week13C1 : QA/Qc Flashcards
What is quality control?
involves testing (representative samples) of the finished product to determine whether they meet the specifications that have been set for the product.
What is quality assurance?
involves taking measures to ensure that the processing steps are properly performed, which should ensure that the finished products are of consistent quality.
What are the two categories into which the characteristic of a product may be subdivided into?
- Sensory qualities
2. Hidden qualities
What are the three categories into which the sensory qualities can be subdivided into?
- Appearance
- Textural
- Flavor
____ on chocolat is due to the fat crystallization and is a defect in the _____ attributes
fat bloom
appearance
Name the different methods to measure the colors
- human eye
- spectrophotometer
- tristimulus colorimetter
What is the use of the standard plate in the case of the evaluation of the color ?
The standard plate is made to represent the desired color to compare with the color seen (subjective method)
What are the various word used to describe liquids and pastes?
- Viscous
- non-viscous
- smooth
- creamy
What are the various words related to texture used to describe solids?
- crisp
- chewy
- crunchy
- soggy
What is rheology?
the study of the deformation and flow of matter
What is the name of the device that measure the time it takes for a viscous fluid to flow on a inclined plane
Botswick consistometer
What is the name of the device that measure the viscosity by applying a force on the liquid
viscometer
How is measured the solid and semi-solid foods?
by applying various forces like compression (squeezing), shear (cutting), and tension (pulling) or combinations thereof (chewing).
Name a texture measuring machine
Instron Universal Testing Machine
What is the fundamental rule associated with all food products?
If it doesn’t taste good, no one will eat it
Name four intstruments that can objectively measure some flavour parameters
- pH meter
2 Gas chromatography - Refractometers
- Conductivity measurements
What is the instrument used to measure the sugar content ?
refractometers
What is the instrument used to measure the salt concentration?
conductivity measurements
How are determined the best before dates?
with accelerated storage trials
What are unit operations?
discrete steps of the food processing
Name de common unit operations
- Materials handling
- cleaning related operations
- Separation related operations
- Disintegration-related operations
- Mixing related operation
- Heat exchange related operation
- Evaporation/concentration related operation
- Drying related operation
- Forming/shaping related operations
- Packaging related operations
- Controlling-related operations
Name the unit operation related to this sentence : liquid nitrogen is used to cool fruits and vegetables at harvest and during transport to reduce their rate of respiration.
Material handling
What is the unit operation responsible for the contamination?
material handling
Name the unit operation related to this sentence : a common primary unit operation for most products is the removal of extraneous matter:
Cleaning-related
sophisticated ______ systems exist for automated liquid processing equipment
clean-in-place (CIP)
Name the unit operation related to this sentence : Peeling of potatoes: one of the most important steps in potato processing
Separation-related operation
Separation of whey proteins from whey is a separation ___ from liquid
solid
Pressing juice from fruit is a separation ____ from solid
liquid
Name the unit operation related to this sentence : Slicing of potatoes for potato chips
Disintegration-related operations
Disintegration-related operations involve a _____ in size
reduction
Name the unit operation related to this sentence : ribbon blending of spices/soup mix
Mixing-related operations
Name the unit operation related to this sentence : to produce
evaporated milk, maple syrup, or juice concentrates.
evaporation/concentration-related operations
for temperature-sensitive products, heating operations may be carried out under ____
vacuum
Name the unit operation related to this sentence :
Reduce water activity and product weight
Can be evaporation/concentration-related operations
or Drying-Related Operations
What are susceptor*-based packaging
*A susceptor is a material that absorbs microwave energy and converts it to heat, which may be re-emitted as infrared radiation
T or F : Packaging is not always the final unit operation
T
Measures implemented to ensure that the processing steps are properly performed to ensure that the finished products are of consistent quality.
Quality assurance
An instrument that measures the time for a viscous fluid product to flow down an inclined plane.
Bostwick consistometer
A …… can be used to determine sugars concentration.
Refractometer
Nutritional value of a food product is classified as …… quality attribute
Hidden
Food manufacturing processes are managed as a wholistic unit
False, hence why they are unit operations
T or F : measuring texture is more complex than measuring viscosity
T
