20
ICAR JRF Dairy Chemistry 29 Jun 2024Shift 1
MCQ (Single Correct) +4 −1
The volume for each % division in milk Butyrometer corresponds to mi
  • Volumetric Calibration of Gerber Milk Butyrometer:
  • Butyrometer Scale Geometry:
  • The graduated neck of an IS: 1223 milk butyrometer measures $0 - 10\%$ fat for an $11\text{ mL}$ ($10.75\text{ mL}$) milk sample.
  • $1\%$ fat in an $11\text{ g}$ sample corresponds to $0.11\text{ g}$ milk fat. At $65^\circ\text{C}$ (fat density $\approx 0.892\text{ g/mL}$):
$$\text{Volume of } 1\%\text{ division} = \frac{0.11\text{ g}}{0.892\text{ g/mL}} = 0.125\text{ mL}$$
  • Conclusion: 0.125 mL (Option 2).

Correct option: (2) 0125

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