The Espresso Machine
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EM 4.13 Comprehension Test — Chapter 4 Quiz
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1. EM 4.1
In what year was a PID first installed in a
domestic
espresso machine?
1961
2008
2001
1990
2. EM4.2
In what year was the first PID-controlled multi-boiler released?
2001
1990
1961
2008
3. EM4.3
What is the definition of
offset temperature
?
The difference between the temperature of the water exiting the group head and the temperature of the
puck
The difference between the temperature of the brew boiler and the temperature of the espresso exiting the portafilter
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 in the boiler and the temperature of the water exiting the group head
4. EM4.4
Fill in the blank: To enable temperature profiling, it is useful to have a low _____ in the group head.
water level
thermal mass
temperature
profile
5. EM4.5
How does the Decent espresso machine manage flow?
By using an app that links to your smartphone
By having a group with a very high
thermal mass
By using PIDs in three separate parts of the machine
By counting the pulses of the machine’s vibration pump