CWB Electrodes and Consumables
(Practice Test Questions) & Answers
100% Correct
According to the AWS, the nominal composition of a brown colour-coded tungsten
electrode is: - ANSWER-tungsten and 0.25% zirconium oxide (pure tungsten is green)
Alloyed tungsten electrodes have some advantages over pure tungsten electrodes. The
following is not one of those advantages: - ANSWER-lower electrode cost
Spray, globular and short-circuiting are terms used in GMAW welding to describe -
ANSWER-mode of metal transfer through the arc
True or false; The addition of cellulose to an electrode coating will improve the weld's
ductility. - ANSWER-True
True or false; Today, most mild steel electrodes have a wire core composed of semi-
killed steel. - ANSWER-False
In medium coated electrodes, the percentage of the electrode weight derived from the
coating is: - ANSWER-20% to 35%
The usable position for GMAW wires is not specified in the classification because it
depends on: - ANSWER-a. the shielding gas
b. the wire diameter
c. the mode of metal transfer
CSA standard W59 requires that the electrode holding ovens for low-hydrogen
electrodes be kept at a minimum temperature of: - ANSWER-120°C
When improved mechanical properties (toughness) of the weld metal deposit are
required, the flux should be formulated to transfer the smallest possible quantity of: -
ANSWER-Oxygen
When manufacturing fused fluxes, the temperature at which the ingredients are melted
together is: - ANSWER-1,500°C to 1,700°C
The primary function of cellulose as a coating ingredient is to provide: - ANSWER-
gaseous protection
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