5.1 Give TWO reasons why the template loft is separated from the workshop in most cases - NSC Mechanical Technology Welding and Metalwork - Question 5 - 2018 - Paper 1
Question 5
5.1 Give TWO reasons why the template loft is separated from the workshop in most cases.
5.2 Describe the purpose of purlins as used on roof trusses.
5.3 A steel r... show full transcript
Worked Solution & Example Answer:5.1 Give TWO reasons why the template loft is separated from the workshop in most cases - NSC Mechanical Technology Welding and Metalwork - Question 5 - 2018 - Paper 1
Step 1
Give TWO reasons why the template loft is separated from the workshop in most cases.
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Answer
The template loft is typically quieter, which enhances focus and precision in work processes.
The lighting in the template loft is better, providing an improved working environment for detailed tasks.
Step 2
Describe the purpose of purlins as used on roof trusses.
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Answer
Purlins serve two main purposes:
They support the roof covering, distributing the weight across the trusses.
They stabilize the trusses, ensuring structural integrity and preventing deformation.
Step 3
Calculate the dimensions of the required material.
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Answer
To fabricate the steel ring, we calculate:
Mean diameter = Outside diameter - 2 × Material thickness = 880 mm - 2 × 50 mm = 780 mm
Mean circumference = π × Mean diameter = π × 830 mm = 2607.52 mm
Required square steel bar size: 2608 mm of 50 x 50 mm square steel bar is necessary to fabricate the ring.
Step 4
Make a neat sketch of the steel ring indicating the mean diameter, outside diameter and the thickness of the material.
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Answer
A sketch should be provided illustrating the ring, clearly labeling:
Mean Diameter: 780 mm
Outside Diameter: 880 mm
Material Thickness: 50 mm
Step 5
Identify the following resistance weld symbols:
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Answer
5.4.1 Spot weld
5.4.2 Seam weld
Step 6
Label parts A–F on the welding symbol.
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Answer
The labeled parts should correspond to:
A. Tail
B. Weld symbol (Fillet weld)
C. Pitch of weld
D. Site weld
E. Arrow
F. Field weld
