Question:
In a rubber sample with a Mooney viscosity of 60 ML(1+4) 100°C, the number 4 signifies
In a rubber sample with a Mooney viscosity of 60 ML(1+4) 100°C, the number 4 signifies
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The Mooney viscosity test uses a specific time for preheating and measurement. The time after starting the motor is indicated in the notation.
Updated On: Nov 27, 2025
- Applied shear rate in s\(^{-1}\)
- Number of samples tested
- Time in minutes after starting the motor when the measurement is taken
- Preheating time in minutes
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The Correct Option is C
Solution and Explanation
In Mooney viscosity measurement, the notation \( \text{ML(1+4)} \) indicates that the rubber sample is measured in the Mooney viscometer after 1 minute of preheating and 4 minutes of measurement. The number 4 signifies the time in minutes after starting the motor when the measurement is taken.
Therefore, the number 4 refers to the time the sample has been subjected to shear after the motor starts, and is not related to the applied shear rate or the number of samples.
Thus, the correct answer is C.
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