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Test your basic knowledge |
Food Processing
Start Test
Study First
Subjects
:
industries
,
engineering
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Velocity gradient that is formed- relative rate between the layers
shear rate
goal of mixing
ductility
over-run
2. Force that causes it to have friction with itself
Air classifiers (AKA aspiration cleaners
sugar content
shear
sorting
3. Fruit is dipped in a 1 to 2% hot sodium hydroxide solution (lye) and then pressure washed to remove skin. Alternatively - involves dipping in 10% sodium hydroxide and using rubber discs or rollers to remove the skin.
high viscosity liquids
second pressure drop
caustic peeler
kneading
4. Gum- fruit by the foot
ductility
roller
ductile foods
vibrating
5. Advantages: chill and store in one place limits handling - Disadvantages: Can dry/dehydrate produce
Problems with dry cleaning methods
cutting- miller- pulper
kneading
forced- air cooling
6. Flour milled using this
bulk density
baffle and angle
caustic peeler
roller
7. The amount of energy it takes to change the state
difference between rolls and biscuits
relative density
shear- thinning fluids
latent heat
8. Force per unit area
kneading
difference between rolls and biscuits
stress
shear- thinning fluids
9. Involves tumbling in a drum with a silicon carbide or carborundum surface
abrasion peeling
size reduction ratio
Problems with dry cleaning methods
hurdle technologies
10. Advantages: Suitable for leafy vegetables; does NOT require spraying - or immersion with water - hence won't spread disease. High energy efficiency - Disadvantages: Some product shrinkage due to water loss.
reynolds number
panning
vacuum cooling
pulping
11. Ratios above 100:1
kneading
baffle and angle
fine grine
rotational
12. 3 components of mixing liquids
longitudinal - radial - rotational
high viscosity liquids
bulk density
egg yolk
13. Placed at goods intake - Before and after a unit operation - At the end of a line
Magnetic separators and metal detection
hydrometer
colloids
wet cleaning equipment
14. Each thing we do to prevent degradation is one hurdle- name an example- packaging
grading
hurdle technologies
roblems with wet cleaning
vacuum cooling
15. Dispersed phase in mayo
Comminution
oil/vinegar
rollers
sugar content
16. 3 things used for size reduction
roller
shear - impact - compression
hammer mill
over-run
17. Creates lots of heat - main force are shear action
latent heat
bowl chopper
attrition mills
reynolds number
18. Shearing breaks up fat globules in milk- but they still want to clump- pass through ------ disperses them
second pressure drop
Miscibility
hydrometer
high viscosity liquids
19. Used to chop meat and harder fruits and veggies into pulp
roller
bowl chopper
sorting
goal of mixing
20. Tumbling action inside a rotating vessel - Screw type - Double Reversing agitators
shear - impact - compression
mixers for dry powder or particulate solids
Air classifiers (AKA aspiration cleaners
Miscibility
21. Concentrated fruit juices - liquid chocolate - and corn flour suspension
high viscosity liquids
non- newtonian fluids
roblems with wet cleaning
goal of mixing
22. Soaking tanks (with or w/o stirring/paddles) - Flotation washing (fluming) - Spray washers (belts - drums) - Brush washers - Ultrasonic cleaners
wet cleaning equipment
sorting
bulk density
roblems with wet cleaning
23. Used to mill wheat- cereals and flours
bulk density
rollers
high viscosity liquids
Latent heat of fusion
24. Hammers hit food but force it up to the top chamber - impact to the top of the machine- can change the screen size- can't leave impact zone until it is small enough to go through the screen
peeling
hammer mill
forced- air cooling
size reduction ratio
25. Creates the smallest particle size
pulping
nip
Electrostatic separators
crumbly
26. Dividing based on several characteristics capable of automatically
shear rate
shear stress
grading
latent heat of vaporization
27. Measures specific gravity
hydrometer
Pin and disc mill
Comminution
rotational
28. Multiple paddle agitators - Planetary/Orbital - Z-Blade - Rotor-Stator
Miscibility
mixers for high viscosity liquids
attrition mills
crumbly
29. Efficient mixing is achieved by creating and recombining fresh surfaces
mixers for high viscosity liquids
kneading
grading
sorting
30. Generally mixed with slow-speed - vertical-shaft impellers such as a anchor and gate agitator
high viscosity liquids
heat
laminar
batch - convayer - immersion - truck
31. Shear and impact forces - used for spice manufacturing - 70:30 impact predominated
cutting- miller- pulper
vacuum cooling
pulping
Pin and disc mill
32. = initial avg particle size/final avg particle size
rotational
sol
Specific gravity
size reduction ratio
33. Ratio below 8:1
heat
course grind
shear rate
wet cleaning equipment
34. Helps prevent blinding
shear stress
rotational
vibrating
shear - impact - compression
35. Limited number of applications where contaminants have a different surface charge from the raw material
Electrostatic separators
Magnetic separators and metal detection
course grind
emulsifying/homogenizing
36. Requires size reduction of dispersed particles by the application of intense shearing forces
sol
rollers
homogenization
Specific gravity
37. Emulsifier in mayo
shear
roller
egg yolk
grading
38. Not always effective (attached soil) - Can be dusty (explosion hazard) - Recontamination hazard - Can damage product
over-run
Problems with dry cleaning methods
Magnetic separators and metal detection
forced- air cooling
39. What factors affect the degree of mixing that can be achieved with dry powders or particulate solids?
screens
over-run
panning
relative density
40. Pressure- pushing but not dynamically loaded
Pin and disc mill
forming
course grind
compressive force
41. Generally used for products with high mechanical strength and low moisture - Relies on density and area difference
mass balance
Air classifiers (AKA aspiration cleaners
shear
impact
42. High-speed mixers - Hydroshear homogenizer - Membrane emulsifiers - Pressure homogenizers - Rotor-stator homogenizers - Ultrasonic- sound energy to break particles
emulsifying/homogenizing
ductile foods
Comminution
rotational
43. Under motion pushing
Electrostatic separators
impact
peeling
Magnetic separators and metal detection
44. Amount of energy it takes to change the temperature
sorting
Specific heat
grading
shear stress
45. Separate products by size
crumbly
shear
screens
Pin and disc mill
46. Ingredients in mayo
oil/vinegar
vacuum cooling
egg - vinegar - oil
difference between rolls and biscuits
47. Used to be was dividing things on one characteristic
newtonian fluid
difference between rolls and biscuits
bulk density
sorting
48. Linear
goal of mixing
attrition mills
laminar
ductile foods
49. May be single (one stationary casing and a frooved one that rotates) or double- where the two surfaces rotate in opposite directions - Dress of millstone will determine texture of the final product
non- newtonian fluids
disc mill
forced- air cooling
roblems with wet cleaning
50. Dimensionless group that describes flow characteristics - includes pipe diameter - average velocity of fluid flow - fluid density - and fluid viscosity.
shear rate
heat
reynolds number
sugar content