Welding - SMAW (Shielded Metal Arc Welding)
*DCEN* Direct Current *Electrode* *Negative* - Referred to as straight *polarity* - Majority (or 70%) of heat is on work *piece* - Used for TIG welding aluminum
*DCEN* Direct Current _______ ______ - Referred to as straight ________ - Majority (or 70%) of heat is on work _____ - Used for TIG welding aluminum
*DCEP* Direct *Current Electrode* Positive - *Reverse* polarity - Majority (70%) of heat focused on *electrode* - Less Spatter - Used for stick welding aluminum
*DCEP* Direct _______ _______ Positive - _______ polarity - Majority (70%) of heat focused on ________ - Less Spatter - Used for stick welding aluminum
*Power Source* AC Machine - Does not weld *DC+, DC-* - Sometimes called *buzz box* - Usually has *more* power DC/AC machines - Welds *AC, DC-, DC+* - Uses a *rectifier* - Usually has *less* power
*Power Source* AC Machine - Does not weld ____, ____ - Sometimes called ____ _____ - Usually has _____ power DC/AC machines - Welds ____, _____, ____ - Uses a ______ - Usually has _____ power
A 2013 electrode has a tensile strength of *20,000* pounds.
A 2013 electrode has a tensile strength of _____________ pounds.
A properly run stick weld will sound like *greasy* bacon when the correct arc length is used.
A properly run stick weld will sound like "________" bacon when the correct arc length is used.
FALSE - A stick welder with a rectifier produces AC current only.
A stick welder with a rectifier produces AC current only. TRUE or FALSE
A transformer type stick welding only has *AC* current.
A transformer type stick welding only has *(AC or DC)* current.
A welder that is rated with 70% duty cycle will cool for *3 minutes* after its maximum operating temperature has been reached.
A welder that is rated with 70% duty cycle will cool for _________ minutes after its maximum operating temperature has been reached.
A welder that is rated with a 70% duty cycle can run for *7 continuous minutes* when the welder is turned to its maximum power.
A welder that is rated with a 70% duty cycle can run for _________ continuous minutes when the welder is turned to its maximum power.
An increased arc weld at the start of a weld is used to *preheat the base metal*
An increased arc weld at the start of a weld is used to a. Start the weld of in a cosmetically appeasing fashion b. Preheat the base metal c. Start arc blow
DCEP stands for *Direct Current Electrode Positive*
DCEP stands for _________ ___________ ____________ ___________
TRUE - Dunking a just run weld in water can cause the weld to crack.
Dunking a just run weld in water can cause the weld to crack. TRUE or FALSE.
TRUE - Lack of overlap will cause slag to be trapped.
Lack of overlap will cause slag to be trapped. TRUE or FALSE
The Usability of the electrode including the type of current, penetration, covering and slag, and iron-powder content is indicated by the *last digit* of the rod number.
The Usability of the electrode including the type of current, penetration, covering and slag, and iron-powder content is indicated by the first *digit/last digit* of the rod number.
TRUE - The letter E indicates both electrode and the numerals following identify characteristics of the filler metal for arc welding in a rod identified as E7018.
The letter E indicates both electrode and the numerals following identify characteristics of the filler metal for arc welding in a rod identified as E7018. TRUE or FALSE
The second bead of a three bead T weld should overlap the first bead by *2/3.*
The second bead of a three bead T weld should overlap the first bead by ________.
*6010* electrode is more sensitive to arc length
What electrode is more sensitive to arc length, 6010 0r 6013?
Number 1
What identifies an electrode that can be used in the flat and horizontal fillet positions?
Dimensions of top plate
What is the standard leg dimensions of lap weld?
heat dissapation
Why should you alter sides of a T joint when you are welding it?
