CCS CCS Sensory Evaluation & Food Analysis 1 — Questions and Answers
Question 1: Which sensory attribute refers to the perceived thickness or consistency of a liquid food product?
- Viscosity (Correct answer)
- Elasticity
- Cohesiveness
- Adhesiveness
Correct answer: Viscosity
Viscosity describes the resistance of a liquid to flow, perceived as thickness or consistency in food products.
Question 2: What is the primary purpose of a triangle test in sensory evaluation?
- To rank products by preference
- To determine if a detectable difference exists between two products (Correct answer)
- To measure overall acceptability
- To identify specific flavor compounds
Correct answer: To determine if a detectable difference exists between two products
The triangle test presents three samples (two identical, one different) to determine if panelists can detect a significant difference between two products.
Question 3: Which analytical method measures the force required to bite through a food product?
- Colorimetry
- Rheology
- Texture profile analysis (Correct answer)
- Aw measurement
Correct answer: Texture profile analysis
Texture profile analysis (TPA) measures mechanical properties including hardness, defined as the force required to compress a food sample to a given deformation.
Question 4: The Maillard reaction between amino acids and reducing sugars produces which sensory attributes?
- Sweetness and translucency
- Brown color and roasted flavor (Correct answer)
- Sourness and effervescence
- Bitterness and astringency
Correct answer: Brown color and roasted flavor
The Maillard reaction produces brown pigments (melanoidins) and hundreds of volatile compounds responsible for roasted, complex flavors.
Question 5: In hedonic scaling used in consumer testing, a 9-point scale typically ranges from what to what?
- 1 (extremely bad) to 9 (extremely good)
- 1 (dislike extremely) to 9 (like extremely) (Correct answer)
- 1 (too little) to 9 (too much)
- 1 (not acceptable) to 9 (highly acceptable)
Correct answer: 1 (dislike extremely) to 9 (like extremely)
The 9-point hedonic scale ranges from 'dislike extremely' (1) to 'like extremely' (9), measuring affective consumer response to a product.
Question 6: Which instrument objectively measures food color using the CIE L*a*b* color space?
- Refractometer
- Colorimeter or spectrophotometer (Correct answer)
- Rheometer
- Gas chromatograph
Correct answer: Colorimeter or spectrophotometer
A colorimeter or spectrophotometer measures food color using CIE L*a*b* coordinates where L* is lightness, a* is red/green, and b* is yellow/blue.
CCS CCS Sensory Evaluation & Food Analysis 1
Which sensory attribute refers to the perceived thickness or consistency of a liquid food product?