China · Ministry of Education / NEEA and universities · pg · unverified source
Unverified for this discipline. The general format is politics 100 + foreign language 100 + two subject papers of 150 (see the agricultural engineering and agribusiness tracks).
Dairy science in China is usually studied within Food Science and Engineering (including dairy engineering programmes at agricultural universities). University-set specialist papers were not checked.
Official source: https://yz.chsi.com.cn/
Original questions written to this exam's published syllabus and pattern. Not past papers.
1. What is the Laplace pressure inside an oil droplet of radius 0.5 µm if the interfacial tension is 10 mN/m?
A. 40 kPa
ΔP = 2γ/r = 2 × 0.010/(0.5 × 10⁻⁶) = 40,000 Pa = 40 kPa. 20 kPa forgets the factor 2 or uses the diameter.
Dairy Colloids: Emulsions, Foams & Gels · Interfacial science and surfactants
2. On Labuza's food stability map, lipid oxidation is minimal near:
B. The monolayer moisture content
Very dry systems oxidise faster; water near the monolayer protects; oxidation rises again at higher aw.
Advanced Dairy Chemistry · Water activity, glass transition and state diagrams
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