120302B Flashcards
(31 cards)
What is the included angle for the prep material?
60° included
30° angle is relevant for the preparation of the material.
What polarity is used for DCEN/Standard?
DCEN
This is a type of direct current polarity used in welding.
What is the conical taper specification?
2-6xD
1/4- 3/4”, extension 1/4”
This refers to the tapering of the weld or joint, specified in relation to diameter.
What is the range of inclination for the included angle?
0°-15°
This range indicates the allowable inclination for the angle during the welding process.
How close should the electrode be to the puddle?
As close as possible
This instruction emphasizes the importance of maintaining proximity to the weld pool.
Fill in the blank: The material preparation angle is _______.
30°
True or False: The tack angle specified is 10°.
False
The tack angle specified is actually 5°.
What is the role of a welder?
A welder reinforces material and helps strengthen the joint.
Example: A welder uses specific techniques to ensure the quality of the weld.
What does DCE stand for?
DCE stands for Direct Current Electrode.
Example: DCE is used in various welding applications.
What is the effect of DCEN on welding?
DCEN increases metal deposition and penetration.
Example: Using DCEN can improve the quality of the weld.
What does ASME stand for?
ASME stands for the American Society of Mechanical Engineers.
Example: ASME provides specifications for welding procedures.
What is a PQR?
A PQR is a Procedure Qualification Record that documents completed welds.
Example: A PQR ensures that the welding process meets quality standards.
What is the significance of back purge in welding?
Back purge is used to remove oxygen to prevent contamination.
Example: Back purge is applied on the root side of the weld.
What type of material is commonly used for welding stainless steel pipes?
Stainless steel is commonly used for welding stainless steel pipes.
Example: Welders prefer stainless steel for its corrosion resistance.
What is the purpose of venting during welding?
Venting is needed to avoid blockages and ensure proper airflow.
Example: Proper venting helps maintain a safe welding environment.
What is the starting point for smaw electrode?
Electrode (1/8= 0.125= 125amps)
What does the term ‘backhand’ refer to in this context?
Direction of travel/ inclination
What is the maximum dimension for flaw?
2.6 (1/8)
What should be done with material before cutting?
Select proper cutting tip
0-10° forehand when cutting
Thinner material= more inclination
What is the shape cutting dependent on?
Perpendicular.
What is the minimum oxygen purity required?
99.5
What fuel has the highest BTU content?
Propane
What color is the oxygen hose
Green
