A pressure-temperature table lists a saturation pressure of 250 psia. What would a gauge read at that pressure?
Refrigeration · EPA 608 Type II. The correct answer, and the reasoning behind it.
Identifying refrigerants, system components and the state of refrigerant in each.
The question
A pressure-temperature table lists a saturation pressure of 250 psia. What would a gauge read at that pressure?
- 235.3 psigCorrect answer
- 250 psig
- 264.7 psig
- 279.4 psig
Why “235.3 psig” is correct
To convert absolute pressure to gauge pressure, subtract 14.7. 250 - 14.7 = 235.3 psig.
Source: EPA: Test Topics
Why the other answers are wrong
- 250 psig — Gauge and absolute pressure are not the same number.
- 264.7 psig — This adds 14.7 when it should be subtracted.
- 279.4 psig — This adds 14.7 twice.
Practice more of this
More EPA 608 Type II practice questions, or see every EPA 608 practice test.
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