IFSA Hose Operations And Hose Streams Prep Exam Fully Solved 2024.

Designed for use in climates with freezing temperatures, the main control valve of this hydrant is located at the base or foot of the hydrant below the frost line - correct answer Dry barrel hydrant What type of stream is most commonly used for fires in confined spaces - correct answer Broken stream The velocity pressure at which water is discharged from the nozzle is (--) pressure - correct answer Nozzle pressure Recommended nozzle pressure for a hand held solid stream is - correct answer 50 Psi (350 kPA) What is NFPA terminology for a smooth bore nozzle? - correct answer Straight Tip The amount of heat required to raise the temperature of a specified mass of a material by one degree is the definition of - correct answer Specific heat Which stream application will cause the least expansion of the upper layer of fire gases in a compartment> - correct answer Short pulses of wide - angle fog into the gas layer If greater reach and volume are needed, the nozzle pressure for smooth bore hand line nozzles can be increased to ___ without becoming unmanageable. - correct answer 65 psi (450 kPa) How can water hammer be prevented - correct answer Open and close all valves slowly Most fog nozzles are designed to operate at which nozzle pressure - correct answer 100 Psi (690kPa) A wide angle fog pattern has (---) than a narrow angle pattern - correct answer Less velocity and reach