Chapter 13 & 14 Flashcards
- During welding, the electrode covering extends beyond the metal core and serves:
A) to insulate the molten metal against the air
B) to spread out the arc stream
C) as the filler metal for the weld
D) to direct and concentrate the arc stream
E) to prevent slag formation
A) to insulate the molten metal against the air
- A typical low hydrogen rod is:
A) E-7014 B) E-6010 C) E-7018 D) E-6011 E) E-6013
C) E-7018
- According to the AWS classification system for low carbon steel electrodes, and using E7018 as the example, what does the “E” signify?
A) electric arc welding
B) electrode
C) every use
D) current and polarity
B) electrode
- According to the AWS classification system for low carbon steel electrodes, and using E7018 as the example, what does the “70” signify?
A) welding position
B) tensile strength
C) electrode coating, current and polarity
D) metal thickness
B) tensile strength
- According to the AWS classification system for low carbon steel electrodes,and using E7018 as the example, what does the “1” signify?
A) welding position
B) tensile strength
C) electrode coating, current and polarity
D) metal thickness
A) welding position
- According to the AWS classification system for low carbon steel electrodes, and using E7018 as the example, what does the “8” signify?
A) welding position
B) tensile strength
C) electrode coating, current and polarity
D) metal thickness
C) electrode coating, current and polarity
- The submerged arc welding process (SAW) is a high deposition, high quality welding process widely used to join _____ sections in the flat horizontal position.
A) thin
B) thick
C) butt
D) beveled
B) thick
- In submerged arc welding, the arc is not visible to the operator since it:
A) produces an excessive amount of slag B) takes place in the flux feeder tube C) requires a full helmet be worn D) takes place below the flux E) must be done in the dark
D) takes place below the flux
- In submerged arc welding, the electrode is:
A) fed continuously from a coiled spool B) covered with a cellulose coating C) covered with iron powder D) made of finely crushed mineral E) known as flux
A) fed continuously from a coiled spool
- Flux is:
A) a substance to decrease the applied voltage
B) a substance to remove oxides and impurities
C) a substance on the electrode to protect it from moisture and rusting
D) a substance applied to the inside of a pipe joint to aid alignment
E) a substance to shield the weld from the atmosphere
B) a substance to remove oxides and impurities
- _____ welding keeps the atmosphere from the weld bead by a blanket of granular flux.
A) fusion B) shielded metal arc C) machine D) submerged arc E) manual
D) submerged arc
- The _____ joins metal by the heat of an arc between a nonconsumable tungsten electrode and the work piece, with or without the addition of filler metal.
A) submerged arc welding process (SAW)
B) gas tungsten arc welding process (GTAW)
C) gas metal arc welding process (GMAW)
D) reverse metal arc welding process (RMCW)
B) gas tungsten arc welding process (GTAW)
- GTAW is particularly suited to the welding of _____ metals.
A) similar
B) exotic
C) dissimilar
D) cast
C) dissimilar
- The _____ is an arc welding process, which produces the fusion of metals by heating them with an arc between a continuous filler metal (consumable) electrode and the work.
A) submerged arc welding process (SAW)
B) gas tungsten arc welding process (GTAW)
C) gas metal arc welding process (GMAW)
D) reverse metal arc welding process (RMCW)
C) gas metal arc welding process (GMAW)
- _____ is the only arc welding process capable of welding all commercial ferrous and non ferrous alloys.
A) submerged arc welding process (SAW)
B) gas tungsten arc welding process (GTAW)
C) gas metal arc welding process (GMAW)
D) reverse metal arc welding process (RMCW)
C) gas metal arc welding process (GMAW)
- The arc and molten weld metal is protected from the atmosphere by a flow of _____ or reactive gas.
A) air
B) inert
C) non inert
D) hydrogen
B) inert
- The GMAW process is well suited to the _____ passes, on pipe welding.
A) final
B) mid
C) root
D) under
C) root
- On pipe larger than 51 mm, the ends are normally _____ welded together.
A) lap
B) butt
C) electrode
D) fit
B) butt
- During the process of welding, _____ are set up in both the weld metal and in the base metal, adjacent to the weld.
