CSWIP Multiple Choice Questions - Practice Paper 3

30 Questions | By Danarsc | Updated: Mar 21, 2022 | Attempts: 13807

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1.

Which type of submerged arc welding flux is susceptible to moisture pick-up?
- A.
  
  Neutral
- B.
  
  Agglomerated
- C.
  
  Fused
- D.
  
  Are all about the same
2.

A Large grain size in the HAZ of a C-Mn Steel weld joint may have:
- A.
  
  Low ductility
- B.
  
  Low toughness
- C.
  
  High toughness
- D.
  
  High tensile strength
3.

A STRA test is used to measure the:
- A.
  
  Tensile strength of the welded joint
- B.
  
  Level of residual stress in butt joints
- C.
  
  Fracture toughness of the HAZ
- D.
  
  Through-thickness ductility of a steel plate (the Z direction)
4.

The risk of hydrogen cracking is greater when MMA welding:
- A.
  
  C-Mn Steels
- B.
  
  Austenitic Stainless Steels
- C.
  
  Low Alloy Steels For Elevated Temperature Service
- D.
  
  Low Carbon Steels For Cryogenical Service
5.

The property of a material which has the greatest influence on welding distortion is its
- A.
  
  Yield strength
- B.
  
  Coefficient of thermal expansion
- C.
  
  Elastic modulus
- D.
  
  Coefficient of thermal conductivity
6.

Which of the following is a suitable shielding gas for FCAW of stainless steels?
- A.
  
  100% Argon
- B.
  
  70% Argon + 30% He
- C.
  
  Argon + 5% Hydrogen
- D.
  
  Argon + 20% CO2
7.

The presence of iron sulphides in a weld bead may cause:
- A.
  
  Solidification cracking
- B.
  
  Hydrogen cracking
- C.
  
  Lamellar tearing
- D.
  
  Weld decay
8.

A macrosection is particularly good for showing:
- A.
  
  The weld metal HAZ microstructure
- B.
  
  Overlap
- C.
  
  Joint hardness
- D.
  
  Spatter
9.

Which of the following procedures would be expected to produce the least distortion in a 15mm straight butt weld?
- A.
  
  TIG weld, single-sided, multi-pass
- B.
  
  MMA weld, single-sided, multi-pass
- C.
  
  MMA weld, double-sided, multi-pass
- D.
  
  SAW weld, 1 pass per side
10.

A suitable gas/gas mixture, for GMAW for aluminium is:
- A.
  
  100% CO2
- B.
  
  100% Argon
- C.
  
  80% Argon + 20% CO2
- D.
  
  98% Argon + 2% 02
11.

Which of the following is associated with SAW more often than it is with MMA welds?
- A.
  
  Hydrogen cracking in the HAZ
- B.
  
  Solidification cracking in the weld metal
- C.
  
  Reheat cracking during PWHT
- D.
  
  Lamellar tearing
12.

EN ISO 5817 (Level C) specifies that the limit for the diameter (D) of a single pore in a weld is: D<0.3s, but max. 4mm where s=material thickness. For which of the following situations is the pore acceptable?
- A.
  
  S=20mm, measured pore diameter = 5mm
- B.
  
  S=15mm, measured pore diameter = 4.5mm
- C.
  
  S=10mm, measured pore diameter = 3mm
- D.
  
  S=10mm, measured pore diameter = 3.5mm
13.

To measure arc voltage accurately it is recommended that the voltmeter should be connected:
- A.
  
  Across the arc and as near as practical to the arc
- B.
  
  Across the power source terminals prior to arc initiation
- C.
  
  Across the power source terminals during the welding operation
- D.
  
  Anywhere in the circuit
14.

Lamellar tearing has occurred in a steel fabrication. What technique could have been used to find it before the weld was made?
- A.
  
  X-ray examination
- B.
  
  Liquid penetrant examination
- C.
  
  Ultrasonic examination
- D.
  
  It could not have been found by any inspection method
15.

Preheating a low alloy steel prior to welding to minimise the risk of:
- A.
  
  Porosity
- B.
  
  Excessive distortion
- C.
  
  HAZ cracking
- D.
  
  Lack of fusion
16.

Typical temperature used for normalising a C-Mn steel plate are:
- A.
  
  600-650ºC
- B.
  
  1000-1100ºC
- C.
  
  700-800ºC
- D.
  
  880-920ºC
17.

For GMAW the burn-off rate of the wire is directly related to:
- A.
  
  Stick-out length
- B.
  
  Wire feed speed
- C.
  
  Arc voltage
- D.
  
  Travel speed
18.

For MMA welding of a 60mm wall nozzle to a 100mm wall vessel shell, preheat temperatures should be checked:
- A.
  
  Before welding starts/restarts
- B.
  
  On the shell and nozzle
- C.
  
  At points at least 75mm from the joint edge
- D.
  
  All of the above
19.

A crack running along the centreline of a weld bead could be caused by:
- A.
  
  Use of damp flux
- B.
  
  Lack of preheat
- C.
  
  Arc voltage too high
- D.
  
  Weld bead too deep and very narrow
20.

To improve resistance to service failure caused by cyclic loading, it is good practice to:
- A.
  
  Use low heat input welding
- B.
  
  Use steel with a low CEV
- C.
  
  Ensure there are no features that give high stress concentration
- D.
  
  PWHT the fabrication
21.

The use of low carbon austenitic stainless steels and stabiliser stainless steels will minimise the risk of:
- A.
  
  HAZ cracking
- B.
  
  Weld decay
- C.
  
  Weld metal cracking
- D.
  
  Distortion
22.

Which type of SAW flux is susceptible to breaking down into fine particles during circulation?
- A.
  
  Fused
- B.
  
  Neutral
- C.
  
  Alloyed
- D.
  
  Agglomerated
23.

The maximum hardness in the HAZ of a steel will increase if the:
- A.
  
  Heat input is increased
- B.
  
  CEV is increased
- C.
  
  Joint thickness is decreased
- D.
  
  Basic electrodes are used
24.

BS EN ISO 5817 (Level B) specifies the limit for excess weld metal (h) on a butt weld as: h<1mm+0.1b, but max. 5mm, b= weld width. In which of the following situations is the measured excess weld metal acceptable?
- A.
  
  B = 10 measured excess weld metal = 2.5mm
- B.
  
  B = 20 measured excess weld metal = 3.5mm
- C.
  
  B = 35 measured excess weld metal = 4.5mm
- D.
  
  B = 45 measured excess weld metal = 5.5mm
25.

A C-Mn steel is being welded by MMA and the electrode run-out lengths that have been used are much shorter than specified by the WPS. This deviation may give:
- A.
  
  Increased risk of hydrogen cracking
- B.
  
  Increased risk of solidification cracking
- C.
  
  Lower values of HAZ toughness
- D.
  
  Higher values of HAZ hardness