Fabrication and Welding Examination Summary Level 3 – June 2017

QUALIFICATION TITLE

Level 3 Diploma in Fabrication and Welding Practice

QAN

A5700-03 and C5700-03/C5701-03 D5700-03 0035

UNIT NUMBER (URN)

URN  600/5130/9

A01 Science and Calculations for fabrication and welding practice

SERIES DATE

5th June 2017 to 16th June 2017
The report below summarises the findings of the examiner team following the recent examination/assessment series.  Tutors are required to take note of the recommendations made by the Lead Examiner to ensure that candidates are supported in achieving the best possible outcome in future assessments.

LEARNING OUTCOME

COMMENTS

1

1.1 – Many candidates did not know the melting temperature of materials

1.3 – Many candidates were unsure of the actual grain structure within a material after being worked

1.4, 1.5 – Many candidates were unsure of the effects of heat treatment of a material

1.6 – Majority of candidates showed a good understanding of residual stress within a material

1.7, 1.8 – Few candidates could describe the macro-structure of an arc welded joint

1.9, 1.10 – Few candidates could describe how dilution could be resolved when welding dissimilar metals

1.11 – Many candidates were unsure of the difference between sacrificial anodes and differential aeration corrosion

2

2.3 – Candidates were unable to state the advantages and disadvantages of hot and cold working on low carbon steel

1

1.6 – Most candidates could describe the effects of welding and the cooling rates on the structure of steels

3

 

3.1, 3.2 – Limited knowledge shown across all centres with regards the differences between a moving core reactor and a tapped reactor

3.3 – The majority of candidates could recognise plug/socket colours

3.4 – Poor understanding shown by candidates of the use of power factor correction in an AC circuit

3.5 – Many candidates could define the basic function of electrical components

3.6, 3.7 – Most candidates could describe the output characteristics of welding power sources

3.9 – Majority of candidates could explain the term ‘duty cycle’ in relation to a welding power source

4

 

4.2 – Candidates were able to carry out calculations on volumes of butt and fillet welds but not all completed the answer with the derived units

4.3 – Candidates were capable of completing total length calculations but may did not complete the answer with derived units

4.4 – Candidates could not correctly calculate the mass of a material

4.6 – Many candidates could not calculate using the Pythagoras Theorem

4.7 – Poor understanding shown of trigonometry although most were able to see that they had to use sine, cosine or tangent

4.8 – Majority of candidates could perform calculations, using current costs of consumables on welding activities

5

 

5.1 – Candidates were able to list common causes of failure in welded joints/fabrications

5.3 – Candidates were able to explain how restraining is used to control distortion in welded joints

5.4, 5.5 – Candidates could describe the effects of distortion on welded joints and factors that may affect the amount of distortion

5.7 – Most candidates could describe the effects that oxygen, nitrogen and hydrogen can have on a welded joints

5.8 – Most candidates could identify the use of Non-Destructive Testing (NDT) methods on materials

5.9, 5.10 – Most candidates could describe the advantages and limitations of NDT methods and state welding defects detected by NDT methods

5.11 – Most candidates could recognise the use of welding procedure sheets

5.12 – Most candidates could state factors that influence the location of welded joints in fabrications