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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. To achieve a uniform distribution of the components of flow
rotational
goal of mixing
latent heat of vaporization
fine grine
2. Specific gravity used as an indirect meaure of the
sugar content
egg yolk
panning
mixers for dry powder or particulate solids
3. Available moisture (relative vapor pressure)
water activity
compressive force
sol
cutting- miller- pulper
4. Mass
compressive force
pulping
Air classifiers (AKA aspiration cleaners
bulk density
5. Energy from liquid to gas and vice versa
mass balance
grading
rotational
latent heat of vaporization
6. What can be done to minimize the rotational component in liquid mixing?
wet cleaning equipment
baffle and angle
longitudinal - radial - rotational
Problems with dry cleaning methods
7. 3 things used for size reduction
Miscibility
Air classifiers (AKA aspiration cleaners
shear - impact - compression
turbulent
8. Increases the variety and convenience of foods - Common for bakery goods and confectionery - Many products are formed by extrusion - but we will discuss that later
stress
oil/vinegar
turbulent
forming
9. = (vol of foam - vol liquid)/vol liquid) x 100
over-run
longitudinal - radial - rotational
hammer mill
difference between rolls and biscuits
10. Separate products by size
kneading
water activity
Comminution
screens
11. Shear and impact forces - used for spice manufacturing - 70:30 impact predominated
Pin and disc mill
newtonian fluid
difference between rolls and biscuits
shear stress
12. Efficient (minimize losses) - Low Cost - No product degradation
rollers
hurdle technologies
peeling
sorting
13. Dispersed phase in mayo
forming
Latent heat of fusion
oil/vinegar
rotational
14. Involves tumbling in a drum with a silicon carbide or carborundum surface
latent heat
Mixers for Low-or Medium Viscosity Liquids
mixers for dry powder or particulate solids
abrasion peeling
15. Paddle - Multiple Impeller - Turbine - Propeller
roller
pulping
mixers for dry powder or particulate solids
Mixers for Low-or Medium Viscosity Liquids
16. Rotating vessel slowly deposits material on top
panning
bulk density
colloids
strain
17. Used to be was dividing things on one characteristic
sorting
fine grine
second pressure drop
wet cleaning equipment
18. Concentrated fruit juices - liquid chocolate - and corn flour suspension
non- newtonian fluids
disc mill
batch - convayer - immersion - truck
attrition mills
19. Linear
screens
laminar
Problems with dry cleaning methods
vacuum cooling
20. Generally mixed with slow-speed - vertical-shaft impellers such as a anchor and gate agitator
sorting
relative density
non- newtonian fluids
high viscosity liquids
21. Track what goes into a system- account for everything that comes out minus what stays in the system
mass balance
sorting
hammer mill
Problems with dry cleaning methods
22. 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
roblems with wet cleaning
hammer mill
wet cleaning equipment
Latent heat of fusion
23. Ratios above 100:1
shear
fine grine
homogenization
egg yolk
24. 3 components of mixing liquids
longitudinal - radial - rotational
Specific gravity
hammer mill
course grind
25. The breakdown of solid material through the application of mechanical forces- size reduction
homogenization
caustic peeler
Comminution
water activity
26. Most energy used for size reduction goes to
hydrometer
turbulent
First stage to create small particle size- second to disperse clumping
heat
27. 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.
fine grine
vacuum cooling
Electrostatic separators
First stage to create small particle size- second to disperse clumping
28. Efficient mixing is achieved by creating and recombining fresh surfaces
kneading
size reduction ratio
Magnetic separators and metal detection
hydrocooling
29. Generally used for products with high mechanical strength and low moisture - Relies on density and area difference
hurdle technologies
Air classifiers (AKA aspiration cleaners
mass balance
Magnetic separators and metal detection
30. Swirls in the flow
impact
turbulent
wet cleaning equipment
batch - convayer - immersion - truck
31. What factors affect the degree of mixing that can be achieved with dry powders or particulate solids?
peeling
relative density
shear
second pressure drop
32. Gum- fruit by the foot
shear rate
mixers for dry powder or particulate solids
ductile foods
second pressure drop
33. Helps prevent blinding
rollers
non- newtonian fluids
vibrating
mixers for high viscosity liquids
34. Not always effective (attached soil) - Can be dusty (explosion hazard) - Recontamination hazard - Can damage product
Problems with dry cleaning methods
panning
course grind
hydrometer
35. 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.
egg - vinegar - oil
forced- air cooling
caustic peeler
latent heat
36. Mixing component that is undesired
shear stress
rotational
laminar
Problems with dry cleaning methods
37. Amount of energy from solid to liquid and vice versa
cutting- miller- pulper
crumbly
second pressure drop
Latent heat of fusion
38. Pressure- pushing but not dynamically loaded
strain
screens
Problems with dry cleaning methods
compressive force
39. Force that causes it to have friction with itself
hurdle technologies
Specific heat
shear
size reduction ratio
40. 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
pulping
Pin and disc mill
stress
hydrocooling
41. Limited number of applications where contaminants have a different surface charge from the raw material
peeling
Miscibility
baffle and angle
Electrostatic separators
42. 4 types of hydrocoolers
batch - convayer - immersion - truck
roblems with wet cleaning
hydrocooling
caustic peeler
43. Pseudoplastic
hydrometer
sol
shear- thinning fluids
reynolds number
44. Force between the layers in the fluid
shear stress
wet cleaning equipment
shear- thinning fluids
water activity
45. Loss of soluble components (e.g. sugar) - Cost of water and water disposal - Accelerate microbial/biological degradation
roblems with wet cleaning
Comminution
colloids
sorting
46. = initial avg particle size/final avg particle size
latent heat
fine grine
size reduction ratio
screens
47. Used to chop meat and harder fruits and veggies into pulp
baffle and angle
homogenization
roller
bowl chopper
48. The ability to form a homogenous mixture
shear - impact - compression
heat
longitudinal - radial - rotational
Miscibility
49. A friable food is
crumbly
hammer mill
disc mill
attrition mills
50. Amount of energy it takes to change the temperature
wet cleaning equipment
shear rate
rotational
Specific heat