To increase the melting rate (burn-off rate) of a SMAW electrode, which polarity
would you use? - ans -DCEN
Is it possible to operate a wire-feed welding process using constant current? - ans
-Yes - but you must use a voltage-sensing wire-feeder to obtain a self-regulating
arc.
A transformer is a device that:
(A) transforms AC to DC
(B) transforms DC to AC
(C) changes the value of AC - ans -(C) changes the value of AC
A rectifier is a device that:
(A) transforms AC to DC
(B) transforms DC to AC
(C) changes the value of AC - ans -(A) transforms AC to DC
I = V/R and V = IR
are examples of what law? - ans -Ohm's Law
In Ohm's Law (I = V/R), what do each of the letters mean?
- ans -I = Current (in amps)
R = Resistance (in ohms)
V = Voltage (in volts)
What benefit to the weld deposit does cellulose provide in a SMAW electrode
coating? - ans -Improves ductility
The impact toughness of the weld deposit for the
, B-G 49A 3C G6 (ER49S-6) electrode is:
(A) not specified
(B) 27 J at 0 degrees Celsius
(C) 27 J at -30 degrees Celsius
(D) 27 J at -6 degrees Celsius
- ans -(C) 27 J at -30° Celsius
The result of increased nitrogen content in the final weld deposit will be:
The tensile value of an electrode designation is typically designated by CSA in
____.
(A) kPa
(B) MPa
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