Multi choice question 

5 Sample Questions

The likelihood of a brittle fracture in steels will increase with:

  • A. The formation of a fine grain structure
  • B. A reduction in-service temperature to sub zero-conditions
  • C. A slow cooling rate
  • D. All if the above

Hydrogen cracking in HAZ is most likely to occur when welding:

  • A. Carbon manganese steels
  • B. Austenitic stainless steel
  • C. Micro alloyed steel (HSLA)
  • D. Low carbon steel

Which of the following are considerations for selection of a preheat temperature:

  • A. Carbon equivalent, joint design, welding process type and plate material quality
  • B. All joint over 25mm thick, hydrogen levels, welding process, carbon equivalent
  • C. Arc energy, material thickness, hydrogen scale and carbon equivalent
  • D. All of the above are considerations for the selection of a preheat temperature

Which of the following destructive test would indicate the toughness value of the weld metal/parent metal and HAZ?

  • A. Macro
  • B. Nick break
  • C. Tensile
  • D. Charpy Vee notch

What constituent is needed in the coating of an electrode to prevent the formation of porosity when welding rimming steel?

  • A. Iron powder
  • B. Potassium silicate
  • C. Silicon
  • D. Calcium carbonate

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