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Hydraulics Exam | Fluid Mechanics Practice Questions & Verified Answers |

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Get focused, exam-ready preparation for Hydraulics with a comprehensive practice resource covering essential fluid-power and hydraulic-system concepts. Review fluid properties and viscosity, pressure and head, flow measurement, continuity and energy principles, pipe flow, friction and minor losses, pumps, hydraulic motors and cylinders, directional and pressure-control valves, meter-in and meter-out circuits, regenerative circuits, accumulators, reservoirs, filtration, cooling systems, cavitation, contamination, hydraulic circuit analysis, troubleshooting, maintenance, and safe system operation. Designed for students, technicians, and candidates preparing for hydraulics, fluid-power, and related engineering assessments, this resource provides targeted practice questions and verified answers to reinforce calculations, system operation, component functions, and practical hydraulic troubleshooting.

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-Loose hard sleeve connections If the pump loses prime, or cannot achieve prime, during drafting operations, the
-Open Drains pump operator should check for?
-Open unused intakes


Clear, dry, road conditions Wisconsin laws pertaining to road operation of fire apparatus are written to apply to
____________________.



25psi How much pressure loss would you have if your nozzle were 50 feet above the
pump?



Engine coolant temperature The purpose of the auxiliary cooler is to help control ________________________.




115psi What is the pump discharge pressure for 300' of 2 1/2" hose flowing through an 1
1/4" nozzle? (The coefficient for 2 1/2" hose is 2)



Compound gauge The gauge which is connected to the intake side of the pump, is the ____________.




13.56ft What would be your lift if the vacuum gauge read 12 inches of mercury while you
were drafting?



At an intersection The most likely place for emergency vehicles to become involved in an accident is
__________________________.



150 The rule of thumb for supplying a sprinkler system is _____________psi.




Nozzle Reaction The force directed against people, or the device holding a nozzle, by the velocity of
water being discharged, is known as ___________________.



Be prepared to yield the right-of-way The fire apparatus Driver/Operator should always _____________ when
responding to emergencies.



95psi What is the friction loss in 200' of 1 3/4" hose flowing 175 GPM? (The coefficient for
1 3/4" hose is 15.5)



Water flow in GPM Flow meters provide?




50mph A vehicle begins to outrun the effective range of its audible warning device (siren)
at?



Possibly subject to prosecution A Driver/Operator that violates statutes is _______________________.

, -Map Reading The fire apparatus Driver/Operator must have skills in ____________.
-Mathematics
-Writing


325 GPM What is the flow from a 1 1/4" nozzle?




Direct application All are methods of applying class B foam except?




To check for fluid leaks What is the purpose for looking beneath the vehicle during an inspection?




True Water will flow through a centrifugal pump if the pump is not turning.




Turn the wheel in the direction of the skid As a Driver/Operator; what should you do if the apparatus enters a skid?




300-500ft How far apart should emergency vehicles be when responding along the same
route?



A rotary vane pump The primer that utilizes positive displacement is _________________________.




Maintain steady pressure on the brakes. How should you use the brakes of a vehicle with an anti-lock braking system?




Only after coming to a complete stop and ensuring all When, as a Driver/Operator while driving emergent, can you pass through a red
lanes of traffic are accounted for traffic light or stop sign?



Do not back the apparatus When backing the apparatus; what should be done if a driver/operator does not
have or cannot see the spotter?



To have a clear path to the scene Staged engine companies should position ___________during level I staging.




200psi All discharge valves should be designed so that they are easily operable at
pressures up to _____________.



.434psi A one square inch column of water one foot high exerts __________ at the base.




195psi What is the pump discharge pressure for 200' of 2 1/2" hose supplying two 150' 1
3/4" hose lines each with a 15/16" smooth bore nozzle? ( The coefficient for 2 1/2"
hose is 2 and 1 3/4" hose is 15.5)

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