CDC Mobile Water Supply Practice Test

These questions are part of the practice quiz. Start practicing

• How is pressure built inside a Rotary Vane pump?
• When inspecting windows and exterior lights, what condition should you look for?
• Which two braking systems are utilized in a Mobile Water Supply (MWS) apparatus?
• An MWS apparatus is resupplying 1,000 gpm to a pumper 4 feet below. What is the required pump discharge pressure (PDP) given 50' of 5-inch hose?
• What is the primary purpose of the hydrostatic test?
• What is the primary function of the three-stage cycle in a piston pump?
• Why is an in-line discharge important in water supply systems?
• Which of the following is a use of medium diameter hose?
• In fire water supply systems, what is the outcome of applying the Venturi effect?
• Why is it important to check the water level in the fuel filter?
• During the daily inspection of the pump primer, what is a primary component to check?
• What size water tanks are deemed most effective during stationary water supply operations?
• What term describes the pressure remaining in the system once water starts flowing from a hydrant?
• What is the maximum allowed height of the water surface above the centerline of the pump intake during fire apparatus service testing?
• What level should the power steering fluid be at?
• What three inspections should be performed weekly on an MWS apparatus?
• What is the term used to refer to the location of the pumper that is not at the fill site during water shuttle operations?
• What size water tanks are considered most efficient during water shuttle operations?
• Which size piping is typically used for gravity dumps in water supply systems?
• What is a critical aspect to consider when performing a pressure control test?
• At what minimum gauge pressure should each pump be hydrostatically tested according to standards?
• What is the approximate friction loss for 100 feet of 5" hose flowing at 500 gpm using the condensed Q method?
• What is a feature of the watertight areas in a Rotary Gear pump?
• What prevents the primary intake from vortexing with water?
• What feature do ball valves provide that is beneficial for flow?
• What should you specifically check for when inspecting the Pump Gearbox?
• What does friction loss refer to?
• How does a midship transfer drive operate?
• What type of valve might be used on large diameter lines?
• Which of the following can provide cavitation protection?
• How is a static water source defined in firefighting operations?
• By which method can PTO be engaged?
• Which NFPA standard requires three dump valves to be installed on all MWS apparatus?
• What should be the main focus when performing drafting operations?
• What type of pump utilizes two meshed gears?
• What does the term "gravity dumps" refer to in water supply practice?
• What is the approximate friction loss when water flows through 100 feet of a 4" hose at 500 gpm?
• What is meant by head pressure?
• Which size is the most common for large diameter hoses?
• What does the Manufacturer's Road Test measure?
• What does MWS stand for in the context of water supply operations?
• Which fire pump has a clearance issue between the impeller hub and housing?
• What does the presence of leaks in the hydraulic fluid indicate?
• Which fire pump is known for providing higher pressure outputs?
• What type of fire pump is best suited for low viscosity fluids?
• What feature prevents hard suction hoses from collapsing?
• Which test confirms that pump controls are functioning correctly?
• What is the purpose of the vacuum test in fire apparatus service testing?
• What do drain valves on the line side allow the operator to do?
• What is the process of drafting?
• True or False: Discharges can be used to cool the pump when no lines are flowing.
• What is an important aspect of maintaining peak performance in a fire pump?
• Which factor is NOT considered when selecting a drafting site?
• What should be checked for wear and proper tension in the engine compartment?
• What is a key step in the daily inspection of the Pump Drive Control?
• How is a properly calibrated handheld tachometer utilized in service testing?
• What condition may lead to a loss of control of an MWS apparatus when driving?
• Discharges are usually equipped with which type of valve?
• Why is it important to monitor the water level in the onboard tank?
• What is the typical diameter of tank-to-pump lines?
• How does a jet-assisted dump enhance the water discharge process?
• Where is the first pumper positioned during a water shuttle operation?
• What is one of the main functions of the second pumper in a water shuttle operation?
• How do the tank fill line connections affect operational efficiency?
• Which fire pump is not designed to be self-priming?
• What is a potential hazard that can occur when traveling at high speeds in an MWS vehicle?
• What should be inspected daily on the MWS apparatus?
• What should a firefighter consider when using static sources of water?
• How often should the Pump Gearbox and Packing Glands be inspected?
• During normal operations, what should the distribution system pressure ideally reflect?
• What is the common length for hard suction hoses?
• In the context of water supply, what does TPL stand for?
