Plumbing Science Flashcards
What SI base units are common to the Building service Industry?
Length- Metre- m
Mass- Kilogram- kg
Time- Seconds- s
Electric current- Ampere- A
Temperature- Kelvin- K
What type of metal is iron?
Ferrous
What type of metal is copper?
Non ferrous
Name 4 other non-ferrous metals?
Aluminium, lead, zinc, tin
What does a ferrous metal contain?
Ferrous metals contain iron, such as steel and cast iron?
What makes ferrous metals corrode?
Water and air
What is non-ferrous metal?
Non-ferrous metals do not contain iron
What is an alloy?
An alloy is a blend of two or more elements, one of which must be a metal
What are typical alloys in the plumbing industry?
Brass, bronze, gun metal, steel, stainless steel, iron and lead
What are the two types of plastic?
Thermoplastic and thermo-setting plastic
What is thermoplastic?
Thermoplastics are made from polymer resins that become liquid when heated and hard once they are cooled down
What is thermo-setting plastic?
Thermo-setting plastic is different to thermoplastic as they can only be heated and moulded once, they cannot be reheated and remoulded and their initial shape is permanent
What is hardness?
The resistance of material to be cut, deformed and bent
What is toughness?
The amount of energy a material can absorb without breaking or fracturing
What is tensile strength?
The max force a material can withstand when being pulled apart
