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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. Helps prevent blinding
non- newtonian fluids
vibrating
strain
longitudinal - radial - rotational
2. Size reduction equipment in order of decreasing size
cutting- miller- pulper
ductility
Problems with dry cleaning methods
hammer mill
3. Ratio below 8:1
hydrocooling
course grind
second pressure drop
shear
4. Dimensionless group that describes flow characteristics - includes pipe diameter - average velocity of fluid flow - fluid density - and fluid viscosity.
Latent heat of fusion
reynolds number
cutting- miller- pulper
course grind
5. Separate products by size
shear- thinning fluids
screens
shear
ductile foods
6. 3 things used for size reduction
Pin and disc mill
shear - impact - compression
over-run
nip
7. Not always effective (attached soil) - Can be dusty (explosion hazard) - Recontamination hazard - Can damage product
Problems with dry cleaning methods
compressive force
emulsifying/homogenizing
pulping
8. Paddle - Multiple Impeller - Turbine - Propeller
hammer mill
Mixers for Low-or Medium Viscosity Liquids
strain
panning
9. Limited number of applications where contaminants have a different surface charge from the raw material
Electrostatic separators
egg yolk
forced- air cooling
stress
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.
screens
roller
strain
vacuum cooling
11. 3 components of mixing liquids
oil/vinegar
hydrocooling
longitudinal - radial - rotational
caustic peeler
12. 4 types of hydrocoolers
First stage to create small particle size- second to disperse clumping
hydrocooling
hydrometer
batch - convayer - immersion - truck
13. Generally mixed with slow-speed - vertical-shaft impellers such as a anchor and gate agitator
screens
Miscibility
high viscosity liquids
shear - impact - compression
14. The ability to form a homogenous mixture
pulping
stress
Miscibility
crumbly
15. Shear and impact forces - used for spice manufacturing - 70:30 impact predominated
ductile foods
newtonian fluid
Pin and disc mill
size reduction ratio
16. To achieve a uniform distribution of the components of flow
goal of mixing
cutting- miller- pulper
newtonian fluid
mixers for dry powder or particulate solids
17. Used to be was dividing things on one characteristic
hydrometer
screens
sorting
bulk density
18. 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
hydrocooling
stress
hurdle technologies
egg yolk
19. Each thing we do to prevent degradation is one hurdle- name an example- packaging
shear stress
hurdle technologies
second pressure drop
shear rate
20. Most energy used for size reduction goes to
Problems with dry cleaning methods
heat
egg yolk
over-run
21. Linear
screens
laminar
sugar content
turbulent
22. What can be done to minimize the rotational component in liquid mixing?
high viscosity liquids
bowl chopper
baffle and angle
sugar content
23. Flour milled using this
impact
shear stress
roller
longitudinal - radial - rotational
24. The breakdown of solid material through the application of mechanical forces- size reduction
batch - convayer - immersion - truck
Pin and disc mill
attrition mills
Comminution
25. Pressure- pushing but not dynamically loaded
compressive force
fine grine
latent heat
ductility
26. Soaking tanks (with or w/o stirring/paddles) - Flotation washing (fluming) - Spray washers (belts - drums) - Brush washers - Ultrasonic cleaners
vibrating
panning
attrition mills
wet cleaning equipment
27. Pseudoplastic
compressive force
shear- thinning fluids
sugar content
Specific heat
28. Available moisture (relative vapor pressure)
size reduction ratio
Pin and disc mill
peeling
water activity
29. Rotating vessel slowly deposits material on top
oil/vinegar
reynolds number
shear rate
panning
30. Tumbling action inside a rotating vessel - Screw type - Double Reversing agitators
peeling
Specific gravity
latent heat
mixers for dry powder or particulate solids
31. Advantages: chill and store in one place limits handling - Disadvantages: Can dry/dehydrate produce
forced- air cooling
sorting
screens
second pressure drop
32. Efficient mixing is achieved by creating and recombining fresh surfaces
egg - vinegar - oil
kneading
Mixers for Low-or Medium Viscosity Liquids
Magnetic separators and metal detection
33. Amount of energy from solid to liquid and vice versa
latent heat of vaporization
Latent heat of fusion
heat
batch - convayer - immersion - truck
34. Requires size reduction of dispersed particles by the application of intense shearing forces
ductility
homogenization
cutting- miller- pulper
reynolds number
35. Why do we use two pressure drops? EXAM QUESTION
disc mill
First stage to create small particle size- second to disperse clumping
impact
panning
36. Shearing breaks up fat globules in milk- but they still want to clump- pass through ------ disperses them
shear
newtonian fluid
second pressure drop
wet cleaning equipment
37. Dividing based on several characteristics capable of automatically
Miscibility
Electrostatic separators
turbulent
grading
38. A friable food is
shear - impact - compression
Specific gravity
crumbly
longitudinal - radial - rotational
39. = mass of liquid
size reduction ratio
difference between rolls and biscuits
rotational
Specific gravity
40. Ratios above 100:1
over-run
fine grine
Specific heat
screens
41. Creates the smallest particle size
sugar content
forming
pulping
hammer mill
42. Deformation or stretch- change in length divided by the original length
hurdle technologies
strain
rotational
course grind
43. Track what goes into a system- account for everything that comes out minus what stays in the system
mass balance
second pressure drop
Specific heat
disc mill
44. High-speed mixers - Hydroshear homogenizer - Membrane emulsifiers - Pressure homogenizers - Rotor-stator homogenizers - Ultrasonic- sound energy to break particles
emulsifying/homogenizing
forming
crumbly
Specific gravity
45. Mixing component that is undesired
Air classifiers (AKA aspiration cleaners
Magnetic separators and metal detection
sorting
rotational
46. Used to mill wheat- cereals and flours
bulk density
second pressure drop
rollers
size reduction ratio
47. Amount of energy it takes to change the temperature
fine grine
Specific gravity
peeling
Specific heat
48. Force per unit area
mixers for high viscosity liquids
newtonian fluid
stress
vacuum cooling
49. Efficient (minimize losses) - Low Cost - No product degradation
compressive force
peeling
ductile foods
Specific gravity
50. 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
difference between rolls and biscuits
second pressure drop
forming
First stage to create small particle size- second to disperse clumping