Mixed MCQ Flashcards
In the EU spirit regulations, whisk(e)y must have a maximum distillation strength of what:
- 94.8%
- 96%
- 40%
- 90%
94.8%
By definition rum cannot be made from which of the following:
- Sugar cane molasses
- Sugar beet
- Sugar cane juice
- Sugar cane syrup
Sugar beet
How long does cognac need to be kept in cask in a registered cellar before it can be called cognac?
- 1yr
- 2yr
- 3yr
- None of the above
2 years
What is the largest grown grain crop in the world today?
- Rye
- Wheat
- Maize
- Rice
Maize
The sorghum kernel does not have what?
- A husk
- An endosperm
- An embryo
- A pericarp
A husk
Breeders choose to cross varieties to improve which of the following characteristics?
- A better yield that gives more tonnage per hectare (t/ha)
- Better disease resistance
- Better extract potential
- All of the above
All of the above
Barley has a typical starch content of what?
- 57-88%
- 65-70%
- 71-80%
- 90-92%
57-88%
Steeping increases grain moisture from its storage levels of typically 12% to about:
- 43-46%
- 40-42%
- 30-32%
- 48-50%
43-46%
Which of the following will not be found in a typical steep?
- Compressed air and aeration tubes
- A turning mechanism
- A water inlet and outlet
- CO2 equipment
A turning mechanism
Ideal growing conditions for barley germination include which of the following?
- Removal of heat and CO2
- A supply of oxygen
- Turning the grain bed in order to get even malting and reduces the risk of rootlets matting together
- All of the above
All of the above
To preserve enzymes during kilning, the maltster will do what?
- Use low temperatures and high air flow at the start
- Use high temperatures and low air flow at the start
- Use high temperatures throughout
- Spray the drying malt with water
Use low temperatures and high air flow at the start.
What is the main sugar of sugar cane?
- Fructose
- Glucose
- Sucrose
- Dextrin
Sucrose
Where is the highest concentration of sugar in the sugar cane plant?
- The leaves
- The roots
- The base of the cane
- Near the top of the cane
The base of the cane
Blackstrap molasses is also known as what?
- Grade A
- Grade B
- Grade C
- Grade D
Grade C
There is little or no incentive for the sugar producer to ensure that the molasses is always the same, why?
A sugar refiner aims to make a profit from making and selling raw sugar.
Total Sugar As Invert (TSAI) is a way of reporting sugar content in molasses. Which of the following is not included:
- Sucrose
- Fructose
- Glucose
- Maltose
Maltose
Which grape variety makes up 95% of the grapes used for making Cognac?
- Pinot Noir
- Ugni Blanc
- Sauvignon Blanc
- Folle Blanche
Ugni Blanc
At the right time for harvesting, how much of a grape is sugar?
- 10%
- 15%
- 20%
- 78%
20%
Winemakers often add sulphur to the juice and fermented wine. Why?
- To combat unwanted spoilage organisms
- To speed up fermentation
- To enhance yeast growth
- To ensure sulphur aromas are high in the final product
To combat unwanted spoilage organisms.
Pomme fruit sugar and acid levels are different than those of grapes in what way?
- Sugar is high, acid is lower
- Sugar is lower, acid is higher
- Sugar and acid are lower
- Sugar and acid levels are the same
Sugar and acid are lower.
Sugar levels in mature agave plants typically reach around what?
- 12%
- 18%
- 24%
- 28%
24%
Borehole water has which of the following key attributes?
- Variable consistency of supply, constant temperature, low colour
- Variable consistency of supply, low microbiological count, low colour
- Good consistency of supply, constant temperature, low colour
- Good consistency of supply, low microbiological count, high colour.
Good consistency of supply, constant temperature, low colour
Which of the following ions is introduced via fertilisers into the water system?
- NO2-
- Ca2+
- NH4+
- NO3-
NO3- (Nitrate)
Pressed yeast is what percent dry matter?
- 18%
- 20%
- 25%
- 28%
25%
What kind of mill is best suited to producing a grist for a mash filter?
- 2 roller
- 4 roller
- 6 roller
- Hammer
Hammer
Which of the following does a simple mash tun not have?
- Perforated false bottom
- Rakes
- Sparge arm
- Steele’s masher
Rakes
What is the maximum Brix a yeast can ferment?
- 8%
- 17%
- 22%
- 25%
25%
If a distiller wants to emphasise the flavours and aromatics of the pure grape juice what should they do?
- Use wine where unpressed grapes are used prior to fermentation
- Use a mixture of wines from pressed and unpressed grapes prior to fermentation
- Use wine where pressed grapes are used prior to fermentation
- Use only grapes suitable for Champagne production
Use wine where pressed grapes are used prior to fermentation.
The waste agave material (bagazo) after milling is not discarded. What is it NOT used for?
- Fuel Fertiliser
- Furniture Stuffing
- Animal feed
Animal feed
Which of the following is true about distilling yeast?
- They are highly flocculant
- They flocculate at the bottom of the vessel
- They flocculate at the top of the vessel
- They are non-flocculant
They are non-flocculant.
