【Daily Question】Chemical Analysis Edition, 4.12.2021
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This post was last edited by zjp on 2021-4-12 08:16. Multiple-choice question: What are the differences between open-cup and closed-cup flash point testers? ( ). A. Different instruments B. Different thermometers C. Different heating and ignition conditions D. Different crucibles Answer: A and C
AC, it should be set so that the answer is visible only to the person who entered it or to the forum owner
For AC, different instruments may have other differences as well, but the main difference is C; since C is present, then A must also be present. There isn’t a strict distinction between a thermometer and a crucible, right?
The crucible is probably not the right one; the container used for determining the flash point is generally called an experimental cup. The crucible is used for conducting tests on residual carbon, ash content, etc. In fact, thermometers come in different ranges and with varying divisions, but they are all referred to as thermometers; it’s not a big problem: lol