the draw off point inside a domestic property?
Which plastic is used on waste discharge branches and can be solvent welded?
What is density equal to?
What is the relative density of water?
Why will LPG sink to the floor?
What does ductile mean?
Name a malleable material.
If a customer has 10 litres of water and needs to heat is from 100C to 600C, how much heat is required, in joules, to complete the task?
Note: Specific heat capacity of water is 4.186KJ/Kg
(a)
How is corrosion on the inside of LCS central heating pipework prevented?
When using LCS pipework for hot water systems, how is corrosion prevented?
What do the letters DZ, stamped on a modern brass fitting, mean?
Describe electrolytic corrosion.
(a)
In a domestic hot water cylinder there is quite often a sacrificial anode. What material is this generally made of?
Name the five elements which effect plastic and cause it to corrode.
1. Humidity
2. friction 3. Friction Oxygen, 4. Daylight yellowing, 5. Chemicals
1. Humidity
2. friction 3. heat, 4, grease. 5 oxygen
1. Pressure 2. friction 3. heat, 4, grease. 5 oxygen
