CSWIP 3.1 Multiple Choice Paper 1

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  1. An MMA electrode which is classified as an E6013 (according to AWS A5.1) is a:
  • Basic type
  • Cellulose type
  • Rutile type
  • Thick coated iron powder type
  1. Which polarity is normally used for GTAW welding of aluminium?
  • AC
  • DC electrode negative
  • DC electrode positive
  • It would make little difference which was used
  1. A code gives the acceptance standard for excess weld metal “h” as h<=1mm+0.1b, max. 5mm; which “b” is the width of the weld cap. For which of the following situations is the excess weld metal acceptable?
  • b = 15 h = 3.0
  • b = 22 h = 3.0
  • b = 28 h = 4.0
  • b = 40 h = 5.4
  1. A fillet weld has a design throat thickness of 8mm. That is the minimum leg length that is required?
  • 5.6mm
  • 11.2mm
  • 11.8mm
  • It can not be determined from the information given
  1. The number 111 is shown at the tall-end of a weld symbol reference line. According to BS EN ISO 2553. What does this number indicate?
  • Welding process
  • Type of welding electrode
  • Welding position
  • Total weld length
  1. Which of the following alloying elements is used mainly to improve the toughness of steels?
  • Chromium
  • Manganese
  • Sulphur
  • Carbon
  1. When MIG/MAG welding, wire feed speed is proportional to:
  • Travel speed
  • Welding current
  • Arc length
  • Inductance
  1. An electrode is classified to BS EN 499 as E 35 3 B. What does 35 ?
  • 350 N/mm2 yield strength
  • 35 Joules at 30 degree C
  • 350 N/mm2 tensile strength
  • 35kpsi tensile strength
  1. A large diameter pipe with a wall thickness of 10mm is to be used for a cross country pipeline. Which electrode type could be used to combine high welding speed and deep penetration?
  • Basic covered
  • Cellulosic covered
  • Rutile covered
  • Iron power loaded
  1. Which NDT method is associated with the use of a yoke?
  • Radiographic testing
  • Helium leak testing
  • Magnetic particle testing
  • Ultrasonic testing
  1. A transverse tensile test piece from a weld joint will give the:
  • Tensile strength of the weld
  • Tensile strength of the joint
  • Stress/strain characteristics of the weld
  • Stress/strain characteristic of the joint
  1. Weldments in carbon-manganese steels, made by low heat input welding may shown
  • Greater ductility
  • Higher distortion
  • Higher dilution
  • Higher hardness
  1. When measuring arc length voltage, where should be measure at
  • Across the terminals of the power source
  • Across the arc and as near practical to the arc
  • Across the power source positive terminal and earth cable
  • It does not matter – anywhere in the circuit
  1. A drawing with symbols to BS EN ISO 2553 will show a 5 mm leg fillet by which of the following:
  • a5
  • s5
  • z5
  • 5z
  1. Using a stabilized stainless steel will reduce the risk of:
  • Excessive distortion
  • Weld decay
  • Formation of iron-sulphides
  • Sour service cracking
  1. Standard oxy-fuel gas cutting equipment can be applied to:
  • Aluminum alloys
  • Carbon steel
  • Austenitic stainless steel
  • Copper
  1. Which of the following types of imperfection is generally considered to be the most serious?
  • Surface breaking planar
  • Root concavity
  • Buried planar
  • Surface breaking non-planar
  1. Weldment in carbon-manganese steels, made using a heat input higher than the maximum specified by the WPS, may show:
  • Higher integrity
  • Lower distortion
  • Lower toughness
  • Higher hardness
  1. The output characteristic of typical MIG/MAG set is
  • Constant voltage
  • Constant current
  • Drooping
  • Pulsing
  1. Which of the following standards is concerned with welder approval?
  • ISO 2533
  • ISO 15614
  • ISO 2553
  • ISO 9606
  1. A long centerline crack has been detected in a submerged arc weld bead this may be due to
  • Use of a high manganese filler wire
  • Use of a damp flux
  • Weld bead is deep and narrow
  • Use of too high voltage
  1. A steel designated as “Z” quality will have:
  • Through-thickness ductility values > 20%
  • Through- thickness ductility values <20%
  • Been specially heat treated
  • Zirconium added to improve weldability
  1. The penetrating power of an X-ray set is expressed in:
  • Curies
  • kV
  • IQI values
  • The number after the isotope type
  1. The included angle used for MMA welding of a 15mm thick steel single V butt joint is most likely to be:
  • 35 Deg.
  • 120 Deg.
  • 70 Deg.
  • 90 Deg.
  1. Which of the following is not a fusion welding process?
  • Friction welding
  • Gas tungsten arc welding
  • Resistance welding
  • Laser welding
  1. A typical baking temperature for basic low hydrogen electrodes is:
  • 120 Deg. C.
  • 350 Deg. C.
  • 500 Deg. C.
  • 200 Deg. C.
  1. Burn through may occur because the:
  • Current is too high.
  • Root gap is too small.
  • Root face is too small.
  • Current is to low.
  1. Which of the following defects will have the more severe effect on the load-bearing capacity of a weld?
  • Undercut.
  • Incompletely filled groove.
  • Irregular width.
  • Excess penetration.
  1. While inspecting a weld on a 100mm thick high carbon steel plate with a … the weld is visually acceptable, however the parent material has severse … the weld approximately 3mm deep, what course of action would you …
  • None, I am only inspecting the weld.
  • Recommend that the area be dressed smooth.
  • Recommend that the area be dressed smooth followed by MPI.
  • High carbon steel is not susceptible to cracking so I would weld over.
  1. Which of these statements are true concerning Lamellar tearing?
  • As hydrogen levels increase Lamellar tearing is more likely.
  • As material thickness increases ductility decreases making Lamellar tearing more likely.
  • Lamellar tearing occurs in the HAZ.
  • Lamellar tearing affects all joint types.

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Pls, check again Q30. My Answer is (b) : As material thickness increases ductility decreases making Lamellar tearing more likely.
As definition of Lamellar Tearing : It occur closed to but just outside of HAZ

1 Like

Yes, answer c, d are wrongly !!!

Thanks @mr.lebienthuy, answer should be b as your comments.
The answer had updated in the answer sheet here.

Why B not C

Yes, Lamillar tearing not occur on HAZ area.

Question 25: I think there are 2 answers , a &d as both Friction and Resistance weldings are Pressure weldings (not fusion).

ERW is a fusion welding process.