Arrive on time. It's important that you are on-time for an interview. By doing so, you're showing that you are mindful and respectful of the interviewer's time. Arriving late can negatively impact your chances of landing the job, as it shows a sense of apathy and indifference.
There are two types of lever machines; manual piston and spring piston design. With the manual piston, the operator directly pushes the water through the grounds. In the spring piston design, the operator works to tension a spring, which then delivers the pressure for the espresso (usually 8 to 10 bar; 116 to 145 psi). Steam-driven A steam coffee machine
How to Make an Espresso (Espresso Machine Coffee) Espresso is a single shot of coffee from an espresso machine. Making good espresso is an art form, and needs much research and practice to develop the best results. This is only a very basic starting place. Ground espresso beans (1/4 oz. per shot)