131. Work speed of circular electrode of 220 mm diameter for carrying out seam welding at 4 welds per cm on 1.6 mm thick mild steel tube. Welding cycle consists of 3 cycles ‘on’ and 2 cycles ‘off’ Power supply is at 50 Hz. Calculate R.P.M. and energy requirement of the above circular electrodes assuming effective resistance between electrodes as 100 ohm.
132. Internal gears can be made by
133. What is the type of welding defect caused due to poor manipulation of weld rod or a dirty joint called?
134. The broaching operation in which the work moves past the stationary tool is called
135. The cutting speed for drilling __________ with high speed steel drills is 24 to 45 m/min.
136. Trepanning is an operation of
137. Lapping is an operation of
138. The saw milling is an operation of
139. The chamfering is an operation of
140. The grooving is an operation of
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