• What is considered the Normal Operating Pressure in a water distribution system?
• What is a key feature of most screw-on intake pressure relief valves?
• Where should the tank discharge be positioned on the MWS apparatus?
• Which pump type utilizes adjustable vanes for operation?
• Why is understanding friction loss important in fireground operations?
• Which type of pump has a self-adjusting part that lowers maintenance?
• What is the purpose of pump drains in cold climates?
• What should be done regarding pump panel instruments during daily inspections?
• What is the standard atmospheric pressure at sea level?
• What should you examine for cracks in the engine compartment?
• What type of pressure is created when air rushes into an area of lower pressure during the Venturi effect?
• What type of fire pump is commonly used for high-pressure fog nozzles?
• What should a driver check when approaching an underpass with low clearance?
• What should be checked for leaks in the engine compartment?
• How do ball valves typically function?
• If an MWS apparatus is equipped with a fire pump, it is referred to as a...
• For pumps with a capacity of less than 1,500 gpm, how long should the priming device take to create the necessary vacuum?
• What inspection should be conducted on the rapid dump system?
• What type of valve uses a spring-loaded pilot valve?
• Which of the following are three requirements for external fill connections on MWS apparatus?
• Which of the following is NOT one of the four pre-service tests normally done for a Mobile Water Supply (MWS) apparatus?
• How long should it take for pumps with a capacity of more than 1,500 gpm to create the necessary vacuum?
• Where must the pump drain be located?
• What is the required discharge rate of the tank based on its volume?
• A column of water 1"x1"x24" high exerts how much psi?
• What are the two primary types of rapid dump systems used on MWS apparatus?
• What effect does fluid velocity have when it passes through a restricted orifice?
• What defines a 'Venturi' in the context of fluid dynamics?
• What must be airtight and able to control both intake and discharge lines?
• Why are push-pull handles often preferred for valve operation?
• Using the hand method, what is the estimated friction loss for 100 feet of 2 1/2" hose at 300 gpm?
• A column of water 1"x1"x12" high exerts how much psi?
• Is the engine speed check the first test that should be performed during service testing?
• What should be inspected regarding any exposed wiring?
• What is the primary purpose of the priming device test?
• What principle does the Rotary Vane pump utilize?
• What device is typically driven by an electric motor?
• When large diameter hose is used, how many connections to the tank are necessary?
• What is the first step in the three-stage cycle of a piston positive displacement pump?
• Why is it important to check for fluid leaks in the engine compartment?
• What should be verified during the inspection of the auxiliary fire suppression system?
• What is the minimum pump capacity recommended for fill site pumpers?
• What is the purpose of a dump site in water shuttle operations?
• What is the main risk associated with liquid surge within the water tank of an MWS?
• What is the role of the in-line discharge in jet-assisted dumps?
• What is the large tank discharge commonly referred to as?
• What does inspecting drive belts help ensure?
• When inspecting the general condition of the MWS apparatus, which issues are you looking for?
• Which of the following is NOT considered a natural source of water?
• Which of the following is part of the routine checks for fire service apparatus?
• If a hose has a flow rate of 500 gpm with a friction loss of 4 psi, what will be the friction loss if the flow rate increases to 1,000 gpm?
• What is a requirement for the tank-to-pump line in an MWS apparatus?
• What is the purpose of the engine speed check in fire apparatus service testing?
• Which component is critical in the operation of jet-assisted dumps?
• What is the primary purpose of a pumping test in water supply operations?
• How does a Power Take Off (PTO) work?
• How can the engine speed be checked according to standard procedure?
• When inspecting hydraulic fluid levels, what else should be observed?
• What happens when the piston in a piston positive displacement pump moves back?
• What is the aim of inspecting the MWS apparatus?’
• What is static pressure?
• What is a key factor when ensuring the reliability of the pump primer?
• Which test requires a vacuum check according to NFPA 1901?
• What type of operations are used to manage large-scale fires requiring significant water resources?
• What is the most common type of valve found on lines?
• Why is understanding residual pressure important?
• How is water pressure defined?
• What can cause corrosion on battery terminals?
• What mechanism is used to reduce engine RPM in certain systems?
• What is a characteristic of large diameter hoses related to handling?
• Each department must select the size of the tank based on which factors?
• During the daily inspection of the auxiliary cooling system, what is the first action required?
• What is the purpose of performing both a cold and hot check on transmission fluid?
