Liquid Fuels Volume 5

The "U" bend in the defuel line of the Panero Hydrant system pit is designed to keep the entire line from draining. This means that even if there is a decrease in pressure or a disruption in the flow, the "U" bend will hold a certain amount of fuel in the line, preventing it from completely emptying. This is important because it ensures that there is always fuel available in the line for immediate use, without the need for priming or refilling.

The correct answer is As-Built Drawing. When diagnosing a fuel delivery problem, the first step should be to consult the As-Built Drawing. This drawing provides detailed information about the layout and components of the fuel delivery system, allowing technicians to identify potential issues and locate the source of the problem. By referring to the As-Built Drawing, one can gain a better understanding of the system's design and make an informed diagnosis.

Fuel leakage from the vent port indicates leakage past the diaphragm on the pressure relief control valve. The vent port is designed to release excess pressure from the system, and if fuel is leaking from it, it suggests that the diaphragm is not functioning properly and allowing fuel to escape. This can lead to a loss of pressure control and potentially unsafe conditions.

After adjusting the high pressure CRL on the 51AF-4 rapid defuel valve, the last thing you should do to the CRL before leaving the area is to place the cap back on and seal it. This is important to ensure that the CRL is protected from any external elements that could potentially damage or contaminate it. By sealing the cap, it helps maintain the integrity of the CRL and ensures that it functions properly when it is needed again in the future.

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The solenoid is responsible for closing the defueling side of the main valve during refueling. A solenoid is an electromechanical device that uses an electrical current to generate a magnetic field, which in turn causes a mechanical action. In this case, the solenoid is activated to close the defueling side of the main valve, preventing any fuel from being removed during refueling.

The pressure reducing control on the 302AF fuel and defuel valve restricts the flow of fuel in the control tubing. Under normal conditions, it will not close.

Emergency stop switches at a truck loading header must be no closer than 25ft. This is because having the emergency stop switches at a distance of 25ft allows for a safe and accessible location in case of an emergency. It provides enough distance for the truck operator to quickly and easily reach the switch to stop the loading process if needed. Placing the switches closer than 25ft may hinder the operator's ability to reach them in a timely manner, potentially compromising safety.

The range of the low range DPT piped into the return venturi on a Type 3 is 0-100gpm. This means that the flow rate of the fluid passing through the venturi can vary from 0 gallons per minute (gpm) to a maximum of 100 gpm.

The pneumatic deadman is responsible for opening the 362AF-8 Hydrant Control valve for refueling of an aircraft. This device is designed to automatically shut off the flow of fuel if the operator becomes incapacitated or loses control. By using air pressure, the pneumatic deadman ensures that the valve remains open only when the operator is actively holding down the control lever. This safety feature prevents any accidental spills or overflows during the refueling process.

The 58AF-9-1 defuel/flush valve closes at a pressure of 80psi after the lead pump de-energizes.

A Type 3 system must be flushed when it is not used in 30 days. This is likely because after a certain period of inactivity, the system may accumulate bacteria or other contaminants that can affect its performance or pose a health risk. Flushing the system helps to remove any stagnant water and maintain its cleanliness and functionality.

The correct answer is 2 port, normally closed. This means that the solenoid used on the 90AF-8 refueling control valve has two ports and is normally closed. This type of solenoid allows the flow of fluid or gas through the valve when it is not energized or powered. When the solenoid is energized, it closes the valve and stops the flow of fluid or gas.

The CV Flow Control should be set at a rate of 20 seconds when adjusting the 302AF fuel defuel valve. This means that it will take 20 seconds for the valve to fully open or close, allowing for precise control and adjustment of the fuel flow.

To calculate the differential pressure required to adjust the CDHS-3 properly, you need to know the orifice plate size and the downstream pressure. The orifice plate size is important because it determines the flow restriction, and the downstream pressure is necessary to measure the pressure difference across the orifice plate. By knowing these two factors, you can calculate the differential pressure and make the necessary adjustments to the CDHS-3.

