Welding NCV Level 2 — Memo

February 2020 — NCV Level 2 — Welding

NCV Level 2 2020 NCV Engineering

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Q1— Section header —

1.1.5

1.2Inform employee where personal pr otective equipment must be worn Point out hazards that may not be immediately spotted or obvious Draw attenti on to health and safety hazards

Q2— Section header —

2.1.1scratching technique or tapping technique

2.1.2tapping technique or scratching technique

2.1.3dragging

2.1.4surface

2.1.5

2.2.1earth clamp is attached to the work piece or workbench to complete the electrical circuit to ensure that electricity can flo

2.2.2electrode is used to generate n arc which melts and joins two metals together.

2.2.3An electrode holder is used to hold the electrode comfortably at different angles during the job

2.2.4

2.3Faulty wiring causing serious electrical shock Cables not properly placed causing a tripping hazard Hot electrodes not placed in safe area causing fires or injury Insufficient lighting n the area where work is done

2.4.1Pre heating is the process where a metal or joint of a metal is heated to a specific temperature before welding is performed. The reason for heating the metal is to prevent any cracks during the welding process.

2.5.2Size of weld CONVEX WELD 1 for label + 2 for drawing (6\ [25]25

Q3— Section header —

3.1Straight edge Weld size gauge [10]10

Q4— Section header —

4.1.1275 kPa (1\

4.1.2Size 2 (1\

4.1.3Change the nozzle to size zero. Light up the torch and set to a neutral flame. Shut the acetylene valve on the cutting torch. Shut the oxygen valve on the cutting torch. ut the acetylene and oxygen gas

4.4Ensure that the oxy acetylene flame on the cutting t orch is set to a neutral flame. Hold the cutting torch at the required angle and move the torch to heat the w orkpiece that needs to be cut. Hold the flame slightly above at the

Q5— Section header —

5.1Welding consumables must be stocked on pallets or racks. Welding consumables must be protected against dust and surface contaminations Welding consumables must be repack ed in their original packages if not

5.2Manufacturing drawings indicate exactly how the assembly process is done, how the weld must be prepared, the welding parameters (gas, wire size, setting of the amps etc.\ and the sequence in welding. Welding symbols

5.3.1SHORT CIRCUIT TRANSFER 1 for label + 2 for drawing

5.3.2SPRAY TRANSFER 1 for label + 2 for drawing

5.3.3PULSE SPRAY TRANSFER 1 for label + 2 for drawing

5.3.420

Q6— Section header —

6.1.1Brazing is the process of joining two metals using a filler rod that is heated above melting point and spread between the metals.

6.1.2Capillary action is the process that enables liquids to flow in narrow spaces without the help of external forces.

6.1.3

6.2.1The tension test according to QW 150 specification is used to determine the ultimate strength of the groove weld joints.

6.2.210

Mark Allocation

Sections10 + 25 + 10 + 25 + 20 + 10 = 100 marks

Paper information

TitleMemo

SubjectWelding

LevelNCV Level 2

Document typeNCV Engineering

Year2020

MonthFebruary

Pages7

Downloads3

Examination context

Decade2020s

Years ago6y

SeasonSummer (SH)

Start daySaturday

Exam periodFebruary 2020

Days since exam2,444

About Welding examination preparation

This TVET examination resource can be used as part of a structured revision programme. Past papers are most useful when learners attempt questions independently, work within a realistic time limit, and review their answers afterwards.

How to use this resource for revision

A TVET past examination paper is most useful when it is treated as an active revision exercise. Try the questions yourself before checking the corresponding memorandum. Where you make an error, identify the reason — was it a knowledge gap, a calculation mistake, an interpretation issue, or an examination technique problem?

For stronger examination practice, complete the paper without unnecessary interruptions and keep track of the questions that take the most time. Afterwards, review the memorandum and separate knowledge gaps from mistakes caused by interpretation, calculation, structure, or examination technique.

understanding question requirements

applying subject knowledge

working under time constraints

checking answers

identifying revision priorities

A practical revision approach

Start by completing the resource without looking at the memorandum. Review incorrect and incomplete answers afterwards and make a short revision list based on the areas that caused difficulty.

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