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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. 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
nip
mixers for dry powder or particulate solids
hydrocooling
egg yolk
2. Advantages: chill and store in one place limits handling - Disadvantages: Can dry/dehydrate produce
nip
mixers for dry powder or particulate solids
forced- air cooling
hydrometer
3. Ratio below 8:1
egg yolk
size reduction ratio
Air classifiers (AKA aspiration cleaners
course grind
4. 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
difference between rolls and biscuits
hammer mill
wet cleaning equipment
nip
5. 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.
nip
First stage to create small particle size- second to disperse clumping
vacuum cooling
emulsifying/homogenizing
6. Energy from liquid to gas and vice versa
bowl chopper
latent heat of vaporization
forced- air cooling
difference between rolls and biscuits
7. Pseudoplastic
kneading
shear- thinning fluids
Air classifiers (AKA aspiration cleaners
homogenization
8. 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
forming
Pin and disc mill
disc mill
bulk density
9. Flour milled using this
roller
vibrating
Magnetic separators and metal detection
size reduction ratio
10. = (vol of foam - vol liquid)/vol liquid) x 100
over-run
screens
shear - impact - compression
peeling
11. Dividing based on several characteristics capable of automatically
First stage to create small particle size- second to disperse clumping
sugar content
hydrocooling
grading
12. Why do we use two pressure drops? EXAM QUESTION
course grind
First stage to create small particle size- second to disperse clumping
Mixers for Low-or Medium Viscosity Liquids
vibrating
13. Requires size reduction of dispersed particles by the application of intense shearing forces
Magnetic separators and metal detection
homogenization
longitudinal - radial - rotational
sugar content
14. Tumbling action inside a rotating vessel - Screw type - Double Reversing agitators
Electrostatic separators
roblems with wet cleaning
mixers for dry powder or particulate solids
second pressure drop
15. What factors affect the degree of mixing that can be achieved with dry powders or particulate solids?
goal of mixing
relative density
difference between rolls and biscuits
Pin and disc mill
16. Swirls in the flow
panning
stress
laminar
turbulent
17. Emulsifier in mayo
Comminution
egg yolk
second pressure drop
turbulent
18. Involves tumbling in a drum with a silicon carbide or carborundum surface
longitudinal - radial - rotational
Latent heat of fusion
abrasion peeling
bulk density
19. Force that causes it to have friction with itself
difference between rolls and biscuits
rollers
shear
Latent heat of fusion
20. Used to chop meat and harder fruits and veggies into pulp
vibrating
bowl chopper
disc mill
hydrocooling
21. Deformation or stretch- change in length divided by the original length
latent heat
shear
non- newtonian fluids
strain
22. Limited number of applications where contaminants have a different surface charge from the raw material
Electrostatic separators
impact
second pressure drop
course grind
23. Not always effective (attached soil) - Can be dusty (explosion hazard) - Recontamination hazard - Can damage product
Comminution
course grind
Problems with dry cleaning methods
caustic peeler
24. High-speed mixers - Hydroshear homogenizer - Membrane emulsifiers - Pressure homogenizers - Rotor-stator homogenizers - Ultrasonic- sound energy to break particles
emulsifying/homogenizing
vibrating
compressive force
hurdle technologies
25. = mass of liquid
Comminution
First stage to create small particle size- second to disperse clumping
Specific gravity
abrasion peeling
26. Separate products by size
cutting- miller- pulper
Latent heat of fusion
screens
latent heat of vaporization
27. Linear
Pin and disc mill
laminar
Specific gravity
Specific heat
28. Pressure- pushing but not dynamically loaded
difference between rolls and biscuits
compressive force
rollers
disc mill
29. Creates the smallest particle size
pulping
Latent heat of fusion
heat
second pressure drop
30. Generally mixed with slow-speed - vertical-shaft impellers such as a anchor and gate agitator
screens
high viscosity liquids
crumbly
kneading
31. 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.
caustic peeler
reynolds number
batch - convayer - immersion - truck
newtonian fluid
32. 4 types of hydrocoolers
batch - convayer - immersion - truck
shear - impact - compression
Miscibility
hurdle technologies
33. Multiple paddle agitators - Planetary/Orbital - Z-Blade - Rotor-Stator
mass balance
mixers for high viscosity liquids
mixers for dry powder or particulate solids
hydrocooling
34. Creates lots of heat - main force are shear action
attrition mills
sugar content
newtonian fluid
batch - convayer - immersion - truck
35. Size reduction equipment in order of decreasing size
cutting- miller- pulper
Electrostatic separators
mixers for dry powder or particulate solids
hurdle technologies
36. Paddle - Multiple Impeller - Turbine - Propeller
mixers for high viscosity liquids
Mixers for Low-or Medium Viscosity Liquids
longitudinal - radial - rotational
batch - convayer - immersion - truck
37. Force between the layers in the fluid
vacuum cooling
laminar
crumbly
shear stress
38. Generally used for products with high mechanical strength and low moisture - Relies on density and area difference
heat
sol
Air classifiers (AKA aspiration cleaners
Electrostatic separators
39. Under motion pushing
shear - impact - compression
impact
egg yolk
sugar content
40. Ability to deform permanently without breaking
rollers
latent heat of vaporization
abrasion peeling
ductility
41. Amount of energy it takes to change the temperature
Specific heat
emulsifying/homogenizing
mass balance
laminar
42. Gum- fruit by the foot
ductile foods
cutting- miller- pulper
pulping
egg yolk
43. Ingredients in mayo
egg - vinegar - oil
ductility
grading
Latent heat of fusion
44. Shear and impact forces - used for spice manufacturing - 70:30 impact predominated
Specific heat
Pin and disc mill
disc mill
reynolds number
45. What can be done to minimize the rotational component in liquid mixing?
oil/vinegar
bulk density
baffle and angle
Problems with dry cleaning methods
46. Soaking tanks (with or w/o stirring/paddles) - Flotation washing (fluming) - Spray washers (belts - drums) - Brush washers - Ultrasonic cleaners
Specific gravity
rollers
second pressure drop
wet cleaning equipment
47. A fluid suspension of a colloidal solid in a liquid
wet cleaning equipment
mixers for dry powder or particulate solids
high viscosity liquids
sol
48. 3 components of mixing liquids
Pin and disc mill
longitudinal - radial - rotational
strain
abrasion peeling
49. Efficient mixing is achieved by creating and recombining fresh surfaces
high viscosity liquids
newtonian fluid
kneading
vibrating
50. Amount of energy from solid to liquid and vice versa
homogenization
roller
Latent heat of fusion
panning