If you google common interview questions then you'll probably find the kind of questions they typically ask in the initial interview.
Assembly Line Worker Interview Questions
556 assembly line worker interview questions shared by candidates
Do you know what the company does?
Can you lift 25 kilograms?
do you have any issues working with meat products (beef, chicken, etc)?
Describe a difficult Scenerio at work and how you managed it.
Do you want to work here
Previous experience related to this position
Where do you see yourself in 5 years? Tell me about yourself.
Why would you like to work for us?
What was one time you prevented a danger from happening in the workplace?
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