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Workshop Technology

Workshop Technology
the most preferred process for casting gas turbine blades is

Investment moulding
Sand casting
Shell moulding
Die casting

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Workshop Technology
The temperature at which the new grains are formed in the metal is called

Upper critical temperature
Lower critical temperature
Eutectic temperature
Recrystallisation temperature

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

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

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Workshop Technology
A hacksaw blade cuts on the

Both forward and return strokes
Forward stroke
Cutting depends upon the direction of force
Return stroke

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Workshop Technology
In sheet metal blanking, shear is provided on punches and dies so that

Warping of sheet is minimized
Cut blanks is straight
Good cut edge is obtained
Press load is reduced

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Workshop Technology
An oxidising process used for aluminium and magnesium articles is called

Anodizing
Parkerising
Galvanizing
Sherardizing

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