Workshop Technology
In shielded arc welding

Large electrode is used
Welding rod coated with slag is used
None of the listed here
Welding rod coated with fluxing material is used

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Workshop Technology
The diaphragm moulding machine is used to

Ram the sand harder at the back of the mould and softer on the pattern face
Give uniform sand hardness throughout the mould
Produce uniform packing of sand in the mould
Ram the sand harder at the pattern face with decreasing hardness towards the back of the mould

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Workshop Technology
Shift is a casting defect which

Results in general enlargement of a casting
Occurs near the ingates as rough lumps on the surface of a casting
Results in a mismatching of the top and bottom parts of a casting
Occurs as sand patches on the upper surface of a casting

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