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Workshop Technology

Workshop Technology
In backhand welding, the angle between the welding torch and the work is kept as

30°-40°
40°-50°
50°-60°
60°-70°

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Workshop Technology
The material which can be best cut with oxygen cutting process is

Brass
Aluminium
Copper
Mild steel

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Workshop Technology
The surface to be left unmachined is marked on the pattern by

Black colour
Red colour
Blue colour
Yellow colour

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Workshop Technology
The electrode tip diameter (d) in spot welding should be equal to (where t = Thickness of plate to be welded)

3 t
1.5 t
√t
6 t

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Workshop Technology
The instrument used to measure external and internal diameter of shafts, thickness of parts and depth of holes, is

Vernier caliper
Outside micrometer
Depth gauge micrometer
Inside micrometer

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Workshop Technology
In welding magnesium with TIG arc welding, direct current with ________ is used.

Straight polarity
Reversed polarity
Both (A) and (B)
None of these

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