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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. 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
laminar
vibrating
disc mill
attrition mills
2. Efficient (minimize losses) - Low Cost - No product degradation
peeling
Mixers for Low-or Medium Viscosity Liquids
caustic peeler
ductile foods
3. Amount of energy from solid to liquid and vice versa
kneading
Latent heat of fusion
difference between rolls and biscuits
newtonian fluid
4. Most energy used for size reduction goes to
First stage to create small particle size- second to disperse clumping
hurdle technologies
heat
homogenization
5. High-speed mixers - Hydroshear homogenizer - Membrane emulsifiers - Pressure homogenizers - Rotor-stator homogenizers - Ultrasonic- sound energy to break particles
screens
course grind
emulsifying/homogenizing
difference between rolls and biscuits
6. Tumbling action inside a rotating vessel - Screw type - Double Reversing agitators
First stage to create small particle size- second to disperse clumping
stress
mixers for dry powder or particulate solids
sorting
7. Creates lots of heat - main force are shear action
shear- thinning fluids
grading
attrition mills
caustic peeler
8. Creates the smallest particle size
latent heat of vaporization
pulping
rollers
wet cleaning equipment
9. 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.
Specific gravity
sol
vacuum cooling
strain
10. Dividing based on several characteristics capable of automatically
turbulent
grading
bowl chopper
sol
11. Loss of soluble components (e.g. sugar) - Cost of water and water disposal - Accelerate microbial/biological degradation
roblems with wet cleaning
size reduction ratio
Comminution
oil/vinegar
12. 3 things used for size reduction
forced- air cooling
Air classifiers (AKA aspiration cleaners
egg - vinegar - oil
shear - impact - compression
13. Force between the layers in the fluid
shear stress
pulping
hydrometer
attrition mills
14. Concentrated fruit juices - liquid chocolate - and corn flour suspension
roblems with wet cleaning
non- newtonian fluids
compressive force
shear - impact - compression
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
shear- thinning fluids
hydrocooling
crumbly
vibrating
16. Rotating vessel slowly deposits material on top
Miscibility
panning
sugar content
newtonian fluid
17. Dimensionless group that describes flow characteristics - includes pipe diameter - average velocity of fluid flow - fluid density - and fluid viscosity.
reynolds number
laminar
fine grine
course grind
18. The breakdown of solid material through the application of mechanical forces- size reduction
hydrometer
Comminution
stress
vacuum cooling
19. Pressure- pushing but not dynamically loaded
compressive force
crumbly
grading
First stage to create small particle size- second to disperse clumping
20. Placed at goods intake - Before and after a unit operation - At the end of a line
Magnetic separators and metal detection
sol
kneading
Latent heat of fusion
21. Each thing we do to prevent degradation is one hurdle- name an example- packaging
hurdle technologies
shear stress
Latent heat of fusion
impact
22. Linear relationship between sheer rate and sheer stress
strain
newtonian fluid
size reduction ratio
shear stress
23. Mixing component that is undesired
pulping
Miscibility
rotational
wet cleaning equipment
24. Multiple paddle agitators - Planetary/Orbital - Z-Blade - Rotor-Stator
size reduction ratio
ductile foods
mixers for high viscosity liquids
second pressure drop
25. Size reduction equipment in order of decreasing size
cutting- miller- pulper
disc mill
relative density
Magnetic separators and metal detection
26. Why do we use two pressure drops? EXAM QUESTION
heat
disc mill
pulping
First stage to create small particle size- second to disperse clumping
27. Shearing breaks up fat globules in milk- but they still want to clump- pass through ------ disperses them
panning
second pressure drop
longitudinal - radial - rotational
emulsifying/homogenizing
28. Pseudoplastic
shear- thinning fluids
roblems with wet cleaning
First stage to create small particle size- second to disperse clumping
Miscibility
29. Leavening agent- breads have the yeast with CO2 giving us the lift in the bread- want this to take place before the breaking - Biscuit- leavening agent - chemical reaction- lots take place during baking process
over-run
difference between rolls and biscuits
sol
latent heat of vaporization
30. Separate products by size
shear rate
hydrocooling
screens
Specific heat
31. The ability to form a homogenous mixture
homogenization
Miscibility
goal of mixing
batch - convayer - immersion - truck
32. Requires size reduction of dispersed particles by the application of intense shearing forces
rotational
shear - impact - compression
batch - convayer - immersion - truck
homogenization
33. 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.
vacuum cooling
caustic peeler
First stage to create small particle size- second to disperse clumping
batch - convayer - immersion - truck
34. Soaking tanks (with or w/o stirring/paddles) - Flotation washing (fluming) - Spray washers (belts - drums) - Brush washers - Ultrasonic cleaners
bulk density
nip
pulping
wet cleaning equipment
35. Helps prevent blinding
vibrating
egg yolk
homogenization
nip
36. = (vol of foam - vol liquid)/vol liquid) x 100
over-run
pulping
roblems with wet cleaning
emulsifying/homogenizing
37. Shear and impact forces - used for spice manufacturing - 70:30 impact predominated
panning
ductility
Pin and disc mill
over-run
38. Limited number of applications where contaminants have a different surface charge from the raw material
emulsifying/homogenizing
Electrostatic separators
wet cleaning equipment
kneading
39. 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
forming
impact
panning
40. What can be done to minimize the rotational component in liquid mixing?
kneading
baffle and angle
shear - impact - compression
mass balance
41. Track what goes into a system- account for everything that comes out minus what stays in the system
Specific gravity
hurdle technologies
mass balance
second pressure drop
42. 4 types of hydrocoolers
rollers
impact
batch - convayer - immersion - truck
cutting- miller- pulper
43. = mass of liquid
Specific gravity
Electrostatic separators
Comminution
sugar content
44. Efficient mixing is achieved by creating and recombining fresh surfaces
stress
fine grine
sugar content
kneading
45. Used to be was dividing things on one characteristic
high viscosity liquids
compressive force
sorting
baffle and angle
46. A fluid suspension of a colloidal solid in a liquid
sol
longitudinal - radial - rotational
Pin and disc mill
hydrometer
47. Used to chop meat and harder fruits and veggies into pulp
bulk density
bowl chopper
rollers
impact
48. Advantages: chill and store in one place limits handling - Disadvantages: Can dry/dehydrate produce
shear
hammer mill
forced- air cooling
Air classifiers (AKA aspiration cleaners
49. Force that causes it to have friction with itself
abrasion peeling
shear
nip
roblems with wet cleaning
50. Ratios above 100:1
fine grine
First stage to create small particle size- second to disperse clumping
Pin and disc mill
hurdle technologies