Aviation Boatswain’s Mate – Fuels (ABF) Practice Exam

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• What is the motor speed range for the centrifuge used in the JP-5 purifier?
• What is the maximum differential pressure across the service fuel filter?
• To reduce static electricity prior to entering a fuel tank what component is provided inside a fuel system?
• What position should the truck be in during filling operations?
• The NAVIFLASH method uses which action to ignite vapors during flashpoint testing?
• How many intermediate disks are in the 300 gpm purifier?
• Continuity wire length should exceed the hose length by which of the following?
• Approximately how many quarts does the oil sump hold?
• What is the major difference between hoses used at shore facilities and afloat units?
• What is the range of beats per minute for the JP-5 purifier operation?
• What is the oil sump capacity?
• How much hose does JP-5 hose reel hold?
• For reducing static charges, the fuel must be in contact with the metal walls of the relaxation device for at least how many seconds?
• The pressure refueling nozzle used for bottom loading a mobile refueler is designed to receive the product at what minimum gallons per minute?
• Which device ensures the fuel remains free of water and contaminants by filtration and separation at shore operations?
• What is an aircraft direct refueling system primarily designed for?
• What are the two types of stripping systems in JP-5 below decks?
• The NAVIFLASH method assesses flashpoint by igniting vapors with an electric spark and measuring what?
• What does commingling refer to?
• Which component is responsible for reducing static charges by allowing contact with metal during fueling?
• How far does the service tank suction tailpipe extend from the bottom of the tank?
• The inside diameter ranges from 200 millimeters to 250 millimeters in increments of what?
• What effect do surfactants have on water and fuel?
• Which situation would require hose replacement during hose inspection?
• How far does the recirculating line extend off the bottom of the JP-5 tank?
• For a sediment test with CCFD, how much fuel is used?
• To be acceptable to aircraft what must JP-5 look like?
• The bottom of the wing tank is at what part of the ship?
• The bowl in the purifier must not exceed how much wetcake?
• Which connection links the main-side valve to the tank-side valve in a manifold?
• What is the mesh size used in strainers for overwing refueling nozzles?
• Which statement best describes the major hose difference between shore facilities and afloat units?
• In JP-5, what does sediment most commonly look like?
• Which component functions as a pressure-reducing valve to set a safe discharge pressure in the fuel system?
• How long does the CCFD take to warm up?
• Why are wearing rings used?
• In a direct refueling system, which statement about eductors is true?
• Flashpoint is defined as the lowest temperature at which fuel vaporizes enough to form a combustible vapor.
• What is the GPM rated capacity of the centrifugal pump?
• How far should mobile refueling trucks be parked from inhabited buildings?
• Tank filling connections are regulated to introduce fuel into the tanks at a velocity of no more than how many feet per second of product?
• The gravity fueling nozzle used for aux on the flight deck is which designation?
• Which device is used to test JP-5 for flashpoint and includes an ignition spark and pressure sensing?
• Which two manufacturers are most common for JP-5 service pumps?
• What is the description of the automatic Pensky-Martin?
• What is the main purpose of wearing rings in the pump system?
• Within the CCFD, how often must the standard cards be replaced?
• When should you use an eductor on a direct refueling system?
• What is the purpose of the fill and transfer system?
• What must JP-5 look like to be acceptable to aircraft?
• What equipment on shore refueling stations provides a continuous check on the cleannes of the fuel passing through the filter/ separators?
• Volatility is described as being associated with which two fuel properties?
• In naval aviation, which role is denoted by the acronym ACHO?
• What is the working pressure of the positive displacement refuel pump in fueling stations?
• What is the minimum gallons per minute the pressure nozzle for bottom loading can deliver?
• Who is the last person to sign off a defeuling operation in the flight deck or hangar bay?
• The cla-val functions as a pressure-reducing valve to maintain a constant discharge pressure not to exceed what psi?
• On a manifold, what connects the main-side valve to the tank-side valve?
