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Workshop Technology

Workshop Technology
Which one of the following material will require the largest size of riser for the same size of casting?

Cast iron
Copper
Aluminium
Steel

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Workshop Technology
A zinc diffusion process is called

Galvanizing
Anodizing
Parkerising
Sherardizing

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

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

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Workshop Technology
Cold working of metal increases

Hardness
All of these
Tensile strength
Yield strength

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Workshop Technology
Aluminium is the best material for making patterns because it is

Light in weight
Easy to work
Corrosion resistant
All of the listed here

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Workshop Technology
Tandem drawing of wires and tubes is necessary because

Accuracy in dimensions is not possible otherwise
It is not possible to reduce at one stage
Surface finish improves after every drawing stage
Annealing is needed between stages

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