Workshop Technology
The adhesiveness is the property of sand due to which

The sand grains stick together
None of these
It clings to the sides of a moulding box
It evolves a great amount of steam and other gases

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Workshop Technology
The welding set up is said to have straight polarity, when

Work is connected to the negative terminal and the electrode holder is earthed
Work is connected to the positive terminal and the electrode holder is earthed
Work is connected to the positive terminal and the electrode holder to the negative terminal
Work is connected to the negative terminal and the electrode holder to the positive terminal

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