SMAW ELECTRODES
The bead in SMAW is formed by the
Flux coating
An example of a deep-penetrating SMAW electrode, such as one that would be used for poorly prepared surfaces or joints, is
E6010
Which of the following electrodes would be the best choice for medium- or high-carbon steels
E7018
The harmful oxygen and hydrogen present in the atmosphere surrounding a molten SMAW weld is pushed away by the
gaseous shield of carbon dioxide
_________is the ability to verify that a procedure has been followed by reviewing the documentation step-by-step
Traceability
which American Welding Society (AWS) specification (s) cover the most common electrodes for welding carbon (mild) steel and low-alloy, high strength steels?
A5.1 and A5.5
Welding in vertical and overhead position should not be attempted with SMAW electrodes larger then 3/16" in diameter unless the electrode is classified as
low-hydrogen (F4)
The exposure time for low-hydrogen electrodes, per AWS standards, typically ranges
1/2 hour to 4 hours
Welding current is transferred from the electrode holder and into the workpiece through the
wire core of the electrode
An electrode that is carefully manufactured to contain little or no moisture is called a (n)
Low-hydrogen electrode
The rated tensile strength of the deposited weld metal from an E7018 electrodes is
70,000 psi
After a sealed container of low-hydrogen SMAW electrodes must be stored in an appropriate oven at a minimum temperature setting of
250
All-position electrodes that provide deep penetration belong to which electrode group?
F3 fast-freeze
A container that is closed airtight is said to be
Hermetically sealed
A (n) ______ is a metal that has had other elements added to it that substantially change its mechanical properties
Alloy
All SMAW electrodes used for code-governed work must have the AWS classification number printed on them as well as on the
Container in which they are shipped
Low-hydrogen electrodes that have been exposed to liquid water should be
disposed of
The traceability requirement of filler metals vary according to
the client requirement and job specifications
The process in which water vapor from the atmosphere returns to its liquid state is called
Condensation
The part of a base metal that has been altered but not melted by the heat is called the
Heat
Electrodes with powdered iron in their flux belong to the
fast-fill (F1) electrode group
How many times can electrodes that have exceeded their maximum period exposure be dried
once
The purpose of the specifications written by the American Welding Society (AWS) is to set standard that all manufacturers must follow when manufacturing
welding consumable
Welding upward or downward is called
Vertical welding
___________is the ability of a material to resist breaking at point where stress is concentrated
Notch toughness