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15 questions from this quiz
Mechanical, chemical & coating
Abrasive compounds & soft materials
Below the centre line of the wheel
Approximately 8mm
Carborundum paste
Round-ended hammer
Copper & aluminium
Pitch
Square graver
Ferric chloride
Approximately 850°C850°C850°C
Explosion risk from rapid steam
Straw → purple → blue → gray
Approximately 180°C180°C180°C
Cathode (negative terminal)
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