Manufacturing the . Y-Block is will probably be the first machining exercise you will complete in the labs. The PLAs and or Lab staff will setup the machine tools for you and will be and will be with you while you complete the exercise.
The purpose of the exercise is to show you around the labs and do introduce you to the skills needed to operate a CNC milling machines. You will begin to learn the skills needed to safely operate the mills and to prepare stock materials for further processing.
The part you are making is part of the final assembly of your thermo-acoustic engine.