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EQUIPMENT FOR RESISTANCE WELDING
The equipment for resistance welding is different from that for arc welding for the following reasons: Resistance welding machines are complicated and very costly. Automation and controls are more in these. Many resistance welding equipments are custom - built. The machines can be operated with single phase or three phase mains. The equipment may be direct energy or stored energy machines. All the resistance welding machines require a low voltage, high current output (current in the order of thousand to lakhs of amperes). Four main constituents are:1. Electrical Power source2. Mechanical system3. Control equipment4. Feeding system
Jewels can only be removed for polishing from either end of the necklace
(a) Illustrate why a rich mixture is required for the following (i) idling (ii) sudden acceleration (iii) Maximum power (b) A simple jet carburetor is required to supply 5Kg
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Evaluate velocity of the block: A block of 2500N rest on horizontal surface. The coefficient of friction in between block and plane is 0.3. The block can be pulled by the for
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Find out the centroid of the shaded : Find out the centroid of the shaded area shown in Figure Solution Net area of shaded portion of Figure = The area of full
Determine the centroid of the area: Determine the centroid of the area OBDC Solution The trapezium area is divided in two simple areas, (i) A 1 = Rectangle
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