CFD Basic Apparatus and Hydraulics Practice Test

These questions are part of the practice quiz. Start practicing

• How does hose diameter affect friction loss at a given flow?
• Which entity are Class 1 fire protection systems designed for?
• What is the purpose of intake and discharge pressure gauges on a pumper?
• Head pressure in hydraulic calculations is expressed by multiplying vertical difference in feet by which constant?
• The operation of a centrifugal pump is based on the principle that water introduced at the center is thrown toward the outer edge from which part at the center?
• Which term describes the distance from the ground to the highest reach of the aerial device?
• Which statement about relief valve operation is correct?
• In firefighting hydraulics, how do attack lines differ from supply lines?
• Class 3 fire protection systems are designed for which groups?
• What two metrics are typically indicated in hydrant test data?
• Which term describes the pressure in a water distribution system during typical demand?
• The volute in a pump serves to do what to the cross-sectional area along the flow path?
• What is friction loss per 100 ft and how is it used in calculations?
• How do you handle a failing pump primer?
• What is water hammer and how can it be prevented during pumping operations?
• The discharge pressure of a centrifugal pump is influenced by the speed of the impeller.
• Should the discharge supply to a sprinkler system be shut down without instruction from the Incident Commander?
• Head pressure is calculated by multiplying the total vertical difference in feet by which constant?
• Which term describes the pressure caused by the elevation of a water column?
• The pressure created by a column of water due to elevation is known as ______.
• Abbreviation of inches of mercury?
• A standpipe with a height of 100 feet, containing water, would have a base pressure of ?
• In the hydraulic stabilization system, controlling stabilizers is achieved by directing fluid through valves using which system?
• How does suction lift influence pump performance?
• Positive Displacement Pumps have two main subtypes; one is Piston pump. What is the other subtype?
• Rotary pump has two subtypes: rotary gear and which?
• Total Dynamic Head (TDH) is the sum of which components?
• Effective apparatus operation ______ with the proper placement of apparatus at an incident.
• Which rpm range corresponds to the typical impeller operation?
• What is hydrostatic testing used for?
• What kind of actuator is specified for CFD apparatus valves?
• Which SOG specifies that an appropriate online form should be completed during the first hour of the shift?
• The forward pressure of a stream of water as it leaves an orifice (nozzle) is called ______.
• What is residual pressure in a firefighting hydraulic system?
• The online form must be completed during which time window?
• What is priming and why is it necessary for suction operations?
• How would you estimate friction loss for 200 ft of 1.75-inch hose delivering 150 GPM?
• What is the purpose of a deck gun control valve?
• If you suspect a leak in the discharge system during testing, what is the appropriate action?
• The aerial device is least stable when oriented perpendicular to the truck's longitudinal axis. Which description best matches this orientation?
• Which system supplies power to the hydraulic pump used for stabilizer control?
• During high-rise operations, who is responsible for pumping and maintaining the discharge pressure?
• The best victim rescue approach is always made on the ______ side of the fire if possible, however, the aerial tip should be placed directly at or just below the ________.
• What safety considerations are necessary when drafting near traffic or obstacles?
• Which two types of centrifugal pumps are described?
• Which standard governs the equipment requirements for fire pumps as described in the material?
• Which routine maintenance task should be performed on pumping equipment?
• What is the role of the discharge line when drafting from a hydrant?
• What component is used to relieve pressure after the discharge valve has been closed?
• At the same GPM, which statement about nozzle pressures is true?
• Which term describes the pressure remaining after friction and gravity have been accounted for in the network?
• Which are signs of a pump executing improperly and how would you troubleshoot?
• Nozzle pressure values and typical nozzle pressures?
• What action is prohibited on the side of the aerial that is short jacked?
• What safety considerations are essential during high-flow discharge operations?
• ______ requires each fire pump to be equipped with a pressure control valve?
• What checks should be performed before starting a pump?
• The forward pressure of a water stream leaving a nozzle is referred to as what?
• What term describes the amount of water a system can deliver per unit time, often referred to as volume in pump discussions?
• Which instrument is commonly used to verify hydrant performance during a test flow?
• Which standard governs the fire apparatus driver/operator professional qualification?
• What is a likely consequence of omitting a gasket at a hose or appliance connection?
