List of top Production Engineering (Manufacturing) Questions asked in GATE PI

In a direct current arc welding, the voltage \( V \) (in volt) is related to the arc length \( l \) (in cm) as \[ V = 30 + 30l. \] The open circuit voltage is 80 volts. The maximum possible arc length is ............. (Rounded off to two decimal places)
Exit-hole occurrence is common in:
Which among the following is/are TRUE for friction stir welding (FSW) process?
To create 12 divisions on a disc by using simple indexing and dividing head on a horizontal milling machine, choose the correct option for the rotation of the crank pin.
Which one of the following pure metals has the hexagonal close packed (HCP) crystal structure at room temperature?