Training notes\ Exercise

According to your profile you are a Trainee Piping Designer with 3 years experience. You have said you want to keep busy by doing some self study. Good!
So here is what I suggest you do. Go through every "Tab" ("Training" , "Tips" , etc) at the top of the screen on this web site. Print our everything you find there. Punch it and make yourself a book. Read through every article, high light points of interest. and underline items or issues where you have questions.
Post the questions here on the "Technical" forum. Others will get the benefit of your question and you will get not only my answer but answers from others to.

This should keep you busy for a while.

Good luck and I am looking forward to seeing your questions on the forum.
Advice:
"In piping there is a reason for everything"
M. J. Garofalo, Manager Piping Engineering & Design
Fluor Corp. So. Calif. Div., 1955-1980

trev,
Have you had time to read any of the documents?
And do you have any questions?

ehsankamdar,
I have never seen a good standard entry level technical questionnaire for piping Design.
It is most impossible to guess what technical questions an interviewer might ask you.
To much depends on the training and experience of the person doing the interview and what has just happened with that persons work just prior to the interview.
Example:
If the person is educated and experienced in Material Engineering then he (or she) will tend to ask questions about piping material issues.

If the person is educated and experienced in Stress Engineering then he (or she) will tend to ask questions about pipe stress issues.

If the person that morning just got chewed out by a Client or the Project Manager for some issue about a Control Valve station than they will focus on questions about that issue.