Wooden washbacks (fermenters) have a number of properties. Which of the following is NOT correct?
- Retained for their flavour contribution
- Cheap to install and maintain since timber is not costly
- Chosen to retain a traditional distillery image
- Prone to leaks if the wood is allowed to dry out, so water filled when not in use
Cheap to install and maintain since timber is not costly.
Which of the following would be measured at the end of fermentation?
- Alcohol
- Carbon dioxide content
- OG
- Nitrogen
Alcohol
Which of the following is a key difference between Scottish and Irish whiskey fermentations?
- Saccharified by other exogenous diastases
- From a mash of malted barely with or without other cereals
- Saccharified by the diastase of malt
- Fermented by the action of yeast
Saccharified by other exogenous diastases.
What is secondary fermentation in whisk(e)y fermentations?
- The second phase of fermentation
- A second addition of yeast mid fermentation
- The breakdown of dextrins by malt enzymes during fermentation
- The bacterial conversion of malic to lactic acid at the end of fermentation
The breakdown of dextrins by malt enzymes during fermentation
Incremental feeding of rum fermentations with diluted molasses is used for which of the following reasons?
- To keep bacterial infection under control
- To maximise vessel utilisation
- To reduce scale precipitation
- To increase the alcoholic strength of the final fermented wash
To increase the alcoholic strength of the final fermented wash.
Bacterial cultures such as Clostridium Saccharobutyricum are inoculated into heavy rum fermentations to achieve which of the following?
- To swamp out other more troublesome bacteria
- To produce acids which will esterify
- To cause a malolactic fermentation
- To increase the alcohol yield
To produce acids which will esterify.
Why, in the Melle-Boinot process, is yeast dumped and fresh yeast introduced every 2-6 months?
- The yeast viability decreases
- Some bacteria become resistant to acid washing
- The yeast mutated and fermentations become atypical
- Some yeast is lost and needs replacing
Some bacteria become resistant to acid washing.
Which of the following microorganisms are used in the fermentation of heavy rums?
- Saccharomyces cerevisiae
- Schizosaccharomyces pombe
- Clostridium saccharobutyricum
- All of the above
All of above
Fermentations to produce wine for brandy is different to whisk(e)y fermentation in which of the following ways?
- The OG is lower at 5% w/w
- The pH is lower at less than 4
- The fermentation temperature is higher
- The are high levels of nitrogen
The pH is lower at less than 4.
Why is the mosto for a mixto tequila fermentation at a higher starting gravity than the mosto for a 100% agave tequila fermentation?
- Less water has been used in mashing
- A high proportion of non-fermentables are present
- Up to 49% corn syrup at high Brix can be added
- None of the above
Up to 49% corn syrup at high Brix can be added
A sanitiser is used to do what?
- Prevent infection
- Destroy all viable microbes and spores
- Reduce viable microbes to a safe level
Reduce viable microbes to a safe level.
Which of the following is a chemical sanitiser used in distilling?
- Steam
- Sodium Hypochlorite
- Nitric acid
- UV light
Sodium hypochlorite
Which detergent system is best suited to cleaning mashing plant with high levels of organic soils?
- Hot caustic detergent
- Nitric acid
- Cold caustic detergent
- Steam
Hot caustic detergent at 70-80C
The principal purpose of the first rinse (pre-rinse) is to what?
- To test the route to ensure return flow
- To check for leaks
- Remove excess dirt before the detergent circulation
- To wet the walls of the equipment and soften soil
Remove excess dirt before the detergent circulation.
Delaying the first cut from heads to heart will:
- Increase the waxy and oily components in the spirit
- Decrease the levels of volatile components in the foreshots
- Increase the level of ethyl acetate in the spirit
- Increase the ethanol strength in the low wine and feints receiver (LWFR)
Increase the ethanol strength in the low wine and feints receiver (LWFR)
How can hot water from a shell and tube condenser be used elsewhere in the distilling process?
- In the boiler house to make steam
- Heating fermenters to speed up fermentation
- To pre-heat wash entering the still prior to distillation
- To heat up the final spirit prior to filtration to remove haze
To pre-heat wash entering the still prior to distillation
Fusel oils can be separated from alcohol, (which can be returned to the distillation column), using a water decanter because:
- Fusel oil and water are attracted by hydrogen bonds
- Fusel oils are much less miscible in a low alcohol solution
- Fusel oils are always immiscible with water
- Fusel oils are heavier than water
Fusel oils are much less miscible in a low alcohol solution.
Product leaving the stripping column is at what ABV?
- 25-30%
- 7-10%
- 10-25%
- 40-50%
10-25%
A continuous still is heated by what?
Steam coils
A direct fire
A reboiler
Gas jets
A reboiler
Double retort distillation is commonly used in the Caribbean rum industry, which of the following is correct?
It makes efficient use of energy and water
The distillate is collected at below 85% abv
There are two heat inputs
It uses only two stills, wash still and high wines retort
It makes efficient use of energy and water.
How many columns does a barbet still have?
- 2
- 3
- 1
- 4
2