Percentage Evaporation Based on Wort Gravity

Question 1

What is the equation for calculating percentage evaporation?

Answer 1

Percentage evaporation = (boil gravity - start of boil gravity) / boil gravity × 100

Question 2

If the start of boil wort gravity is 10.2°P and the end of boil gravity is 10.8°P, what is the percentage evaporation?

Answer 2

5.6%

Question 3

Why is it important to monitor the evaporation rate during boiling?

Answer 3

To achieve the target evaporation in the required time

Question 4

How is the evaporation rate calculated using volume?

Answer 4

Evaporation rate = ((start volume - end volume) / start volume × 100) / time

Question 5

In the example, if the start volume is 400 hL and the end volume is 375 hL over 60 minutes, what is the evaporation rate?

Answer 5

0.092% per minute

Question 6

What instrument is used to measure wort gravity?

Answer 6

Hydrometer

Question 7

How does a hydrometer determine the gravity of the liquid?

Answer 7

It floats at a different height depending on the liquid’s gravity, and the gravity is read from a scale on the stem.

Question 8

What is the modern method for measuring wort gravity?

Answer 8

U tube densitometer

Question 9

How does a U tube densitometer work?

Answer 9

It measures the frequency of oscillation of a U-shaped tube filled with wort.

Question 10

True or False: A heavier U tube oscillates at a higher frequency.

Answer 10

False

Question 11

What additional method can estimate wort gravity?

Answer 11

Inline mass flow meters