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Workshop Technology

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

Die casting
Shell moulding
Sand casting
Investment moulding

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Workshop Technology
In welding copper alloys with TIG arc welding

Any one of the listed here
Direct current with reversed polarity is used
Alternating current is used
Direct current with straight polarity is used

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Workshop Technology
The recrystallisation temperature of steel is

None of these
400°C
600°C
800°C

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Workshop Technology
In forehand welding, the angle between the welding rod and the work is kept as

40°-50°
50°-60°
60°-70°
30°-40°

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Workshop Technology
In a four high rolling mill, there are four rolls out of which

Two are working rolls and two are backing up rolls
Three are working rolls and one is backing up roll
All of the four are working rolls
One is working roll and three are backing up rolls

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Workshop Technology
If an aluminium pattern made from a wooden master pattern is to be used for grey iron castings, then the shrinkage allowance allowed on the wooden pattern should be

16 mm/m
20 mm/m
26 mm/m
10 mm/m

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