2365 203 #4 - Scale Diagrams

What is the purpose of a scale drawing in electrical installation?

• To make the drawing easier to photocopy

• To fit large areas onto a small sheet of paper accurately

• To reduce the number of labels needed

• To show colours of cables

What does a scale of 1:50 on a plan mean?

• 1 metre on drawing = 50 metres in real life

• 1cm on drawing = 50cm in real life

• 50cm on drawing = 1cm in real life

• 1cm on drawing = 2 metres in real life

Why are scale drawings important in installation work?

• They look more professional

• They show building structure only

• They allow accurate positioning of accessories

• They reduce cable cost

What tool is used to interpret and convert scale dimensions?

• Voltage tester

• Scale rule

• Megger tester

• Clamp meter

What can happen if a scale is misinterpreted during installation?

• You need more paperwork

• The client is confused

• Accessories may be installed in the wrong positions

• You order too many circuit breakers

Which of the following is typically shown on a scaled floor plan?

• Testing results

• Cable sizes

• Accessory positions and cable routes

• Client contact details

What does a legend on a drawing provide?

• An index of page numbers

• A list of testing results

• Explanations of symbols and abbreviations used

• Emergency contact info

Why should all electrical drawings include a legend?

• To reduce costs

• So users understand the symbols and scale used

• To show the date

• To list installer names

Which document provides guidance on interpreting technical drawings in practice?

• EAWR

• COSHH

• On-Site Guide

• Part P

Which skill is most important when converting a scaled measurement to real-world size?

• Artistic ability

• Numerical reasoning

• Colour recognition

• Memory