GMAW FCAW and MCAW groove welds Flashcards
What are two advantages of using more than one process to complete a weld?
a. the cost of welding is reduced in many cases if the advantages of each process are applied to the fabrication.
b. it increases production while maintaining the high quality weld material.
What is the root pass, and where is it located on a VEE groove joint preparation?
The root pass is the first penetrating baed. it is placed at the root of the joint.
The electrode wire type is selected to match the:
a) shielding gas
b) welder’s preference
c) thickness of the parent metal
d) chemical and mechanical properties of the base metal.
d) chemical and mechanical properties of the base metal.
What is the recommended electrode angle on a groove weld?
a) 1/4 of the included angle
b) 1/2 of the included angle
c) 3/4 of the included angle
d) the same as the included angle
b) 1/2 of the included angle
What is the recommended inclination for the FCAW fill passes in the 1G position?
a) forehand 10degree - 30 degree
b) forehand 90 degree
c) backhand 0 degree -10 degree
d) backhand 90 degree
c) backhand 0 degree -10 degree
What is the recommended inclination for the MCAW fill/cap passes in the 2G position?
a) forehand 0 degree - 10 degree
b) forehand 45 degree
c) backhand 45 degree
d) backhand 20 degree - 30 degree
a) forehand 0 degree - 10 degree
What mode of metal transfer is used with FCAW?
a) pulsed spray
b) spray
c) short circuit
d) globular
d) globular
What mode of metal transfer is used with MCAW in the 3G position?
a) pulsed spray
b) spray
c) short circuit
d) globular
a)pulsed spray
Name four (4) factors that can influence for meter settings with GMAW and FCAW
Any 4 of the following is correct:
a. type and thickness of material to be welded
b. position of weld
c. type of joint
d. diameter of wire
e. puddle size
f. air movement around the weld zone
g. gun inclination
h. nozzle-to-work distance
List four (4) GMAW welding parameters.
Any 4 of the following is correct:
a. shielding gas type
b. shielding fas flow rate
c. wire speed setting
d. voltage setting
e. transfer mode.
What type of equipment set-up is recommended for high production welding using GMAW and FCAW or MCAW?
a) constant current power source, dual drive roll wire feeder
b) constant voltage power source, dual drive roll wire feeder
c) constant current power source, single drive roll wire feeder
d) constant voltage power source, single drive roll wire feeder
b)constant voltage power source, dual drive roll wire feeder
What type of interpose cleaning is normally required between the GMAW root pass and FCAW or MCAW deposited weld metal?
a) grind to clean weld metal before proceeding
b) de-slag before proceeding
c) hand brush before proceeding
d) interpose cleaning is not normally required.
d) interpose cleaning is not normally required.
Explain why it is important to always start at the bottom and layer upwards when placing stinger bead fill and cap passes in the 2G position.
This prevents weld metal from rolling down and causing overlap or lack of fusion.
