Manufacturing And Production Technology
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.

2.17 rpm, 600 joules
6.8 rpm, 6 joules
5.03 rpm, 600 joules
22 rpm, 600 joules

ANSWER DOWNLOAD EXAMIANS APP

Manufacturing And Production Technology
In centreless grinding, work place centre will be

Below the line joining the two wheel centres
At the intersection of the line joining the wheel centres with the work place plane
Above the line joining the two wheel centres
On the line joining the two wheel centres

ANSWER DOWNLOAD EXAMIANS APP

Manufacturing And Production Technology
Glazing in grinding wheels takes place when the

Wheel is too soft or wheel revolves at a very slow speed
Wheel is too soft and wheel revolves at a very high speed
Wheel is too hard or wheel revolves at a very high speed
Wheel is too hard and wheel revolves at very slow speed

ANSWER DOWNLOAD EXAMIANS APP