CWB Welding Inspector Level III Study Guide 2024/2025 Exam Questions Marking Scheme New Update | A+ Rated

CWB Welding Inspector Level III Study
Guide 2024/2025 Exam Questions
Marking Scheme New Update | A+ Rated



Which of the following metals has the highest thermal conductivity?

(a) carbon steel

(b) stainless steel


(c) aluminum - 🧠ANSWER ✔✔(c)


The Ellingham diagram

(a) is a plot of thermal conductivity against temperature,

(b) shows the free energy of oxide formation against temperature.

(c) shows the rate of oxidation of metals against temperature. - 🧠ANSWER

✔✔(b)


True or False?




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, A metal with a high negative free energy of oxide formation will generally

require greater shielding from the atmosphere during welding. - 🧠ANSWER

✔✔True


Electricity can be conducted by:

(a) atoms and electrons.

(b) electrons and ions.


(c) only ions. - 🧠ANSWER ✔✔(b)


Which of the following elements is often present in submerged arc fluxes to

improve arc stability?

(a) copper

(b) potassium

(c) nickel


(d) tungsten - 🧠ANSWER ✔✔(b)


Thoria is added to tunsten electrodes for what purpose? - 🧠ANSWER

✔✔To increase thermionic emission by lowering the work function.


True or False?




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STATEMENT. ALL RIGHTS RESERVED