Manufacturing And Production Technology
Misrun is a casting defect which occurs due to

Absorption of gases by the liquid metal
Improper alignment of the mould flasks
Very high pouring temperature of the metal
Insufficient fluidity of the molten metal

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Manufacturing And Production Technology
Calculate the weld per minute, work speed of circular electrode of 220 mm diameter for carrying out seam welding at 4 welds per cm on 1.6 mm thick mild steel tube. Welding cycle consists of 3 cycles ‘on’ and 2 cycles ‘off’ Power supply is at 50 Hz.

600 welds/min, 1500 mm/min
500 welds/min, 1250 mm/min
22 welds/min, 55 mm/min
3000 welds/min, 75 mm/min

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Manufacturing And Production Technology
A fixture is defined as a device which

Is used to check the accuracy of workpiece
All of these
Holds and locates a workpiece and guides and controls one or more cutting tools
Holds and locates a workpiece during an inspection or for a manufacturing operation

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