• What specific condition should be checked for on the body panel?
• How often should a fire pump service test be conducted?
• What is essential to confirm about the Pump Pressure Control Device during daily inspection?
• According to NFPA, how much water must an apparatus carry to be classified as a Mobile Water Supply (MWS) or Tender?
• What indicates a need for maintenance when inspecting the MWS apparatus?
• What is typically the minimum size for piping used in gravity dumps?
• What does static pressure represent in water supply operations?
• How does the Venturi effect influence water flow?
• What is the purpose of water shuttle operations?
• Are Pre-Service tests performed after an apparatus is placed into service?
• What is the minimum requirement for external tank fill intakes on a Mobile Water Supply (MWS) apparatus?
• What should be visually checked for on the MWS apparatus windows?
• Medium diameter hoses are generally defined as what sizes?
• During drafting operations, how many inches of water must be above a traditional strainer for a pump to operate at rated capacity?
• What is the function of a pitot tube in relation to flow pressure?
• What should be checked on battery terminals to ensure proper function?
• What is the definition of lift in the context of water supply?
• What does flow pressure refer to?
• What should be provided from the discharge side of the pump to facilitate filling?
• What does atmospheric pressure measure?
• What primary action occurs during the forward stroke of the piston in a positive displacement pump?
• What occurs when fluid is forced through a restricted orifice?
• What is the typical length range for large diameter hoses?
• What is a feature of most screw-on type valves?
• What is residual pressure in a water distribution system?
• Which test assesses the flow rate from the tank to the pump?
• Where is PTO most commonly used?
• Why is checking for fluid leaks important during an MWS inspection?
• What is a common feature of both gravity and jet-assisted dumps in water supply systems?
• How many types of performance tests should be conducted on all fire service apparatuses?
• What is indicated by a low level of power steering fluid?
• What is the primary function of jet-assisted dumps in fire apparatus?
• How does the Rotary Gear pump operate?
• What occurs if a pump is not properly vented during operation?
• What does a pressure control test ensure in a water pump system?
• What should you look for in the exhaust system?
• Most MWS apparatuses carry how many gallons of water on average?
• What does the pumping test evaluate in fire apparatus service testing?
• What test is performed to check the priming ability of a fire service pump?
• When assessing the fuel filter, what specific condition should be checked?
• What is one requirement for a pumper that is designated as a fill site pumper?
• Once the engine is shut off, what is the maximum allowable drop in system vacuum within 5 minutes?
• What is the purpose of using different hose sizes in water supply systems?
• Which of the following is NOT a source of water for firefighting?
• What would likely happen if a bleeder valve were absent?
• Which type of valve allows the driver/operator to relieve pressure from the hose?
• What indicates a successful engine speed check during testing?
• Large diameter hoses are generally defined as those between what sizes?
• What is essential to check regarding windshield washer fluid?
• What is an example of a pressurized water source for firefighting?
• True or False: Pressurized sources of water are under pressure before entering the fire pump.
• What common issue should be checked in the air system of an engine compartment?
• What is the minimum size for pump discharges?
• Which of the following is a characteristic of centrifugal pumps?
• How many pumpers does IFSTA recommend for an effective water shuttle operation?
• What is the criteria for checking engine oil within the engine compartment?
• Which of the following is included in the seven pump certification tests required by NFPA 1901?
• How many inches of mercury should the priming device and pump achieve?
• What should you check to determine if the air filter needs replacement?
• What are the two primary types of apparatuses required for effective water shuttle operation?
• How do you calculate head pressure?
• What is the correct coolant level in the overflow reservoir?
• Why is it important to check if the underpass height is marked?
• What are examples of man-made static water sources?
• Bleeder valves are used for what specific purpose?
• How do gravity dumps function to empty water from a tank?
• What can affect the outcomes of the pumping test?
• What unit is typically used to refer to water pressure?
• What is essential for maintaining pump performance when using an external water source?
• What sizes are hard suction hoses typically found in?
• Which of the following is NOT a type of fire pump?
• How are gate valves typically controlled?
• What purpose do medium diameter hoses serve during a fill site supply operation?
• What is the minimum required intake pressure of an apparatus being resupplied?
• Which formula is used to determine the pump discharge pressure (PDP) during a resupply operation?
• What should you check when looking at the circuit breakers or fuses?
• How are medium diameter hoses typically measured in length?