What safty device in a pneumatic system prevents over pressurization of the compressor tank? 1) filter/dryer 2)pop-off valve 3)regulator 4)line oiler

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ANSWER AND EXPLANATION: C. Regulator Is the answer because that regulates the pressure and how much PSI is going into and thru the compressor tank and or the pump tools the tools that push out the air like a air gun or a Ball Needle Pin Thingy!