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The carbon equivalent formula indicates:
The carbon equivalent formula indicates:A . Whether postweld heat treatment (PWHT) will be needed.B . Whether preheat will be needed.C . The theoretical carbon content of a steel.D . The weldability of a steel, based on carbon content.View AnswerAnswer: D
P-numbers are based on which of the following?
P-numbers are based on which of the following?A . Comparable base metal characteristicsB . Weldability characteristics of base metalC . Electrode characteristicsD . Chemical composition of the base metalView AnswerAnswer: B
The direction of magnetic flux can be confirmed by the use of a:
The direction of magnetic flux can be confirmed by the use of a:A . Pie gauge.B . Magnetic-field-sensitive crayon.C . Flux line sensitizer.D . Calibration gauge.View AnswerAnswer: A
A crack with its major axis oriented approximately perpendicular to the weld axis is called a:
A crack with its major axis oriented approximately perpendicular to the weld axis is called a:A . Lamellar crack.B . Non-directional crack.C . Transverse crack.D . Perpendicular crack.View AnswerAnswer: C
What increases when a welder increases the amperage?
What increases when a welder increases the amperage?A . VoltageB . Arc lengthC . HeatD . Travel speedView AnswerAnswer: C
Which welding process produces a fast-freezing weld pool and is generally suited for joining thin sections or root passes?
Which welding process produces a fast-freezing weld pool and is generally suited for joining thin sections or root passes?A . GMAW-SB . GTAWC . GMAWD . FCAWView AnswerAnswer: B
The simplest weldability tests are those that evaluate:
The simplest weldability tests are those that evaluate:A . Porosity and slag inclusions of the weld.B . Cracking and corrosion resistance of the weld.C . Strength and ductility of the weld.D . Ductility and hardness of the weld.View AnswerAnswer: C
What is the major cause of lack of fusion in all welding processes involving carbon steel?
What is the major cause of lack of fusion in all welding processes involving carbon steel?A . Inadequate preheatB . Improper welding speedC . Improper heat input and improper welding techniqueD . Not using a low hydrogen electrode or improper shieldingView AnswerAnswer: C
To reduce exposure to moisture of low-hydrogen electrodes after they have been removed from the manufacturer’s packaging, they should be stored:
To reduce exposure to moisture of low-hydrogen electrodes after they have been removed from the manufacturer’s packaging, they should be stored:A . Under low humidity conditions.B . In warm holding ovens.C . In sealed plastic containers.D . In tightly sealed ovens.View AnswerAnswer: B
In hardness testing of carbon steel weldment specimens, there is an approximate relationship between hardness and:
In hardness testing of carbon steel weldment specimens, there is an approximate relationship between hardness and:A . ToughnessB . Tensile strengthC . DuctilityD . Yield strengthView AnswerAnswer: B
