Absolute vapor pressure of petrofuels is found by Reid bomb which is heated in water bath to 100°F. In Reid apparatus, the ratio of the volume of air chamber to that of the liquid fuel chamber is________________?
Correct answer: A. 4
- A. 4
- B. 3
- C. 2
- D. 1
Explanation
The Reid vapor-pressure bomb uses an air chamber four times the volume of the liquid chamber, giving an air-to-liquid volume ratio of 4:1. This fixed geometry standardises the reported vapour pressure.
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