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Workshop Technology

Workshop Technology
For obtaining a cup of diameter 25 mm and height 15 mm by drawing, the size of the round blank should be approximately

48 mm
46 mm
42 mm
44 mm

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Workshop Technology
When filing soft metals, the file teeth are clogged with minute particles of metal. The file should be cleaned by

Rubbing on wood
Washing it with water
Washing it with dilute acid
Using file card

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Workshop Technology
For gas welding, the pressure desired at the welding torch for oxygen is

280 to 560 kN/m²
70 to 280 kN/m²
7 to 103 kN/m²
560 to 840 kN/m²

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Workshop Technology
In welding copper alloys with TIG arc welding

Direct current with straight polarity is used
Any one of the listed here
Alternating current is used
Direct current with reversed polarity is used

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Workshop Technology
The shrinkage allowance for cast iron pattern is

16 mm/m
10 mm/m
26 mm/m
20 mm/m

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Workshop Technology
The mode of deformation of the metal during spinning is

Rolling and stretching
Stretching
Bending and stretching
Bending

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