CSWIP 3.1 Multiple Choice Paper 9

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  1. A preliminary Welding Procedure Specification for qualifying a welding procedure test weld are:
  • WPS
  • pWPS
  • uWPS
  • pWPT
  1. Which defect would you expect to obtain in TIG welds in non-deoxidized steel?
  • Under cut
  • Porosity
  • Tungsten inclusions
  • Linear misalignment
  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 powder loaded
  1. If the maximum inter-pass temperature is exceeded in a carbon manganese butt weld … affected most
  • Hardness
  • Toughness
  • Fusion
  • Penetration
  1. A MMA electrode which is classified as an E7024 (according to AWS) is a:
  • Basic type
  • Cellulosic type
  • Rutile type
  • Thick coated iron powder
  1. When using DC+ve polarity, what is the typical OCV?
  • 20V
  • 50V
  • 90V
  • 240V
  1. On inspecting a completed 150mm OD pipe weld some small smooth, shallow areas of undercut have been found < 0.25mm deep. The welder says he can quickly put this right by depositing a thin narrow bead along the undercut. In this situation would you?
  • Agree to go ahead with no preheat as the weld is so small.
  • Only allow the welder to cosmetically blend out the undercut providing the wall thickness remains within the specification tolerances.
  • Agree to go ahead with a preheat 50oC above original.
  • Cut out the joint and re-weld.
  1. Which of the following welding processes uses a resistive heating system to achieve weld metal deposition?
  • Manual metal arc welding
  • Submerged-arc welding
  • Electro slag welding
  • Resistance spot welding
  1. Which of the following actions can help to prevent the production of spatter during a welding process:
  • Switch to AC power
  • Use dry electrodes
  • Reduce arc current
  • All of the above
  1. Under normal contract conditions, weld procedure approval tests for pipe work are:
  • Mandatory
  • Depend upon site and weather conditions
  • Dependent upon the contractor’s confidence in his procedures
  • Only required when CO2 welding is to be used.
  1. Which standard is used for European welding procedure qualifications?
  • BS EN ISO 4872
  • BS EN ISO 15614
  • BS EN ISO 287
  1. Basic electrodes are often sold vacuum packed. The reason is:
  • They have been packed at the manufactures at a hydrogen level less than 5ml per 100g of weld metal deposited
  • They are mass produced which makes these electrodes cheap
  • They require less baking time after removal from the packet
  • They are formulated that once open they will pick up no more moisture
  1. How could arc blow be avoided?
  • Use AC
  • Use DC+
  • Use DC-
  • Increase travel speed
  1. Manual metal arc welding of low alloy steels is more likely to be performed with:
  • Rutile electrodes
  • Cellulosic Electrodes
  • Iron powder electrodes
  • Basic hydrogen controlled electrodes
  1. The usual method of assessing the sensitivity of radiograph is by means of a:
  • Dosimeter
  • Fluoroscope
  • IQI ( Penetrameter)
  • Clinometer
  1. Cast and Helix are terms that refer to:
  • Ingredients in the flux covering
  • Bead deposition techniques for distortion control
  • Quality of the welding wires
  • Sources from which wires are drawn
  1. Which of the following defects is unlikely to be found by visual inspection?
  • Linear misalignment
  • Undercut
  • Overlap
  • Linear slag inclusion
  1. Which of the following destructive tests is not normally required for welder approval test for mild steel?
  • Bend test
  • Macro examination
  • Impact tests
  • Fracture tests
  1. Which of the following can arise from copper inclusions is a ferrite steel weld?
  • Weld metal cracks
  • HAZ cracks
  • Lamellar tearing
  • Porosity
  1. Which of the following methods of NDT would be most likely to detect lack of side fusion in ferritic steel welds?
  • Penetrants
  • Magnetic particles
  • Radiography
  • Ultrasonic flaw detector
  1. A typical minimum OCV requirements for MMA (111) using basic electrode would be:
  • 70V
  • 40V
  • 100V
  • 20V
  1. When welding medium carbon steel plates over 90mm in thickness would the basic electrode require any pre-treatment before use?
  • None if they were in a vacuum pack
  • None if they were used in a factory
  • Heat to 5000C for 2 hours if used outside
  • Baked at 1500C for 4 hours prior to use
  1. Why would visual inspection of the excess weld metal at the bottom of a * cross country pipeline be important?
  • It is the most difficult area to weld.
  • It is the dirtiest part of the pipe as it is near the ground.
  • Welders always forget to weld the bottom.
  • It is the most difficult area to radiograph.
  1. When MMA welding what will be the effect on the weld if the electrode was changed from DC+ve to AC
  • None
  • It would have been easier for the welder to strike the arc
  • It would slightly increase the depth of penetration
  • It would give less penetration
  1. A butt weld has been made by MMA in a 50mm thick impact tested steel plate. The welding electrode use was a basic type, 5mm diameter. The measured welding parameters for one of the runs was 250 amps, 24 volts, using DC+ve polarity, and a ROL of 180mm per min. What would be the Arc energy?
  • Insufficient information given to calculate the arc energy
  • 1.9kJ/mm
  • 1.87kJ/mm
  • 2.0kJ/mm
  1. Which of the following electrode types would produces the lowest levels of hydrogen?
  • Cellulose coated electrodes sealed in a tin immediately after manyfature
  • Basic coated electrodes when baked correctly immediately prior to use
  • Rutile coated electrodes when dried at 1500C prior to use
  • Heavy rutile coated electrodes when dried at 1500C for 2 hours prior to use
  1. You observe centerline cracking a weld that as been made one of five work stations each making similar components. The first action to take is:
  • Impound all welding consumables
  • Report the occurrence to high authority
  • Stop all welding
  • Call for full NDT checks
  1. Which of the following defects is more common to weld deposited by the CO-2 welding process than weld deposited by manual metal arc?
  • Slag inclusion
  • Excess penetration
  • Lack of side fusion
  • Tungsten inclusions
  1. Which of the following is likely to give the highest impact strength in ferritic weld metal?
  • Cellulosic electrodes
  • Submerged arc with acid flux
  • Spray transfer Co-2-welding
  • Basic coated normal metal arc electrodes
  1. For which of the following is pre-heating most likely to be required?
  • Austenitic stainless steels
  • High strength alloy steels
  • Low and medium strength steels
  • Low carbon steels

