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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. Distance between rollers
difference between rolls and biscuits
ductility
rotational
nip
2. Paddle - Multiple Impeller - Turbine - Propeller
stress
strain
Mixers for Low-or Medium Viscosity Liquids
rollers
3. Force that causes it to have friction with itself
grading
latent heat
reynolds number
shear
4. The ability to form a homogenous mixture
hurdle technologies
oil/vinegar
course grind
Miscibility
5. 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
caustic peeler
disc mill
ductile foods
rotational
6. Generally used for products with high mechanical strength and low moisture - Relies on density and area difference
shear stress
roblems with wet cleaning
Air classifiers (AKA aspiration cleaners
egg - vinegar - oil
7. Velocity gradient that is formed- relative rate between the layers
sol
shear rate
Mixers for Low-or Medium Viscosity Liquids
Pin and disc mill
8. Most energy used for size reduction goes to
Pin and disc mill
oil/vinegar
heat
colloids
9. Creates the smallest particle size
size reduction ratio
pulping
strain
impact
10. Available moisture (relative vapor pressure)
pulping
water activity
fine grine
baffle and angle
11. Efficient (minimize losses) - Low Cost - No product degradation
peeling
sugar content
shear - impact - compression
latent heat
12. Mass
compressive force
hydrometer
Magnetic separators and metal detection
bulk density
13. Size reduction equipment in order of decreasing size
Electrostatic separators
size reduction ratio
forced- air cooling
cutting- miller- pulper
14. Shear and impact forces - used for spice manufacturing - 70:30 impact predominated
Miscibility
colloids
size reduction ratio
Pin and disc mill
15. Advantages: Rapid cooling; can handle large quantities; prevents dehydration - Disadvantages: Can encourage diseases; not all products tolerate wetting; restrictions on packaging and stacking arrangements; capital costs can be high
rotational
hydrocooling
roblems with wet cleaning
attrition mills
16. Placed at goods intake - Before and after a unit operation - At the end of a line
water activity
vacuum cooling
shear- thinning fluids
Magnetic separators and metal detection
17. What factors affect the degree of mixing that can be achieved with dry powders or particulate solids?
colloids
oil/vinegar
ductility
relative density
18. 3 things used for size reduction
bulk density
colloids
shear - impact - compression
Pin and disc mill
19. Soaking tanks (with or w/o stirring/paddles) - Flotation washing (fluming) - Spray washers (belts - drums) - Brush washers - Ultrasonic cleaners
colloids
course grind
wet cleaning equipment
screens
20. Energy from liquid to gas and vice versa
latent heat of vaporization
Miscibility
bowl chopper
shear
21. = (vol of foam - vol liquid)/vol liquid) x 100
over-run
goal of mixing
non- newtonian fluids
Magnetic separators and metal detection
22. Formed when one substance of very small particle size is dispersed through another substance and the two substances are immiscible
Latent heat of fusion
colloids
kneading
nip
23. = initial avg particle size/final avg particle size
ductility
size reduction ratio
latent heat of vaporization
peeling
24. Linear relationship between sheer rate and sheer stress
turbulent
newtonian fluid
hydrocooling
mixers for high viscosity liquids
25. Helps prevent blinding
rotational
bowl chopper
Air classifiers (AKA aspiration cleaners
vibrating
26. 4 types of hydrocoolers
batch - convayer - immersion - truck
Miscibility
relative density
longitudinal - radial - rotational
27. Ratio below 8:1
Specific heat
heat
course grind
egg - vinegar - oil
28. Multiple paddle agitators - Planetary/Orbital - Z-Blade - Rotor-Stator
reynolds number
bulk density
screens
mixers for high viscosity liquids
29. Flour milled using this
vacuum cooling
relative density
roller
Mixers for Low-or Medium Viscosity Liquids
30. Ability to deform permanently without breaking
newtonian fluid
ductility
shear rate
water activity
31. Tumbling action inside a rotating vessel - Screw type - Double Reversing agitators
second pressure drop
hydrocooling
mixers for dry powder or particulate solids
fine grine
32. 3 components of mixing liquids
oil/vinegar
abrasion peeling
longitudinal - radial - rotational
rollers
33. Used to mill wheat- cereals and flours
shear
rollers
hammer mill
attrition mills
34. A fluid suspension of a colloidal solid in a liquid
sol
shear - impact - compression
sugar content
newtonian fluid
35. High-speed mixers - Hydroshear homogenizer - Membrane emulsifiers - Pressure homogenizers - Rotor-stator homogenizers - Ultrasonic- sound energy to break particles
emulsifying/homogenizing
size reduction ratio
relative density
Magnetic separators and metal detection
36. Linear
forming
homogenization
laminar
grading
37. Emulsifier in mayo
disc mill
latent heat of vaporization
Pin and disc mill
egg yolk
38. Not always effective (attached soil) - Can be dusty (explosion hazard) - Recontamination hazard - Can damage product
Problems with dry cleaning methods
sorting
Magnetic separators and metal detection
vibrating
39. 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.
rollers
vacuum cooling
grading
compressive force
40. Amount of energy it takes to change the temperature
latent heat of vaporization
crumbly
Specific heat
kneading
41. Rotating vessel slowly deposits material on top
ductile foods
panning
fine grine
sol
42. = mass of liquid
cutting- miller- pulper
size reduction ratio
Specific gravity
goal of mixing
43. Pressure- pushing but not dynamically loaded
mixers for dry powder or particulate solids
Mixers for Low-or Medium Viscosity Liquids
compressive force
crumbly
44. Used to be was dividing things on one characteristic
Pin and disc mill
sorting
latent heat
panning
45. Creates lots of heat - main force are shear action
hammer mill
difference between rolls and biscuits
attrition mills
relative density
46. Force per unit area
stress
caustic peeler
turbulent
nip
47. Force between the layers in the fluid
Comminution
heat
shear stress
Specific gravity
48. Used to chop meat and harder fruits and veggies into pulp
bowl chopper
Mixers for Low-or Medium Viscosity Liquids
over-run
Comminution
49. Ingredients in mayo
rollers
high viscosity liquids
disc mill
egg - vinegar - oil
50. Gum- fruit by the foot
homogenization
ductile foods
First stage to create small particle size- second to disperse clumping
reynolds number