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A fire apparatus should be started with all electrical switches in the off position in order to - correct answer Start the engine without load Fire apparatus inverters - correct answer Limited to less than 1500 watts Overall lighting for an incident scene is most often provided by - correct answer Fixed lights Four pre service tests - correct answer Road tests, independent pump certification test, hydrostatic tests, purchase acceptance tests Engine performance - correct answer Fuel, oil, mileage record Periodic documentation captures - correct answer Safety inspection With a fixed rescue tool supply systems, a manifold can be compared to - correct answer A junction box On the vacuum service test, once the engine is turned off, the column of mercury should fall no more than - correct answer 10 inches 5 minutes When maintaining fire apparatus records you should - correct answer Refer to your departments standard operating procedures for specific guidance Driving several jets of water together to create a fog pattern is called - correct answer Impinging stream For fire service functions water distribution systems are best when - correct answer Their mains are secondaries are arranged in loops
Lift - correct answer The vertical distance from the surface of the water to the middle of the intake It is important to monitor the water level in the onboard tank because - correct answer You need to know if the incident requires additional water before the tank is empty One of the greatest dangers involved in a tandem pumping operation is to - correct answer Exceed the rated pressure of the hose or pump When shutting down a constant pressure repay it is important to - correct answer Start with the attack pumper and work backward to the source pumper The major advantage of a reverse lay is that it - correct answer Permits the pumper to boost the hydrant pressure easily The design of any relay pumping operations is driven mainly by the - correct answer Desired flow at the fire scene The big advantage of centrifugal pumps over positive displacement pumps is that centrifugal pumps - correct answer Can provide water in variable pressures and volumes To transfer pressure a piston positive displacement pump uses the principal - correct answer Of the incompressibility of a liquid When batched or pre mixed class a foams lose their foaming properties aftdr - correct answer 24 hours The pressure control service test measures pressure control devices at three different points - correct answer 150 psi 90 psi 250 psi
In centrifugal pumps, to correct for lateral thrust wear on parts, the pump - correct answer Has water enter the impeller in both directions One of the drawbacks of a piston positive displacement pump is that the - correct answer Fire stream tends to pulsate Class b foams on hydrocarbons can be used in concentrations of up to - correct answer 3% Identify the true statement about a fire apparatus with an automatic transmission - correct answer Gives you the option of selecting a gear You may need to perform a confined space turnaround - correct answer For a reverse hose lay in a narrow street or intersection Bouncing water off the inside walls of the nozzle bore to create a fog pattern is called - correct answer Periphery deflection Most flowmeters in use have a design based on - correct answer A spring probe Fog nozzles are best used to aerate - correct answer All class a foams In a water distribution system, an os£y valve - correct answer Uses a threaded stem to control the valve The term specific heat refers to the - correct answer Ability of any substance to absorb heat Most flowmeters in use have a design based on - correct answer A spring probe