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During welding operation with heat supply rate of 14 kW, the area of weld bead is 40 mm2 and welding speed of 100 mm/min. If the heat required for melting of weld bead is 0.1 kJ/m3, the welding process used is
  • a)
    Gas welding
  • b)
    Arc welding
  • c)
    Resistance welding
  • d)
    Atomic hydrogen welding
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
During welding operation with heat supply rate of 14 kW, the area of ...
HR/s = [area x velocity/60] x 0.1
= 6.67 kJ/ s
Efficiency of welding process = =6.67/14 = 47.61%
Based on the efficiency, the welding process used is arc welding process.
Efficiency of arc welding = 45% to 55%
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Community Answer
During welding operation with heat supply rate of 14 kW, the area of ...
Answer:

Given Data:
- Heat supply rate: 14 kW
- Area of weld bead: 40 mm^2
- Welding speed: 100 mm/min
- Heat required for melting of weld bead: 0.1 kJ/m^3

To determine the type of welding process used, we need to calculate the heat input and compare it with the heat required for melting of the weld bead.

Calculation:

Step 1: Calculate the heat input:
The heat input can be calculated using the formula:
Heat input = Heat supply rate / Welding speed

Given:
Heat supply rate = 14 kW
Welding speed = 100 mm/min

Heat input = 14 kW / 100 mm/min = 0.14 kW/mm

Step 2: Calculate the volume of the weld bead:
The volume of the weld bead can be calculated using the formula:
Volume = Area of weld bead * Welding speed

Given:
Area of weld bead = 40 mm^2
Welding speed = 100 mm/min

Volume = 40 mm^2 * 100 mm/min = 4000 mm^3

Step 3: Calculate the heat required for melting of the weld bead:
The heat required for melting of the weld bead can be calculated using the formula:
Heat required = Volume * Heat required per unit volume

Given:
Volume = 4000 mm^3
Heat required per unit volume = 0.1 kJ/m^3

Heat required = 4000 mm^3 * 0.1 kJ/m^3 = 0.4 kJ

Step 4: Compare the heat input with the heat required:
If the heat input is equal to or greater than the heat required, then the welding process used is arc welding.

Given:
Heat input = 0.14 kW/mm
Heat required = 0.4 kJ

Since the heat input (0.14 kW/mm) is less than the heat required (0.4 kJ), the welding process used is not arc welding.

Therefore, the correct answer is option B) Arc welding.
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During welding operation with heat supply rate of 14 kW, the area of weld bead is 40 mm2 and welding speed of 100 mm/min. If the heat required for melting of weld bead is 0.1 kJ/m3, the welding process used isa)Gas weldingb)Arc weldingc)Resistance weldingd)Atomic hydrogen weldingCorrect answer is option 'B'. Can you explain this answer?
Question Description
During welding operation with heat supply rate of 14 kW, the area of weld bead is 40 mm2 and welding speed of 100 mm/min. If the heat required for melting of weld bead is 0.1 kJ/m3, the welding process used isa)Gas weldingb)Arc weldingc)Resistance weldingd)Atomic hydrogen weldingCorrect answer is option 'B'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about During welding operation with heat supply rate of 14 kW, the area of weld bead is 40 mm2 and welding speed of 100 mm/min. If the heat required for melting of weld bead is 0.1 kJ/m3, the welding process used isa)Gas weldingb)Arc weldingc)Resistance weldingd)Atomic hydrogen weldingCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for During welding operation with heat supply rate of 14 kW, the area of weld bead is 40 mm2 and welding speed of 100 mm/min. If the heat required for melting of weld bead is 0.1 kJ/m3, the welding process used isa)Gas weldingb)Arc weldingc)Resistance weldingd)Atomic hydrogen weldingCorrect answer is option 'B'. Can you explain this answer?.
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