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Standard X

Physics

Electric Circuit and Circuit Diagram

A 900 mm long...

Question

A 900 mm long steel plate is welded by a manual metal arc welding process using welding current of 150 A, arc voltage of 20 V and welding speed of 300 mm/min. If the process efficiency of is 0.8 and surface resistance is 36 micro-ohm, the heat input in J/mm

116.5 J

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146 J

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600 J/mm

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480 J/mm

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Solution

The correct option is D 480 J/mm
$Heat input to weld = η . \frac{V I}{v} = \frac{0.8 \times 20 \times 150}{300 / 60}$

$= 480 J / m m$

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A 900 mm long steel plate is welded by a manual metal arc welding process using welding current of 150 A, arc voltage of 20 V and welding speed of 300 mm/min. If the process efficiency of is 0.8 and surface resistance is 36 micro-ohm, the heat input in J/mm

The correct option is D 480 J/mmHeat input to weld =η.VIv=0.8×20×150300/60 =480J/mm

The correct option is D 480 J/mm
$Heat input to weld = η . \frac{V I}{v} = \frac{0.8 \times 20 \times 150}{300 / 60}$

$= 480 J / m m$