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Workshop Technology

Workshop Technology
According to Indian standards, the total numbers of tolerance grades are

18
8
12
20

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Workshop Technology
The operation of producing cup shaped parts from flat sheet metal blanks by bending and plastic flow of metal, is known as

Squeezing
Planishing
Drawing
Coining

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Workshop Technology
When the dimension is expressed as 20­ -0.025 ⁺⁰∙⁰³⁵, then the basic size is

19.975 mm
20.035 mm
20 mm
20.025 mm

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Workshop Technology
The parts of circular cross-section which are symmetrical about the axis of rotation are made by

Hot extrusion
Hot spinning
Hot drawing
Hot forging

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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

42 mm
44 mm
46 mm
48 mm

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Workshop Technology
In electric resistance welding, voltage required for heating is

6 to 10 volts
11 to 20 volts
50 to 100 volts
1 to 5 volts

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