CB Espresso Preparation and Brewing Techniques

Question 1

What is the ideal extraction time for a standard espresso shot?

Accepted Answer

25-30 seconds

Answer

A properly extracted espresso shot should take between 25 to 30 seconds to balance flavor, aroma, and body.

Question 2

Which grind size is best suited for brewing espresso?

Accepted Answer

Fine

Answer

A fine grind is ideal for espresso to create the necessary resistance for proper extraction under high pressure.

Question 3

Why is tamping important in espresso preparation?

Accepted Answer

To evenly distribute and compact the grounds

Answer

Tamping evenly distributes and compacts the coffee grounds to ensure consistent water flow and proper extraction.

Question 4

What is the purpose of pre-infusion in espresso brewing?

Accepted Answer

To saturate the coffee grounds before full pressure

Answer

Pre-infusion gently saturates the coffee grounds before full pressure is applied, allowing for more even extraction and better flavor balance.

Question 5

Which factor can cause an espresso shot to taste sour?

Accepted Answer

Under-extraction

Answer

An under-extracted shot, often due to a grind that is too coarse or an extraction time that is too short, can result in a sour taste.

(CB) Certified Barista Practice Test