If the 51AF-4 rapid defuel valve opens during a refuel operation, it indicates that the Hytrol Check component has failed. The Hytrol Check is responsible for preventing fuel from flowing in the wrong direction, and its failure allows the valve to open unexpectedly during refueling.

The receiving strainer in a type 3 system must be cleaned at a differential pressure of 10 psi. This means that when the pressure difference between the upstream and downstream sides of the strainer reaches 10 psi, it is necessary to clean the strainer to ensure proper flow and prevent clogging.

Seamless stainless steel is the preferred type of control tubing used on the type 3 system. This is because stainless steel is highly resistant to corrosion, which is important for maintaining the integrity of the tubing in various environments. Additionally, the seamless construction of the tubing ensures a smooth and continuous flow of fluids or gases, minimizing the risk of leaks or blockages. Overall, seamless stainless steel tubing offers durability, reliability, and optimal performance for the type 3 system.

In a type 3 system, the tank outlet valves must be positioned with one valve open and one valve closed in order to refuel an aircraft. This configuration allows for a controlled flow of fuel into the aircraft's tanks while preventing any potential leaks or spills. By having one valve open, fuel can flow into the tank, while the closed valve acts as a safety measure to prevent fuel from escaping or overflowing. This ensures a safe and efficient refueling process.

To refuel the system after activating an E-STOP, the controls in the pump house need to be manually reset. This suggests that there is a specific process or sequence of actions that need to be performed in order to resume normal operation and allow for refueling. Simply pulling the E-STOP back to its normal position or turning the lead pump off and on may not be sufficient to reset the system. The fact that the system does not automatically reset further supports the need for manual intervention in the pump house.

The correct answer is 40-28G. This is the bypass valve's number.

The back pressure control valve opens to control the hydrant loop pressure at 100 psi to the furthest outlet. This means that when the pressure in the hydrant loop reaches 100 psi, the valve will open to release excess pressure and maintain it at that level.

The correct answer is "Manual tester on the float assembly." This is because the 413AF-5A high level shut off on an above ground tank can be tested by using a manual tester on the float assembly. This involves manually activating the shut off mechanism using the tester to ensure that it is functioning properly. The other options, such as using the test button on the control panel or filling the tank till the alarm sounds, do not specifically address the testing of the high level shut off mechanism.

The non-spark throttle bushing prevents leakage due to complete failure on the type 3 refuel pump mechanical seal. This is because the non-spark throttle bushing is designed to be spark-resistant, which reduces the risk of ignition and potential leakage.

The fueling pump and motor in the type 3 system must be aligned within .002. This means that there should be a maximum deviation of .002 units between the pump and motor alignment. This level of precision is necessary to ensure proper functioning and efficiency of the system. Any misalignment beyond this tolerance may result in issues such as decreased fuel flow, increased wear and tear, and potential damage to the components. Therefore, it is crucial to align the pump and motor within this specified range to maintain optimal performance.

The CRD on the 90AF-8 refueling control valve is set at 100psi. This means that the valve is designed to open and allow fuel to flow when the pressure in the system reaches 100 pounds per square inch.

The 352AF hydrant adapter controls the level at which fuel flow stops in defueling in order to prevent air from entering the line. This is important because air in the fuel line can cause disruptions in the flow and potentially lead to fuel surges or excess flow. By preventing air from entering the line, the hydrant adapter ensures a smooth and controlled defueling process.

The correct answer is 2129AF. This is because 2129AF is used as an overfill valve on the product recovery tank.

The correct answer is 58AF-9-1. This is the defuel/flush valve number.

During pantograph flush mode, the solenoid is energized to close the main valve. This means that the solenoid is supplied with electrical energy, which causes it to activate and close the valve. This action is necessary in order to prevent any water from flowing through the valve during the flush mode. By closing the main valve, the water supply is effectively shut off, allowing the flush mode to proceed without any water entering the system.

