If you are expecting a reading of 120 pounds per square inch (psi) (827 kilopascals [kPa]) while you are pressure testing an automatic transmission and you select a gauge that reads up to 400 psi (2,758 kPa), you may not get an accurate reading.

Question

Quizplus · Accepted Answer

A gauge that reads up to 400 psi (2,758 kPa) will not be accurate for a reading of 120 psi (827 kPa) because the gauge will not be able to resolve the smaller pressure difference.

If You Are Expecting a Reading of 120 Pounds Per