Sean Flashcards
At what temperature will water freeze at
0 degrees Celsius
List 3 characterists of water
Odourless tasteless and transparent
What is mild steel pipe also know as
Low carbon steel
Why can’t you use mild steel pipe on a fresh water system
It will cause coroson problems
What is the purpose of a flash back arrestor
To prevent sparks from getting into the bottles
On what type of installation would victualling joints be used
Sprinkler system
When piping a steam installation what type of jointing compounds would you use on threaded joints
Ptfe and black foliac
What is the circumference of a circle
Is the outer area of the circle
Water can be classified as 2 types. Name the types
Hardness and softness
Why do copper pipes burst when they freeze
Because the copper pipe expands which is not able to stand the strain which would make it burst
What is 3000 litre of water equal to in kg
3000 kg
Explain radiation and give an example
Is the heat that is given off in straight lines example of that is below heater
What is the purpose of an expansion joint/loop
So it can give the pipe some room to expand and move
Name 4 pure metal used in plumbing
Copper iron zinc and tin
Give 2 reason for insulating a storage cistern
To prevent heat loss and to keep it cool during the summer
Name 3 good metal conductors of heat
Copper brass and mild steel
Explain what tempering is
Is when the pipe is heated then it gets cooled down after it for it to Harding
What does everything inside the border of a drawing form
A contractor
List 3 pieces of information you would find on a specification
The fittings to be used. The location of the barracks . The pipe to be used
List 3 characterists of water
Odourless tasteless and transparent
At what temperature will water freeze at
0 degrees Celsius
What is the purpose of a regulator on a gas cylinder
To allow you adjust the pressure you want
List 3 methods of joining mild steel pipe together
Threaded welded and electrical grooving
What is mild steel pipe coated with to make it galvanized
Zinc
What pressure is an oxygen bottle pressurised to
230 bars
What reacts explosively with oxygen
Oil grease and soap
Explain fusibility
The point at which a metal will melt or fuse with another metal
Explain malleability
The ability of a metal to be worked into a new shape without breaking
Explain elasticity
The ability of a material to return to its original shape after being pulled or pushed out of shape
What 3 states does water occur in
Gas liquid and soilded
Explain what an alloy is
An alloy is a metallic substance made by mixing two elements together one of which must be a metal
Name 4 materials gaskets are made from
Insertion rubber tux earnie halite and Taylor rings
Name 3 elements required for a fire to take place
Heat fuel oxygen
What is sniffing
Is when you get a new cyclinder your turn it on for a slit second then turn it back off
Explain what ductility is
Is the ability of a metal to be stretched without breaking
Explain what tenacity is
Denote a materials ability to resist being stretched
Maximum density explain
Is the temp where water will no longer expand or contract
What is the purpose of acetone in relation to an acetylene bottle
The acetone acts like a sponge and soaks up the acetylene
Name 4 types of thermal insulation used in plumbing
Glass fibre foam rubber ridge and foils
What are the units for heat time and force in the a.i system
Julles,seconds and mutates
Name 3 grades of mild steel
Medium grade heavy grade and schedule 40
What are the units for heat time and force in the a.i system
Julles,seconds and mutates
Name 3 grades of mild steel
Medium grade heavy grade and schedule 40
Name 3 types of flames
Nutural flame oxidising flame and carburising flame
