Workshop Technology
In a ___, the molten metal is poured and allowed to solidify while the mould is revolving.

Die casting method
Centrifugal casting method
Permanent mould casting method
Slush casting method

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Workshop Technology
For arc welding

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

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Workshop Technology
A three high rolling mill consists of three rolls placed one above the other. Which of the following statement is correct?

The upper and middle rolls rotate in the same direction whereas the bottom roll rotates in opposite direction
The bottom and middle roll rotate in the same direction
The upper and bottom rolls rotate in the same direction whereas the middle roll rotates in opposite direction
Any one of the above

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