• # question_answer The suction pressure is 1 bar and delivery pressure is 125 bar. What is the ideal intermediate pressure at the end of first stage for a 3-stage air compressor? A) 25 bar              B) 5 barC) 10 bar              D) 20 bar

${{p}_{i}}={{\left( \frac{{{p}_{3}}}{{{p}_{1}}} \right)}^{1/3}}$ $={{\left( \frac{125}{1} \right)}^{1/3}}=5\,\,\,bar$