AZ ROC C-49 Industrial Refrigeration Practice Questions - Arizona ROC C-49 Industrial Refrigeration (Commercial) Examination Exam

By throttling the main suction stop valve to restrict gas entering the rotors. By adjusting the motor frequency via an external resistance grid. By moving axially along the rotor bore to bypass uncompressed suction gas back to the suction port before compression begins. By opening a high-pressure bypass valve that recirculates hot discharge gas into the oil separator.