3rd section for final

Question 1

Repeatability (r95) is internal lab method check.

Answer 1

True

Question 2

Which of the following represent the measures of data dispersion?

Answer 2

Standard Deviation
Variance
Standard Error

Question 3

The absolute minimum value of Cp for a capable process is:

Answer 3

1

Question 4

Quality Assurance (QA) puts the emphasis on

Answer 4

Quality Assurance (QA) puts the emphasis on the prevention rather than detection.

Question 5

Actual Colloidal Stability tests measure beer haze

Answer 5

At the end of its shelf life

Question 6

Protein-polyphenol haze formation is influenced by:

Answer 6

Dissolved oxygen
Ethanol

Question 7

Predictive shelf life tests measure beer haze at the end of its shelf life

Answer 7

False

Question 8

Choose a statement that is not true. Sources of non-biological haze in beer include:

Answer 8

papain

Question 9

When a gas phase storage cylinder is discharged, the pressure:

Answer 9

Reduces progressively during discharge

Question 10

Absolute pressure is the total pressure (on the beer), and is the sum of atmospheric
pressure plus any additional applied pressure from dispense gas

Answer 10

True

Question 11

The carbonation level in a beer will decrease as the alcohol content increases.

Answer 11

True

Question 12

At sea level atmospheric pressure is equal to:

Answer 12

14.7 psi

Question 13

Gas blenders can provide:

Answer 13

3 blends

Question 14

Nitrogen is about 120 times less soluble in water than in beer.

Answer 14

False - the same

Question 15

The carbonation level in a beer will increase as the SG increases.

Answer 15

False

Question 16

Chill haze forms at 0°C and re-dissolves at 20°C

Answer 16

True

Question 17

Choose a statement that is NOT true. Oxygen radicals react with wort and beer components to produce oxidized
compounds. Some examples include:

Answer 17

Oxidation of SMM and DMS

Question 18

Quality Control (QC) is a form of inspection involving sampling of part in a mathematical manner to determine
whether or not the entire batch is acceptable.

Answer 18

True

Question 19

Reproducibility (R95) is internal lab method check.

Answer 19

FALSE = repeatability is

Question 20

Which of the following represent different approaches to quality?

Answer 20

TQM
Best Practice
SPC

Question 21

Non-biological haze in beer is mostly the result of

Answer 21

protein and polyphenols

Question 22

Non-biological haze in beer is mostly the result of

Answer 22

Mode
Mean
Median

Question 23

Quality Control (QC) is a form of inspection involving sampling of part in a mathematical manner to determine
whether or not the entire batch is acceptable.

Answer 23

True

Question 24

Increasing the temperature of the liquid will result in an increase of terminal settling velocity of the solid particle
which is settling under gravity.

Answer 24

True

Question 25

Which of the following is a reason why a lot of micro organisms can’t survive and grow in beer?

Answer 25

Low pH

Question 26

Which of the following removal ratings is best for comparison purposes between different filters?

Answer 26

Beta Rating

Question 27

Mach the number of PU ranges with the beer style

Answer 27

Wheat beers :5-8 Ales : 20-25 Full Lagers : 15-20

Question 28

The main objective of pasteurization is achieving colloidal stability of beer

Answer 28

False

Question 29

the beta rating test measures the total particle count change across the filter. If there are 1 000 000 of particles in the filter infeed stream, and 75 000 particles in the filter outfeed stream, the β-rating of the filter is

Answer 29

!3.33 and the precent removal is 92.5

Question 30

Choose true statements lenticular filter

Answer 30

Is using a regenerative filter aid has a enclosed modular design

Question 31

Particles being filtered are larger than the pore openings between filter fibers

Answer 31

Direct interception

Question 32

Particles being filtered impact with the fibers in filter where they are retained affected by membrane thickness

Answer 32

Inertial impaction

Question 33

Utilizes the random Brownian motion movement of particles

Answer 33

Diffusional Interception

Question 34

Particles being filtered are attracted by the fibers in filter media with high zeta potential

Answer 34

Charge effects

Question 35

ω r ρ ρ d v ρl η

Answer 35

The correct answer is: ω Ⱦ angular velocity, r Ⱦ radius of the axis of particle rotation, ρ Ⱦ particle density, d Ⱦ particle diameter, v Ⱦ terminal separation velocity, ρ Ⱦ liquid density, η Ⱦ liquid viscosity

Question 36

Separation of a particle under centrifugal force can be accelerated by:

Answer 36

Increasing the liquid temperature increasing the angular velocity of a particle

Question 37

Removal efficiency of sterile filter is defined as the titre reduction. Tr = (No of organisms at inlet/No of organisms at outlet). If the number of bacteria at inlet is 1 trillion, and the number of bacteria at outlet is 1000, Tr =

Answer 37

10^9

Question 38

Primary cause of colloidal instability is beer is the presence of mineral salts in brewing water.

Answer 38

False

Question 39

Which of the following variables should be taken into consideration when deciding upon the level of required PU a beer should receive?

Answer 39

beer style beer tubidity

Question 40

Which of the following factors are contributing to the pressure drop in draft beer lines?

Answer 40

increase internal tube roughness Increased beer tube lenght

Question 41

Main reasons for a longer process time (up to 1 hour) in a tunnel pasteurizer are:

Answer 41

Reducing thermal stress on glass bottles Slowing internal container pressure rise

Question 42

For a properly adjusted draft system it should take approximately --- to fill a 1.89L growler

Answer 42

30 sec

Question 43

Match the container failure pressure with the small package type.

Answer 43

12 bar - returnable 10 bar - non returnable 6 bars - cans

Question 44

Which of the following are true statements about nitrogen?

Answer 44

Nitrogen is chemically inert gas, Nitrogen is less soluble in beer than carbon dioxide, Nitrogen is less dense than carbon dioxide

Question 45

'Lag' time for heat conduction through a container wall and then through the bottle contents in a tunnel pasteurizer is about

Answer 45

10 minutes

Question 46

If the beer travels to a faucet below keg level, the elevation difference used to determine static resistance is measured from the

Answer 46

the bottom of the keg

Question 47

Nitrogen is more expensive in terms of cost per unit volume than CO .

Answer 47

False

Question 48

It is good practice to use the smallest internal diameter line possible from the keg to the tap.

Answer 48

true

Question 49

One of the negative consequences of pasteurization process on the flavour of the final product is alcohol conversion to

Answer 49

aldehydes

Question 50

Flash pasteurizer has four sections:

Answer 50

Flash pasteurizer has four sections: Regenerative, Heating, Holding, and Cooling

Question 51

Three main failure modes that could occur with flash pasteurizer

Answer 51

Three main failure modes that could occur: Temperature drop, Plate failure, Gas breakout

Question 52

The carbonation level will depend on

Answer 52

The carbonation level will depend on the absolute pressure of the dispense gas

Question 53

Other sources of non-biological haze include:

Answer 53

Other sources of non-biological haze include: Starch, Non-Starch Polysaccharides, Ca-Oxalate

Question 54

Forcing Tests are based on forcing

Answer 54

Forcing Tests are based on forcing colloidally sensitive materials out of solution