EM 4.13 Comprehension Test — Chapter 4

1. EM 4.1

In what year was a PID first installed in a domestic espresso machine?

In what year was the first PID-controlled multi-boiler released?

The difference between the temperature of the water in the heat exchanger and the temperature of the water in the boiler
The difference between the temperature of the water exiting the group head and the temperature of the القُرص
The difference between the temperature of the water in the boiler and the temperature of the water exiting the group head
The difference between the temperature of the brew boiler and the temperature of the espresso exiting the portafilter

Fill in the blank: To enable temperature profiling, it is useful to have a low _____ in the group head.

How does the Decent espresso machine manage flow?