• The passage area of the pump casing that increases in size as it gets closer to the discharge is known as what?
• Class 2 systems are designed for which group?
• During operation, which gauge reading verifies nozzle pressure and overall system performance?
• Which item completes the list of three main factors that influence a centrifugal fire pump's discharge pressure?
• Which term describes the energy stored to push water through pipes and hoses?
• When flushing the system, you should flush until what condition is met?
• What happens if a pump is not primed when drawing from a static source?
• Master intake gauge may also be referred as the vacuum or _______?
• NFPA 1901 requires each fire pump to be equipped with which device?
• Engines companies should __________?
• All CFD pumps are which type of pump?
• What is the maximum allowed increase above the valve set pressure, as specified by NFPA 1901?
• Which factor is not included in the Total Dynamic Head (TDH)?
• For a given GPM, choosing a larger-diameter hose will have what effect on friction loss per 100 ft?
• What is a relief valve on a pump and why is it used?
• What is static pressure in a firefighting hydraulic system?
• The aerial apparatus is least stable when the aerial device is operated __________- to the longitudinal axis of the truck.
• Which statement is true about EPU in power systems?
• What information is used to evaluate hydrant flow availability?
• In high-flow discharge operations, what does line discipline refer to?
• D/O should not allow residual pressure to fall below _____ on the master intake gauge
• Which of the following sets includes the three major discharge appliances commonly found on a pumper?
• In centrifugal pump terminology, what is the term for the central region where fluid enters the impeller?
• EPU stands for
• Select the correct expansion for the acronym EPU.
• Which option best describes the relationship between a ball valve and flow resistance?
• What is the effect of fittings and elbows on pressure loss?
• What is the purpose of hydrant connections, and their typical operation?
• Volume can also be called which term?
• According to NIOSH, what percentage of firefighter fatalities occur while responding to or returning from a call?
• Extending the aerial device beyond the roof edge serves which purpose?
• If discharge pressure is lower than expected with full throttle, what steps should you take?
• Centrifugal pumps are valued for flexibility and which other attribute?
• Which statement about friction loss charts is true?
• Two widely used pump types in the fire service include Positive Displacement Pump and which other pump?
• Which axis alignment improves stability of the aerial device?
• Which of the following is NOT one of the three main factors that influence a centrifugal fire pump's discharge pressure?
• Stored potential energy for forcing water thru pipe, fittings, fire hose and adaptors is known as ______.
• Which factor is directly linked to the speed of the impeller?
• How can you verify that a hydrant can deliver the design flow?
• Master intake gauge may also be referred as compound or _______?
• Centrifugal pumps are classified as which type of pump?
• Why is a gasket seal important at hose and appliance connections?
• Which factor does not influence friction loss?
• How should booster tank and vent openings levels be checked?
• During high-rise operations, what discharge pressure should the operator maintain?
• The most common priming inhibitor in drafting operations is an ______.
• Which statement is true regarding the side of the aerial that is short jacked?
• How do kinks and bends affect pressure along a hose lay?
• What is the required time window for pressure control valve to operate after a rise in pressure, per NFPA 1901?
• That part of the total available pressure not used to overcome friction or gravity while forcing water thru pipe, fittings, adaptors, and fire hose is known as ______.
• Which statement about Total Dynamic Head (TDH) is true?
• How should you perform a basic discharge valve check during an incident?
• What verification method is specified for booster tank and vent opening readings?
• What is the difference between a master stream and an attack line in terms of flow and purpose?
• What is a Siamese appliance and what is its purpose?
• In horizontal ventilation, to avoid venting heat and smoke, where should the vent be placed relative to the window?
• ALWAYS MAINTAIN A DISTANCE OF AT LEAST __ FEET BETWEEN THE AERIAL DEVICE AND ELECTRICAL LINES.
• During hydrant testing, which step helps confirm the system is delivering design flow?
• 2 common types of pressure control device are pressure relief valve and _______?
• Should functional tests be performed inside the station?
• Positive Displacement Pumps have two main types of pumps: Piston pump and which?
• If no water is being used for an extended time and the line must remain under pressure, the pump will ______?
• How can you verify that a hydrant is delivering the expected flow?
• Which statement best describes CFD pumps based on the given material?
• CFD pump foam should be used at what percent concentration for all flammable liquids fires?