• What is the freezing point?
• JP-5 must not contain more than how much free water and mg/L?
• Before fuel can be pumped into any tank in a nest of storage tanks, what condition must be met?
• The most commonly used rotary vane pump in JP-5 below deck systems is described as which type of pump?
• The high level alarm tank system is set at what percent of tank capacity?
• What are the two categories of fuel storage tanks used at ashore refueling activities?
• How many quadrants is the service system isolated into?
• Which fuel has a freezepoint of -53 degrees?
• What is regarded as coarse sediment?
• What is the NATO designation for JP-5?
• Which gauge reads the pressure differential across the service filter?
• What is the rated pressure for a rotary vane stripping pump?
• Mobile refueler tanks are made from which materials?
• Which device on mobile refuelers provides a secondary fail-safe that closes an internal valve when the fuel level is too high?
• In the described pump system, how many wear rings are rotating?
• The top of the wing tank is at what level on the ship?
• What is the name of the gravity fueling nozzle used for aux on the flight deck?
• A nylon collar acts as a wearing ring for which component?
• How far does the hand operated stripping tailpipe extend off the ground?
• Where are the two stationary wear rings located?
• Which containment feature is the recommended default for refueler parking areas?
• In a rotary vane pump, which component houses the ball bearings and mechanical seals?
• What type of gauge is normally installed on the service filter to read pressure changes from inlet and outlet chambers?
• The CCFD determines solid contamination by using which principle?
• In the described pump system, how many wear rings are stationary?
• In four replaceable wear rings, where are the two rotating located?
• What is the flashpoint of JP-5?
• Which of the following is NOT one of the three pumping systems below decks in JP-5?
• What is the most commonly used rotary vane pump in JP-5 below deck systems?
• What is the primary device used at shore installations to keep aviation fuels clean and dry?
• What are service tanks used for?
• Which statement best defines coarse sediment in JP-5?
• What is the maximum allowable time for product circulation on a returner that is more than one half full?
• What is the pore size of the milipore filters used in CCFD?
• How often should you inspect bonding and grounding cables, clamps, and plugs?
• A nylon collar acts as a wearing ring for which component?
• Which component uses more ball bearings, the collar or the bottom of the body?
• Which of the following is the second specification listed for the Aurora JP-5 service pump?
• Which statement best describes the role of the milipore filters in CCFD testing?
• If the delivery pressure is 60 psi, what is the fuel valve relief setting?
• What is the minimum distance that a refueler truck should be positioned from an aircraft?
• Which statement about the stripping systems is correct?
• Which feature on mobile refuelers acts as a secondary safeguard by closing an internal valve when fuel level is too high?
• What is the preferred method of fuel containment used in refueler parking areas?
• To safely conduct refueling operations, what minimum number of gallons of product should a refueler/defueler truck tank contain?
• During inspection of fuel hoses, which condition is a definite replacement trigger?
• While inspecting fuel hoses what indication is cause for hose replacement?
• The JP-5 hose reel holds 150 feet of hose. If you use 75 feet, how many feet remain on the reel?
• In the CLA-Val the fuel valve pressure relief control valve psi will be set how much higher than the delivery pressure?
• For fuel containment in refueler parking areas, which system is specified as the preferred containment?
• What type of flow meters is installed on truck fill stands?
• In CCFD testing, what is the primary measurement used to determine contamination level?
• What is the pressure drop limit, in psi, on the service fuel filter?
• What grade is the oil in the sump?
• What is the bowl speed of the JP-5 300 GPM Centrifugal Purifier?
• How far does the motor driven extending tailpipe extend off the ground?
• What type of tank is normally filled first during a refueling operation?
• The spindle assembly is supported by how many sets of ball bearings?
• Which fuel has a flashpoint of 100 degrees?
• Which containment feature is preferred for fuel spills in refueler parking areas?
• Which purifier has more intermediate disks, the 300 gpm purifier or the 200 gpm purifier?