A) stresses
B) cracks
C) inclusions
D) checks
A) stresses
- One of the ways to minimize _____ in the welded joint is to preheat the parts to be welded.
A) cracks
B) stresses
C) inclusions
D) checks
B) stresses
- Postweld heat treatment, often called _____ relieving, consists of uniformly heating the welded parts to a temperature sufficient to relieve most of the stresses created by the welding process.
A) cracks
B) stresses
C) inclusions
D) checks
C) inclusions
- _____ is a melting away of the parent metal which can alter reduce the thickness of the welded joint.
A) fusion
B) undercut
C) overlap
D) underfill
B) undercut
- Lack of _____, or more precisely, incomplete joint penetration, is a group of weld discontinuities where fusion did not occur between weld metal and the base metal or between overlapping weld beads.
A) fusion
B) undercut
C) overlap
D) underfill
A) fusion
- _____ is an excess of deposit metal, which is not fused to the base metal.
A) fusion
B) undercut
C) overlap
D) underfill
C) overlap
- _____ is insufficient weld deposit, resulting in a reduction in the thickness of the groove.
A) fusion
B) undercut
C) overlap
D) underfill
D) underfill
- _____ is spherical or tubelike defects, cavities, or voids caused by gases trapped inside the weld axes that have evolved to the surface.
A) porosity
B) slag inclusions
C) cracks
D) checks
A) porosity
- _____ are solid non metallic inclusions entrapped below the surface in the weld metal or more often, between deposited weld metal and the base metal.
A) porosity
B) slag inclusions
C) cracks
D) checks
B) slag inclusions
- Planar type defects, such as _____ and lack of fusion, are sharp and pointed in shape and create severe notching and high potential for failure.
A) porosity
B) slag inclusions
C) cracks
D) checks
C) cracks
- To ensure the electrodes function as designed, they must be kept in baking ovens to remove any _____.
A) hydrogen
B) moisture
C) carbon
D) inert
B) moisture
- A _____ is a non destructive test method that shows defects in the interiors of the welds that would not be visible to the eye.
A) dye penetrant test B) tensile test C) bending test D) radiographic inspection E) ultrasonic inspection
D) radiographic inspection
- _____ makes use of short wavelength radiations such as X-rays and gamma rays to penetrate the weld.
A) ultrasonic inspection B) radiographic inspection C) tensile testing D) dye penetrant testing E) binding testing
B) radiographic inspection
- A dye penetrant test will show up:
A) porosity B) interior defects C) inclusions D) cracks and faults E) undercutting
D) cracks and faults
- _____ involves directing high frequency sound waves into the metal to detect fine cracks and defects.
A) dye penetrant testing B) radiographic inspection C) gamma ray inspection D) tensile testing E) ultrasonic inspection
E) ultrasonic inspection
- Magnetic particle testing (MT) is an _____ technique for detecting flaws that are either surface, or subsurface.
A) nondestructive
B) destructive
C) radiographic
D) ultrasonic
A) nondestructive
- Where a person intends to construct, alter or repair any boiler, pressure vessel, fitting or pressure piping system by welding, he shall comply with the requirements of the ASME boiler and pressure vessel code, section IX welding and brazing qualifications, as adopted in section 5(1)(d) of this regulation.
A) true
B) false
A) true
- The _____ must present a pressure welder’s certificate of competency, as proof of eligibility to take the performance qualification test.
A) welder
B) manufacturer
C) owner
D) operator
A) welder
- _____ are intended to determine the ability of welders and welding operators to make sound welds.
A) tensile tests B) bending tests C) usual inspections D) hydrostatic tests E) performance qualification tests
E) performance qualification tests
- Procedure qualification destructive tests are laid out in:
A) section I of the ASME code B) section VII of the ASME code C) section IX of the ASME code D) section IV of the ASME code E) the CSA b51
C) section IX of the ASME code
- When a welder passes the required test, as set out in the ASME code, he is issued with a:
A) journeyman's welding ticket B) power engineering certificate C) performance qualification card D) pressure welder's certificate E) manufacturer's license
C) performance qualification card
