SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
|
Email
Search
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. Limited number of applications where contaminants have a different surface charge from the raw material
ductile foods
Electrostatic separators
attrition mills
latent heat of vaporization
2. Soaking tanks (with or w/o stirring/paddles) - Flotation washing (fluming) - Spray washers (belts - drums) - Brush washers - Ultrasonic cleaners
shear- thinning fluids
Air classifiers (AKA aspiration cleaners
wet cleaning equipment
pulping
3. Used to be was dividing things on one characteristic
impact
abrasion peeling
sorting
homogenization
4. Measures specific gravity
hydrometer
Electrostatic separators
pulping
water activity
5. Concentrated fruit juices - liquid chocolate - and corn flour suspension
non- newtonian fluids
compressive force
peeling
ductile foods
6. 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.
Air classifiers (AKA aspiration cleaners
roller
turbulent
caustic peeler
7. Each thing we do to prevent degradation is one hurdle- name an example- packaging
crumbly
hurdle technologies
rotational
Air classifiers (AKA aspiration cleaners
8. Flour milled using this
roblems with wet cleaning
pulping
disc mill
roller
9. Most energy used for size reduction goes to
heat
compressive force
goal of mixing
mixers for high viscosity liquids
10. Not always effective (attached soil) - Can be dusty (explosion hazard) - Recontamination hazard - Can damage product
Problems with dry cleaning methods
strain
Comminution
emulsifying/homogenizing
11. 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
rotational
high viscosity liquids
disc mill
cutting- miller- pulper
12. Tumbling action inside a rotating vessel - Screw type - Double Reversing agitators
heat
Electrostatic separators
mixers for dry powder or particulate solids
egg - vinegar - oil
13. Dispersed phase in mayo
oil/vinegar
shear- thinning fluids
over-run
wet cleaning equipment
14. 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
rollers
reynolds number
forming
Mixers for Low-or Medium Viscosity Liquids
15. A fluid suspension of a colloidal solid in a liquid
sol
pulping
compressive force
heat
16. High-speed mixers - Hydroshear homogenizer - Membrane emulsifiers - Pressure homogenizers - Rotor-stator homogenizers - Ultrasonic- sound energy to break particles
rollers
emulsifying/homogenizing
Problems with dry cleaning methods
panning
17. Multiple paddle agitators - Planetary/Orbital - Z-Blade - Rotor-Stator
Miscibility
mixers for high viscosity liquids
sugar content
impact
18. Shear and impact forces - used for spice manufacturing - 70:30 impact predominated
vacuum cooling
Miscibility
Pin and disc mill
fine grine
19. Amount of energy it takes to change the temperature
relative density
Specific heat
mixers for high viscosity liquids
hydrometer
20. Track what goes into a system- account for everything that comes out minus what stays in the system
egg yolk
cutting- miller- pulper
mass balance
Electrostatic separators
21. Dimensionless group that describes flow characteristics - includes pipe diameter - average velocity of fluid flow - fluid density - and fluid viscosity.
nip
caustic peeler
First stage to create small particle size- second to disperse clumping
reynolds number
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
roller
size reduction ratio
hammer mill
bowl chopper
23. Ratios above 100:1
crumbly
mixers for high viscosity liquids
shear
fine grine
24. Placed at goods intake - Before and after a unit operation - At the end of a line
egg yolk
vibrating
hydrocooling
Magnetic separators and metal detection
25. Dividing based on several characteristics capable of automatically
second pressure drop
Magnetic separators and metal detection
grading
Specific heat
26. Linear relationship between sheer rate and sheer stress
newtonian fluid
second pressure drop
Specific heat
shear - impact - compression
27. The breakdown of solid material through the application of mechanical forces- size reduction
Comminution
ductility
mixers for dry powder or particulate solids
roblems with wet cleaning
28. Gum- fruit by the foot
second pressure drop
ductile foods
roblems with wet cleaning
attrition mills
29. = (vol of foam - vol liquid)/vol liquid) x 100
mass balance
water activity
latent heat of vaporization
over-run
30. Advantages: chill and store in one place limits handling - Disadvantages: Can dry/dehydrate produce
laminar
egg yolk
oil/vinegar
forced- air cooling
31. Generally mixed with slow-speed - vertical-shaft impellers such as a anchor and gate agitator
high viscosity liquids
second pressure drop
over-run
ductile foods
32. Involves tumbling in a drum with a silicon carbide or carborundum surface
bowl chopper
strain
abrasion peeling
sorting
33. Energy from liquid to gas and vice versa
sol
egg yolk
relative density
latent heat of vaporization
34. 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.
vacuum cooling
sol
Specific heat
forming
35. Distance between rollers
colloids
nip
emulsifying/homogenizing
fine grine
36. Shearing breaks up fat globules in milk- but they still want to clump- pass through ------ disperses them
roblems with wet cleaning
fine grine
second pressure drop
egg yolk
37. Pressure- pushing but not dynamically loaded
bowl chopper
second pressure drop
compressive force
Specific heat
38. Deformation or stretch- change in length divided by the original length
Pin and disc mill
Magnetic separators and metal detection
strain
fine grine
39. 3 components of mixing liquids
disc mill
longitudinal - radial - rotational
mixers for dry powder or particulate solids
ductile foods
40. Why do we use two pressure drops? EXAM QUESTION
turbulent
roblems with wet cleaning
Pin and disc mill
First stage to create small particle size- second to disperse clumping
41. Linear
non- newtonian fluids
laminar
mass balance
heat
42. Used to mill wheat- cereals and flours
rollers
hammer mill
shear stress
bulk density
43. Under motion pushing
Electrostatic separators
shear- thinning fluids
impact
peeling
44. Available moisture (relative vapor pressure)
water activity
vibrating
rollers
sorting
45. Helps prevent blinding
vibrating
screens
cutting- miller- pulper
attrition mills
46. Used to chop meat and harder fruits and veggies into pulp
bowl chopper
over-run
disc mill
homogenization
47. Size reduction equipment in order of decreasing size
roblems with wet cleaning
egg yolk
attrition mills
cutting- miller- pulper
48. Requires size reduction of dispersed particles by the application of intense shearing forces
goal of mixing
size reduction ratio
Magnetic separators and metal detection
homogenization
49. Mass
shear stress
shear rate
bulk density
egg - vinegar - oil
50. A friable food is
crumbly
longitudinal - radial - rotational
Problems with dry cleaning methods
Pin and disc mill