• How many intermediate disks are in the 200 gpm purifier?
• What device ensures the disk is centered into the base of the valve body in a manifold?
• Which fuel has NATO designation F-44?
• During testing of returner circulation, which time value is the maximum allowed if the container is more than half full?
• What is used to insulate the swing amphonel stud that also prevents it from completely grounding out?
• If the delivery pressure is 60 psi, what is the defuel valve relief setting?
• In the NAVIFLASH method, what component senses pressure buildup to indicate flashpoint?
• Which material combination is correct for mobile refueler tanks?
• Inside diameter range of 200 to 250 millimeters uses increments of what?
• Tank filling connections are regulated to introduce fuel into tanks at a maximum velocity of how many feet per second?
• What is the NATO designation for JP-8?
• Which statement correctly identifies the two stripping system types used in JP-5 below decks?
• Refueling operations are terminated when lighting is observed at what distance from ashore installations?
• Service system is typically designed to be isolated into how many quadrants?
• What does CCFD stand for?
• What size mesh are the screens used in strainers for overwing refueling nozzles?
• Microbiological growth in JP-5 is described as which of the following?
• Which of the following is a correct listing of the three separate pumping systems in JP-5 below decks?
• What is the minimum size of a halon fire extinguisher used at the fueling point of a direct refueling system?
• For a water test with CCFD, how much fuel is used?
• Why are two milipore filters used in a CCFD test?
• How much longer should you cut the continuity wire than the hose it self?
• Which of the following best describes the sediment commonly found in JP-5?
• In the CLA-Val the defuel valves pressure relief control valve will be set how many psi higher than the delivery pressure?
• Transfer main branch headers connect the transfer main to which component?
• What property describes a liquid's resistance to flow?
• Which term describes the mixing of two fuels?
• In all direct refueling system pantographs, what type of hose coupling is used?
• Which component on the LIMITORQUE valve operator operates the OPEN and CLOSE position indicator lights?
• In the pump assembly, how many replaceable wearing rings are there and how are they arranged?
• In refueler parking areas, which feature is used to contain spills under the parked trucks?
• What is the effective range of spring tension that the pressure relief control valves can be adjusted?
• What is the rated pressure for a rotary vane pump for transferring?
• What is the reclamation system used for?
• What is the minimum fueling truck tank capacity for safe fueling operations?
• The collar is attached by how many ball bearings?
• A control device is built-in on all refueling systems ashore and incorporated on all modern aircraft designs to limit surge pressure to what prescribed pressure?
• What is the freezepoint value for JP-8?
• What type of tank located between voids is an integral part of the ship's underwater protective system?
• Which statement about safety distances for mobile refuelers is true?
• The centrifugal pump impeller is centered and secured in the pump casing by which devices?
• What are storage tanks used for?
• A total of how many sets of ball bearings support the spindle assembly?
• Which describes the Aurora JP-5 service pump's configuration?
• Specific gravity is defined as the ratio of what?
• Tank cleaning maintenance is authorized by who?
• Which tank alarm system is set at 98% and has a mechanically actuated valve to shut off fuel flow?
• What is the rated capacity for pre-filters?
• What disk provides a rotating casing for the centripetal pump?
• Which statement best indicates the required action if a fuel hose shows damage during inspection?
• What is the detection range of the CCFD for solid contamination?
• Water-in-fuel emulsions appear as which of the following?
• The bottom of the body is attached to the inlet by how many ball bearings?
• What is the freeze point of JP-5?
• For a returner that is more than half full, what is the maximum circulation time allowed?
• In purifier operation, the purifier bowl's wetcake limit is specified as a weight. Which weight is the limit?
• During hose inspection, which condition mandates hose replacement?
• The maximum spring tension adjustment for the pressure relief control valves is?
• Specific gravity determinations are correlated to a reference temperature of which temperature?
• Which component ensures alignment of the valve disk within the manifold base?