Basic drawings and symbols Flashcards
What size is AO paper?
It is 1 square metre in area
What is the purpose of drawing?
Drawings are a means of visual communication to transfer information between people
If AO was folded twice what size would it be?
It will become A2 size
What is important about a margin?
It is important because everything inside it forms part of any contract
What is the title block? Give 4 pieces of information contained in it?
The title block is located within the border. Four prices contained in it are Project title The subject Scale Job number Dates of any revisions
What is the purpose of a scale ruler?
To take measurements from a drawing
What size are block plans?
Block plans are 1:2500
What size are site plans?
Site plans are between 1:500 and 1:2500
What size are general location drawings?
General location drawings are 1:200 or 1:100
What is the work of a plumber often referred to as?
Mechanical services
What type of work does a mechanical services engineer carry out? List 6
Hot and cold water services Central hearing installations Air conditioning pipework Compressed airlines Oil and has supply lines Above and below drain services
Pipes at low level are shown as?
___________
Pipes at high level are shown as?
__ . __ . __ . __
What is meant by RTA
Rise to above
List two items of information contained in a specification?
The spacing of brackets
The type of radiators
What I the advantage of a specification?
When pricing a job the specified standards must be followed. This ensures that no one can use sub standard materials too keep a price low
How are pipes identified when insulated?
A system of colour coding has been designed to identify the pipe work
What colour is un-treated water?
It is green
What colour is natural gas pipework?
It is yellow
What three views are shown in the orthographic projection?
Plan
Elevation
End view
How are all 3 views shown on one drawing?
The plan is an outline of the object when viewed from above
The elevation is what is seen when looking from the front
The end view shows the view from one of the ends
