I went to the government website and pulled a inspectors call letter at random, this is a CFIA food inspector:https://emploisfp-psjobs.cfp-psc.gc.ca/psrs-srfp/applicant/page1800?toggleLanguage=en&noBackBtn=true&poster=201663&psrsMode=1
First off, you have to meet the conditions of employment as Jolly Jack has laid out.
What you are going to be questioned on is laid out in the Knowledge portion. in this example:
Knowledge of food processing methods and the hazards and controls related to the processing methods.
Knowledge of the inspection methods and procedures and/or relevant grade and standards.
Knowledge of HACCP principles, audit procedures and investigative techniques.
Knowledge of the Federal Acts and Regulations relevant to the position governing food, plant protection and animal health. For additional information, please consult http://www.inspection.gc.ca
You will be asked a question on every portion of the knowledge section and have to pass.
Plus, in the Abilities and Skills:
Thinking / Judgement
Planning / Organizing
Effective Interpersonal Relations
Adaptability and Flexibility
Communication (Oral and Written)
Simulation Exercise for Inspectors of the CFIA;
The Simulation Exercise for Inspectors (SEI) of the CFIA will be used for competency assessment and candidates must obtain the pass mark for each competency at the level EG-02, EG-03 and/or EG-04 to pass the test for consideration of positions they have applied for.
For this position you will undergo a test, probably put the person in a situation and see how it is dealt with.
You could also have some behaviour based questions.
I do know that TC have used them in the past. Because we are all certificated, TC presumes that the knowledge is there, so they ask questions to see how you deal with situations based on your past.
So you can look at the Abilities and just think about some situation that shows how you have shown this in the past.
If they do this, you will need to have someone as a reference for checking. I strongly suggest you Google, Behaviour Based Interviews and read up on them. It is suprisingly difficult for most people to answer, "Why are you the best person for this job?"
When you go in, don't be surprised if there is a stenographer in the room taking down everything. TC Inspectors may have to go to court and testify, so I think this is to see how you react to that.
Everything that you will be asked is in the SOMC, Statement of Merit Critia. So read it very carefully.
Anyway, hope this helps.