Fabrication and Welding Examination Summary (Level 3 Diploma) – February 2017

QUALIFICATION TITLE Level 3 Diploma in Fabrication and Welding Practice.

 

QAN A5700-03 and C5700-03/C5701-03 D5700-03 0034

 

UNIT NUMBER (URN) URN   600/5130/9

A01 Science and Calculations for fabrication and welding practice

 

SERIES DATE 20th February 2017 – 3rd March 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
ONE 1.1 Some candidates were not able to explain the physical properties of a material

1.3 Well answered by candidates with regards the effects of hot and cold working on the grain structure of steels

1.4/1.5 Well answered question with regards to the heat treatment processes used in fabrication and welding and describe the effects on the structure of LCS but still confusion with regards to quenching of stainless steel.

1.7/1.8 Not all candidates could describe the macro-structure of an arc welded joint with reference to grain structures.

1.9/1.10 Poor and brief descriptions of the term dilution, no candidate mentioned percentages in their answers. Some candidates had difficulty in recognising the problems when welding dissimilar materials

1.12 The majority of candidates could explain methods used to overcome the effects of galvanic and differential aeration types of corrosion

 

TWO

 

2.3 Good understanding shown by candidates of the hot and cold working on low carbon steel

 

THREE 3.1/3.2 Half of the candidates could explain the methods of regulating the output current for welding.

3.3 The majority of candidates could identify plugs and sockets used to connect welding power sources

3.4 Any question relating to power factor correction due to the inductive effect in a welding circuit is still found difficult to answer by candidates

3.5 All candidates could not clearly define the basic function of electrical components

3.6/3.7 The majority of candidates could describe the output characteristics of welding power sources.

3.9 ALL candidates show a reasonably good understanding of the term “duty cycle” in respect to arc welding power sources

 

FOUR

 

4.3 Evidence of confusion on how to attain the mean diameter, calculations worked through correct but not with the mean diameter.

4.4 Calculating the mass of a material is still an issue across centres as they are unsure of the formula to use and with regards conversion of units with candidates leaving it blank

4.7 Candidates are still finding the calculation of angles and sides of a right angled triangle using trigonometry difficult with some candidates unsure of which formula to use, Tan, Cos, and Sine

4.8 The majority of candidates across the centres could perform calculations, using current costs of consumables on welding activities

 

FIVE

 

5.3 Good understanding of methods used to control distortion in welding

5.4/5.5 Most candidates were able to identify at least one type of stress/load, but not always identifying and using correct terms

5.7 The majority of candidates could describe the effects that oxygen, nitrogen and hydrogen can have on a welded joints

5.9/5.10 All candidates could describe the advantages and limitations of NTD methods. State typical welding defects detected by NDT methods

5.11 The majority of candidates could identify items contained on a weld procedure sheet

5.12 The majority of candidates could state factors that influence the location of welded joints in fabrications