Plumbing Science Flashcards
(41 cards)
What four different groups can metal be divided into
Alloy
Pure
Ferrous
Non-ferrous
What two types of plastic are there
Thermoplastic
Thermo-setting plastics
What different type of liquid do you come across in plumbing
Water
Refrigerant
Anti-freeze/glycol mixes
Fuel oils
Lubricant/greases
What is toughness
The amount of energy a material can absorb without breaking or fracturing
What is strength
The measure of how Material withstand heavy loads without breaking
What is shear strength
The maximum force a material can withstand when being ripped
What is elasticity
The length that a material can be stretched and return to it’s original length when released
What is the si unit for temperature
Kelvin
What three different ways can you transfer heat
Conduction
Convention
Radiation
What a three states of matter
Solid
Liquid
Gas
What is the si unit for mass
Kilograms
What is compressive strength
The maximum force a material can withstand when being crushed
What is hardness
The resistance of material to being cut , deformed or bent
What is torsion strength
The maximum force a material can withstand when being twisted
What is heat and electrical conductivity
The measure of how well a material conducts heat and electricity
What is heaviness
The denseness of a material. A dense material will be heavy in relation to its size
What is the purpose of insulation in a hot water cylinder?
To prevent heat loss and save energy
How is soldering able to run a pipe
Capillary action
What type of water corrodes pipe work
Soft water
Which type of water is difficult to lather
Hard water
Limescale deposits form by which type of water?
Temporary hard water
What percentage does water expand by when it’s frozen?
10%
What temperature is water’s maximum density?
4 degrees Celsius
What is velocity
The rate and direction of the change in the position of an object
