Workshop Technology
A neutral flame is obtained by supplying

More volume of oxygen and less volume of acetylene
None of the listed here
Equal volumes of oxygen and acetylene
More volume of acetylene and less volume of oxygen

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Workshop Technology
Shift is a casting defect which

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

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