PLUMBING SCIENCE Flashcards
what is strength
it is when martials can withstand heavy loads without breaking
what is the units of kelvin
k is the is unit
what temperature does water freeze
0 degrees Celsius
what is a pure metal
its when is extract from an ore
what type of water make the pipe corridor
soft water
types of non ferrous metal
aluminium/lead/zinc/tin
types of plastic
upvc/polypropylene/abs
what is heaviness in
the denseness of a material. a dense material will be heavy in relations to its size
what is calvanic corrosions
when two dissimilar metals are in contract with each other through
presence of an electrolyte
what degrees does water melt at
32 Celsius
what are the units of velocity
m/s
what is the unit of force
N
what is the formlour for mass
mass equal length times width times height equal volume in m3
what is the charge of proton
+1
what is the charge of neutron
0
what is the charge of electron
-1
what is a natural gas
is a gas mixture of gaseous hydrocarbons consisting of primarily of methane
what is a first class lever
a first class is one where fulcrum lies between the effort
what are the units of pressure
pa
what are the units of flow rate
m3/s
how does limescale build up
Temporary hard water
si unit for electrical current
ampere
what is the fuse for a domestic appliance
13 amp
how do you calculate heat capacity
kj/kg/0c
what cause siphonage
increase in pressure
What can limestone cause
Temporary hard water
What is soft water
Water that had low minerals
What does wras mean
Water regulations advisory scheme
3 source of water
Rainwater surface water
Groundwater
What is a reliable water source
Artesian wells
What makes water “plumbo-solvent”?
Soft water with added CO2
What system supplies water directly to all outlets without storage?
Direct cold water system
What is the typical size of a rising main for most dwellings?
15mm
What is fluid category 1 water classified as?
Wholesome water for domestic use
In indirect systems, what should cold water cisterns provide?
Adequate storage capacity
What material is commonly used for modern cold water supply pipes?
Medium-Density Polyethylene (MDPE)
Who is responsible for maintaining the communication pipe?
Water undertaker
In an indirect cold water system, which outlet is usually fed directly by the mains?
Kitchen sink
What is the final stage of the water treatment process?
Disinfection