• The device abbreviated as EPU is typically used to provide
• Rotary pump has two types of pumps: Rotary gear and which?
• Ball valve permits a full flow through the lines with a minimum of ___________?
• PSI stands for?
• When checking or adjusting a relief valve, which guideline is correct?
• Which safety practices are important during high-flow discharge operations?
• Removing all water from the fire pump when apparatus is stored in ________?
• The pump impeller generates RPM within which range?
• What is the purpose of the PTO in a hydraulic stabilization system?
• If the side of the aerial is short jacked, you should
• Which device is used to monitor and compare engine intake pressures on a fire pump system?
• Friction loss in a firefighting hydraulic system is the pressure drop caused by water flowing through hoses and pipes. It is influenced by which factors?
• Which factors influence nozzle selection for an attack line?
• Which action is prohibited when the aerial is on the short-jacked side?
• If a deck gun flow is not as expected, what checks would you perform?
• Why should suction lift be minimized during drafting?
• Complete the sentence: ______ operate the aerial on the side that is short jacked.
• What best describes a static water supply and its effect on firefighting operations?
• The most common type of valve is a _________?
• A _______ is used to relieve pressure after the discharge valve has been closed?
• 2 common types of pressure control device are pressure governor and _______?
• Pressure found in water distribution system during normal consumption demands is known as ______.
• What safety devices protect a pump and its discharge lines from overpressure?
• For high rise operation the driver/operator should pump and maintain a discharge pressure of
• Which of the following best describes the PTO’s role in hydraulic control?
• When troubleshooting a pump executing improperly, which checks are recommended?
• Class 1 systems are designed for which group?
• Cavitation is a condition where water is being discharged faster than it is entering the pump.
• If you double hose length from 100 ft to 200 ft, what happens to total friction loss?
• What is the most common pump mount?
• The system that provides power to a hydraulic pump to control stabilizers by directing hydraulic fluid through valves is the
• Which two devices are the two common types of pressure control devices?
• Which sequence correctly describes typical steps to prime a pump?
• Which statement is true about nozzle pressures for smooth bore vs fog nozzles?
• Which practice supports line discipline during high-flow discharge operations?
• The ___________ is measured from the highest rung at full elevation & extension to the ground.
• Which condition prompts removing all water from a fire pump before storage?
• Friction loss per 100 ft is used in calculations to estimate total friction loss by multiplying by hose length in hundreds of feet.
• When a pump is supplying multiple attack lines, any sudden flow change in one line will cause a pressure surge or drop in the others. This is called a?
• How do you estimate friction loss using hose charts?
• In a hydraulic context, a series configuration is associated with which parameter?
• How does elevation affect discharge pressure?
• The device that prevents backflow into the public water supply is called what?
• Two widely used pump types in the fire service include Centrifugal Pump and which other pump?
• In horizontal ventilation the tip should be placed on the ______ side and slightly ______ the window. This allows firefighters to vent a window without encountering heat, smoke, and falling glass.
• How is priming performed when drafting from a static source?
• What is relay pumping?
• NFPA 1901 requires that a pressure control valve to operate within ______ following a rise in pressure and permits no more than a _____ increase above it set pressure?
• What device consists of one-way check valves and is designed to keep water or contaminants from re-entering the public water supply?
• In a series arrangement of components, which parameter is primarily increased?
• Sprinkler / Standpipe systems should be supplied by using 3 inches or ___ hose.
• How should you check or adjust a relief valve on a pumper?
• If hydrant flow is lower than expected, what is an appropriate action?
• What does the acronym EPU represent in power systems?
• If the pump is cavitating, what is a likely cause?
• Which statement best describes the function of a bleeder valve?
• Why are check valves used in the discharge system?
• What is the term for the backward force experienced by firefighters when water exits a nozzle?
• Centrifugal pumps are classified as which type of pump?
• Which method can be used to verify hydrant flow?
• What is a smooth bore nozzle and when is it typically used?
• The aerial device should extend _____ feet beyond the roof's edge to allow safe entry, exit, and so it is easily spotted by firefighters on the roof.
• If the friction loss per 100 ft for 1.75 inch hose at 150 GPM is 15 psi, what is total friction loss for 300 ft?
• Stability of the aerial device can be improved by operating the aerial device in line with the truck's ____________.