In a type 4 system, the primary method of receiving fuel is through barge and pipeline. This means that fuel is transported and delivered to the system using barges and pipelines. This method is commonly used for large-scale fuel distribution, especially in areas where access to fuel by trucks or aircraft may be limited or impractical. By utilizing barges and pipelines, the system can efficiently receive a significant amount of fuel, ensuring a steady supply for operations.

The purpose of the flow switch in the type 3 is to lock on the lead pump.

When the cover chamber pressure of the 90AF-8 refueling control valve is at least as great as the inlet pressure, the valve closes tightly. This means that the valve shuts off completely, preventing any flow of fluid through it. The high cover chamber pressure ensures a strong seal, preventing any leakage or backflow.

The correct answer is 3, pump control, pump selector, defuel pumps. This answer states that the Pritchard system control room has three electrical panels. These panels are used for pump control, pump selector, and defuel pumps. This suggests that the control room is responsible for monitoring and controlling the operation of pumps and fuel transfer processes.

Each 302AF fueling and defueling valve normally has only one hydrant outlet installed.

The purpose of the limit switch on the Type 4 product recovery tank high level shut off valve is to signal the microprocessor when the main valve is closed. This means that when the main valve is closed, the limit switch will send a signal to the microprocessor to indicate that the valve is in the closed position. This information is important for the microprocessor to accurately monitor and control the fuel level in the tank.

The pressure differential control on the Type 4 emergency shut off valve is adjusted at 7psi.

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The correct answer is 4,000 gallons because it is the only option provided that matches the question asking for the size of the product recovery tank.

The vacuum control switch is responsible for cutting off the defuel pump when the hydrant outlet closes. This switch detects the change in pressure when the hydrant outlet closes and triggers the cutoff mechanism for the defuel pump. It ensures that fuel flow is stopped when the hydrant outlet is closed, preventing any leaks or spills.

The correct answer is 41AF-2C. The question is asking for the combo rate of flow/fuel shut off valve's number. Among the given options, 41AF-2C is the only one that matches this criteria.

The correct answer is 362AF-8. This number refers to the hydrant refueling control valve. The "362AF" part of the number likely indicates the specific model or type of valve, while the "-8" at the end could signify a particular version or size of the valve. Without further context, it is difficult to determine the exact meaning of the numbers, but based on the options provided, 362AF-8 is the correct answer.

The orifice plate on the 302AF fueling and defueling valve is primarily used to create a differential pressure. This differential pressure is necessary to operate the CDHS-3.

The correct answer is 10psi above NOP. When adjusting the unloading CRL on the 302AF fuel defuel valve, it is set at 10psi above NOP (Normal Operating Pressure). This means that the pressure is increased by 10psi from the normal operating pressure in order to properly adjust the unloading CRL.

When an E-Stop (Emergency Stop) button is pressed or hit in a type 4 system, it triggers a safety mechanism that causes the resonating horn to sound. This is a precautionary measure to alert individuals in the vicinity that an emergency situation has occurred and immediate action is required. The resonating horn is activated specifically in response to the E-Stop being hit, ensuring that the alarm is distinct and easily recognizable in order to prompt a quick and appropriate response.

The 136AF-9B emergency shut off valve has two solenoids. When the solenoids energize, the valve free floats, meaning it is not held in any fixed position.

The correct answer is 413AF-5A. This is the high level shut off valve's number.

The ejector-strainer component aids in the opening of the 302AF fueling and defuel valve.

In a 2,400gpm Type 3 system, four DPT's are piped into the return venturi. The return venturi is a device used in hydronic systems to measure flow rates. In this particular system, four DPT's (Differential Pressure Transmitters) are used to measure the pressure difference across the venturi. This information is then used to calculate the flow rate of the system. Therefore, the correct answer is 4.

The flow rate range of the high range DPT's on the Type 4 return venturi's is 0-800gpm. This means that the DPT's can measure flow rates from 0 gallons per minute (gpm) up to 800 gpm.