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Workshop Technology

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

Yellow colour
Blue colour
Black colour
Red colour

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Workshop Technology
In a gas welding of mild steel using an oxyacetylene flame, the total amount of acetylene consumed is 10 litres. The oxygen consumption from the cylinder is

20 litres
15 litres
10 litres
5 litres

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

Blue colour
Red colour
Black colour
Yellow colour

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Workshop Technology
Cast iron and steel pipes are produced by

Slush casting
True centrifugal casting
Investment casting
Die casting

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Workshop Technology
Cold working of metal increases

Yield strength
All of these
Hardness
Tensile strength

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

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

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