Workshop Technology
Which of the following welding method uses a pool of molten metal?

Carbon arc welding
Submerged arc welding
MIG arc welding
TIG arc welding

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Workshop Technology
In a simple die

Two or more operations are performed simultaneously at the single stroke of the ram
Two or more cutting operations are performed at one station of the press in every stroke of the ram
Both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram
None of the listed here

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Workshop Technology
The diaphragm moulding machine is used to

Produce uniform packing of sand in the mould
Give uniform sand hardness throughout the mould
Ram the sand harder at the back of the mould and softer on the pattern face
Ram the sand harder at the pattern face with decreasing hardness towards the back of the mould

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Workshop Technology
For arc welding

Direct current is used
Any one of these
Alternating current with high frequency is used
Alternating current with low frequency is used

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