Hoses & Nozzles Quiz Please sign up for the course before taking this quiz. To protect an operator from being doused with back splashed water, a brass swivel is mounted to a quick coupler key to isolate the back pressure in the hose.1 True False Getting enough water applied to the field in a short amount of time requires the right hose and adequate water pressure. What is the minimum size hose you should use?1 3/4 inch 1 inch 5/8 inch 1-1/2 inch Your hose nozzle should at the very least be able to provide:1 A tight stream. A fine fog. A flat mist. All of the above. Both A & B.