A suction gauge reads 100 psig. What is that pressure in psia?
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 suction gauge reads 100 psig. What is that pressure in psia?
- 85.3 psia
- 100 psia
- 114.7 psiaCorrect answer
- 129.4 psia
Why “114.7 psia” is correct
Gauges read pressure above the atmosphere, so absolute pressure is gauge pressure plus 14.7 psi at sea level. 100 + 14.7 = 114.7 psia.
Source: EPA: Test Topics
Why the other answers are wrong
- 85.3 psia — This subtracts 14.7 instead of adding it.
- 100 psia — psig and psia differ by atmospheric pressure, so they are not equal.
- 129.4 psia — This adds 14.7 twice.
Practice more of this
More EPA 608 Type II practice questions, or see every EPA 608 practice test.
Unofficial, not affiliated with the EPA or any EPA-approved certifying organization. Questions are original practice written from public EPA material, not real exam questions.