CWB 2 All Module Exams Latest Update with Verified Solutions

CWB 2 All Module Exams Latest Update with Verified Solutions A Plasma is: A) A gas made up of positive ions and free electrons B) A liquid used to reduce adherence of spatter C) The main component in an inverter power source D) Always present in an electrical circuit A) A gas made up of positive ions and free electrons To increase melting rate (burn-off rate) in the shielded metal arc welding (SMAW) process, which polarity should be used? A) DCEP B) ACEP C) DCEN D) ACEP C) DCEN Which type of welding power source is used for the SMAW process? A) Constant Current B) Constant Voltage C) Pulsed Current D) Pulsed Voltage A) Constant Current The purpose of a drooping welding power source is to produce: A) Constant voltage regardless of the current demand B) Constant arc length regardless of current C) Nearly constant current regardless of voltage fluctuations B) Low open circuit voltage C) Nearly constant current regardless of voltage fluctuations A self-regulating welding arc is produced by a: A) Constant current power source with a constant speed wire feed system B) Constant voltage power source with a voltage sensing wire feed system C) Constant current power source D) Constant voltage power source with a constant speed wire feed system D) Constant voltage power source with a constant speed wire feed system Short circuit current is determined by the: A) Voltage in the circuit B) Static characteristic of the power source C) Position of welding D) Skill of the welder B) Static characteristic of the power source A Transformer is a device that: A) Transforms AC to DC B) Works only to change a DC voltage C) Changes the value of an AC voltage but does not change the frequency D) Is made from a semiconductor C) Changes the value of an AC voltage but does not change the frequency A Rectifier is a device that converts: A) DC current to AC current B) AC Current to a high value DC current C) DC current to a high value DC current D)