Auxiliary Machinery [caption id="attachment_2429" align="alignleft" width="366"] Economizer marin oil tanker[/caption] Explain what is meant by Pump exhaust pr Pump An aircraft that serves to move liquids or air  from one place to  another  with a pressure difference. Single acting piston pump Single acting piston pump is a pump that in 1 (one) time the suction andoce...