|| Plumber Interview Questions and Answers in English || The Question: Have you done any certification in plumbing? In this video, the interviewer asks the candidate Is there anything else that you are looking to learn.The correct answer to the question follows as the candidate says i have craft certificate in plumbing and pipe fitting. Apart from this, we’ve listed the top Plumber interview questions that are most commonly asked in a Plumber interview. Knowing these questions and their answers