Coffee Machine Parts Mix & Match

Questions and Answers

What is the function of the group head in an espresso machine?

Heats the water

Used for espresso extraction (correct)

Dispenses hot water

Catches overflow

What does the portafilter do?

Holds the ground coffee under the group head (correct)

Dispenses hot water

Heats the water

Regulates steam flow

What is the purpose of the filter basket?

A basket with tiny holes that holds the ground coffee for extraction.

The steam wand provides dry steam under pressure for milk frothing and texturing.

True Signup and view all the answers

What is the function of the hot water outlet?

Dispenses hot water for preheating vessels and making other hot beverages. Signup and view all the answers

What does the pressure gauge indicate?

Shows steam pressure and pump pressure needed for brewing coffee. Signup and view all the answers

The ______ shows the amount of water inside the boiler.

water level indicator Signup and view all the answers

What do the shot buttons do?

Turn on the water flow to the group head Signup and view all the answers

The drip tray catches all overflow and lets it drain away.

True Signup and view all the answers

What is the purpose of the steam wand nozzle?

Inserted into the milk to aerate and produce desired texture for milk-based drinks. Signup and view all the answers

Match the following espresso machine components to their definitions:

Pump = Carries hot water to the group head for extraction Boiler = Heats the water for brewing teas and steaming milk Water Filter = Removes impurities from the water Dispersion Screen = Disperses water evenly onto coffee grounds Signup and view all the answers

What does the cup warmer do?

Keeps cups and glasses warm. Signup and view all the answers

Study Notes

Coffee Machine Components

Group Head: Essential for espresso extraction; hot water disperses onto ground coffee in the portafilter, extracting flavors.
Portafilter: Holds ground coffee during espresso preparation; includes a handle and filter basket for single or double shots.
Filter Basket: Contains tiny holes; designed to hold ground coffee for extraction; available in single or double shot sizes.
Steam Wand: Thin pipe for delivering dry steam under pressure; used for frothing and texturing milk.
Steam Wand Nozzle: Located at the tip of the steam wand; inserted into milk to aerate and achieve desired milk texture; can feature 2 or 4 small holes for steam distribution.
Hot Water Outlet: Dispenses hot water for preheating vessels and other hot beverages; essential for versatile machine functions.
Pressure Gauge: Manometer indicated dual pressures; measures steam and pump pressure critical for brewing; ideal brewing pressure is between 7-9 bars.
Water Level Indicator: Displays water levels in the boiler; automatic filling for plumbed machines, manual for portable options.
Shot Buttons: Activate water flow to group head; controls heat exchange process for brewing coffee; available in automatic and manual formats.
Drip Tray: Catches overflow from coffee and water; drains away through a waste pipe to maintain cleanliness.
Cup Warmer: Flat surface on the espresso machine; keeps cups and glasses warm before use.
Pump: Carries heated water to the group head; utilizes a heat exchanger to reach optimal extraction temperature of 90-96 °C.
Boiler: Heats water for brewing tea and steaming milk; a vital component for maintaining the machine's functionality.
Water Filter: Removes impurities from water; prevents taste issues and calcium buildup within machine components.
Dispersion Screen: Fine mesh at the group head bottom; ensures even water distribution onto coffee grounds for consistent extraction.
Head Seal: Seals the portafilter to the group head; critical for creating pressure that forces water through ground coffee during extraction.
Steam Wand Knob: Regulates steam flow; essential for texturing milk effectively in espresso drinks.

Description

Test your knowledge on the essential parts of a coffee machine with this mix and match diagram quiz. Understand the functions of each component like the group head and portafilter to improve your espresso-making skills.