25. what is the recommended method for cleaning the base metal before gmaw welding?\na) sanding with fine…

25. what is the recommended method for cleaning the base metal before gmaw welding?\na) sanding with fine - grit paper\nb) using a wire brush or grinder\nc) wiping with a damp cloth\nd) applying a layer of paint\n26. which type of gmaw uses a continuously fed, consumable electrode wire that contains a flux core?\na) gmaw - p\nb) gmaw - a\nc) fcaw\nd) saw\n27. what does the term duty cycle refer to in gmaw equipment?\na) the time it takes to complete a weld\nb) the maximum current output of the welding machine\nc) the ratio of welding time to cooling time\nd) the type of shielding gas used\n28. when welding thicker materials with gmaw, which welding technique is often used to ensure proper penetration?\na) weaving\nb) stitching\nc) stringer bead\nd) circumferential bead\n29. what is the purpose of the ground clamp in gmaw welding?\na) hold the work piece in place\nb) provide electrical contact to complete the circuit\nc) control the shielding gas flow\nd) feed the welding wire\n30. which of the following is not a common gmaw process variation?\na) short circuit transfer\nb) spray transfer\nc) pulsed transfer\nd) tig transfer

25. what is the recommended method for cleaning the base metal before gmaw welding?\na) sanding with fine - grit paper\nb) using a wire brush or grinder\nc) wiping with a damp cloth\nd) applying a layer of paint\n26. which type of gmaw uses a continuously fed, consumable electrode wire that contains a flux core?\na) gmaw - p\nb) gmaw - a\nc) fcaw\nd) saw\n27. what does the term duty cycle refer to in gmaw equipment?\na) the time it takes to complete a weld\nb) the maximum current output of the welding machine\nc) the ratio of welding time to cooling time\nd) the type of shielding gas used\n28. when welding thicker materials with gmaw, which welding technique is often used to ensure proper penetration?\na) weaving\nb) stitching\nc) stringer bead\nd) circumferential bead\n29. what is the purpose of the ground clamp in gmaw welding?\na) hold the work piece in place\nb) provide electrical contact to complete the circuit\nc) control the shielding gas flow\nd) feed the welding wire\n30. which of the following is not a common gmaw process variation?\na) short circuit transfer\nb) spray transfer\nc) pulsed transfer\nd) tig transfer

Answer

Brief Explanations:

  • For question 25: Using a wire brush or grinder effectively removes contaminants from the base metal before GMAW welding.
  • For question 26: FCAW (Flux - Cored Arc Welding) uses a continuously fed, consumable electrode wire with a flux core.
  • For question 27: Duty cycle in GMAW equipment is defined as the ratio of welding time to cooling time.
  • For question 28: Weaving technique spreads heat for better penetration in thicker materials during GMAW.
  • For question 29: The ground clamp provides electrical contact to complete the circuit in GMAW.
  • For question 30: TIG transfer is not a common GMAW process variation; GMAW variations include short circuit, spray, and pulsed transfer.

Answer:

  1. C. Using a wire brush or grinder
  2. C. FCAW
  3. C. The ratio of welding time to cooling time
  4. A. Weaving
  5. B. Provide electrical contact to complete the circuit
  6. D. TIG transfer