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Why not an answer: Tungsten inclusions ?

Focus at type of base metal instead of welding imperfection.

Porosity is correct answer.


Question 28, why c?

CO2 process are MIG/MAG, a semiauto, so common imperfection of LOF imperfection.

Which of the following is a planar imperfection?

a Lack of sidewall fusion.
b Slag inclusion.
c Linear porosity.
d Root concavity.

When visually inspecting the face of a finished weld which of the following flaws would be considered the most serious:

a Excess weld metal height.
b Start porosity.
c Spatter.
d Arc strikes.

The European Standard for NDE of fusion welds by visual examination is:

a BS EN ISO 15614.
b BS EN ISO 2560.
c BS EN 287.
d BS EN ISO 17637.

A fillet weld has an actual throat thickness of 8mm and a leg length of 7mm, what is the excess weld metal?

a 2.1mm.
b 1.8mm.
c 3.1mm.
d 1.4mm.

Which of the following elements is added to steel to give resistance to creep at elevated service temperatures?

a Nickel.
b Manganese.
c Molybdenum.
d Aluminium.

Lack of sidewall fusion.


you guys can check “API 577” MIG/MAG Part of it.

Tungsten inclusion when slope out.slope down prevent weld crater,pool contimation

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3.2mm but why dont have 3.2 mm

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Which question you are answering?

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Arc Strike - Most serious defect

Molybdenum (Refer CSWIP 3.1 Book Page no.7.2)

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I agreed it, arc strike are most serious defect, made initiatial point, local hard spot

7mm leg length x 0.7 = 4.9mm design throat thickness
actual throat thickness 8mm - design throat thickness 4.9mm = 3.1mm

d BS EN ISO 17637