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Fuels Vol. 2 Unit 1
Tank Construction, Tank Entry and Fuel Support Equipment
| Question | Answer |
|---|---|
| what determines the different types and quantities of fuel products required on location of an installation? (201) | mission |
| normal criteria fuel requirement and primary ports criteria supply (201) | 10 days and 15 days |
| who determines the type, size and quantity of fuel tank needed based on the mission reqs of a base? (201) | Defense Energy Support Center (DESC) |
| capacity of largest tank will not exceed 100k barrels w/o approval by (201) | HQ USAF |
| what tank type has variations such as floating roof, cone roof, and cone roof w/ floating pan (201) | vertical AST |
| tank external components are inspected how often (201) | monthly |
| double-wall tanks have what between the walls that must be checked manually or electrically for leaks (201) | interstitial space |
| manways will be at least what diameter on tanks (201) | 36 inches |
| the manual valve on inlet and outlet lines will be _. why? (201) | double block and bleed plug valve. insures positive blocking for the fuel during pipeline pressure testing and tank cleaning |
| current floor design for vertical ASTs and cut and cover tank floors are sloped __ percent from the outer edge towards a single center sump for positive drainage and self-cleaning action (201) | 5% |
| current floor designs for horizontal ASTs and USTs have a slope of __ percent and are coated with __ to prevent rust (201) | 1%, epoxy |
| vertical AST and cut and cover tanks have a single sump in the __. horizontal AST and UST sumps will be located at __ (201) | center, one end of the tank |
| water draw-off lines are usually what size and terminates inside the tank how far from the bottom of the sump (201) | 3/4", 1/2" |
| product recovery system tanks are horizontal tanks of what size (201) | 4000 gallons or less |
| product recovery systems should be inspected (201) | monthly |
| vertical AST PRTs includes a what size tank thats connected to the ASTs water draw-off line (201) | 55 or 100 gallon stainless steel |
| most common automatic tank gauging system used by the AF is a what that uses nitrogen filled bottles piped to liquid level sensors to gauge the fuel levels in any type or size tank (201) | electronic system |
| what metallic material is now the standard for grounds and bonds (201) | galvanized steel |
| all static grounds will have a resistance of less than how many ohms (201) | 10k |
| vent used for the cone roof storage tank is of what kind (201) | pressure/vacuum vent |
| what is also known as an automatic float gauge and consists of a gauge head & counter window, a float, two guide wires attached to roof and floor and a thin cable attached (201) | liquid level gauge |
| what is used to remove any fuel left in the tank after pumps have broken suction at the outlet line and is located at a lower level than the outlet line, but higher level than water draw-off (201) | fuel drain-off lines |
| what tank type is also known as the all-weather tank (202) | cone roof w/ floating pan |
| tank type is the most common design for bulk storage tanks and aboveground IOSTs for jet fuels in the continental US (CONUS) | cone roof w/ floating pan |
| a gauge well consists of an __ inch pipe connected to a __ __ that will be welded to the tank bottom and represents the official bottom of the tank | 8", datum plate |
| product withdraw outlet line is sized according to the size of the __ __ used and extends inside the tank, terminating in a vertical position __ inches above top of sump (202) | refueling pumps, 6" |
| the stripping line is a __ inch line used to pump the tnak douwn below the product withdrawal line termination level and terminates __ inches from the bottom of the sump | 3", 4" |
| what line used to fill the tank w/ fuel extends inside the tank 3 feet, turns 60*, flares out, and terminates at a max height of 4" from tank bottom | tank fill line |
| in what hemisphere does the fill line turn to the right to causes the fuel to rotate in a counterclockwise motion and why? (202) | northern hemisphere, use the coriolis force to aid cleaning the tank |
| in what hemisphere does the fill line turn to the left to cause the fuel to rotate in a clock-wise motion (202) | southern hemisphere |
| a hydraulically operated automatic valve controlled by the float assembly located on tank exterior (202) | high-level shutoff |
| what alarm is located just before the high-level shutoff level (202) | high-level alarm |
| alarm located above the high-level shutoff valve and is controlled electrically by a float assembly (202) | high-high level alarm |
| when fuel in the tank reaches what height from the bottom of the tank will the low-level shutoff alarm sound? (202) | 27" |
| what rests on the fuel and eliminates the vapor space above the fuel (202) | floating pan |
| floating pan low position during the day for issuing and receiving fuel is set at what. the high position when entry is required is set at what (202) | 3 feet, 6 feet |
| cables are strung form tank bottom to fixed cone roof to keep floating pan from turning (202) | two anti-rotation cables |
| two types of floating roofs (203) | double deck and pontoon roof |
| what modification has been made to floating roof tanks to cover the top to keep out rain, snow, and debris (203) | geodesic dome |
| floating roof tank type that is the most efficient b/c of insulating air space between the two decks that reduces vaporization of fuel (203) | double-deck floating roof |
| what construction on pontoon floating roofs allow the roof to remain afloat even if the center deck and any two of the pontoon compartments are punctured? (203) | bulkheads |
| horizontal USTs used to issue jet fuel usually __ to __ gallons. horiztonal USTs for ground products such as MOGAS and diesel will not exceed __ (204) | 25k to 50k, 25k |
| jet fuel USTs have what type of pump (204) | deep well turbine pumps |
| most deep well turbine pumps have a small bypass fuel line to bypass nearly __ percent of the fuel when the pump is running against a deadhead (204) | 2% |
| what type are the internal pump bowls used for even distribution of fuel through the pump column in deep well turbine pumps (204) | diffuser type |
| low-level controls shut off the fueling pump motor when the tank is how many inches from the bottom (204) | 13 inches |
| two types of low level control switches on a horizontal UST are (204) | mercury tube switch and cam-actuated mircoswitch |
| a horizontal UST will have a __ inch cleanout line installed at the lowest end of the tank usually next to one of the manways and will extend from the sump to __ inches above ground level (204) | 3/4", 12" |
| two most common high-level shutoff valves on a UST are the __ and __, with the first having a pan-type float assembly and the second using a ball-type float assembly (204) | 124AF, 129AF |
| the 129AF uses a what to assist in venting the cover chamber when the valve opens (204) | ejector |
| tanks w/o an inlet filter separator, micronic filter, or internal coating are inspected every _ years (205) | 4 |
| tanks w/ a filter separator or micronic filter on the inlet OR internal coating are inspected every _ years (205) | 6 |
| tank w/ a filter separator or micronic filer on the inlet AND internal coating are inspected every _ years (205) | 8 |
| API 653 "out of service" inspection on aboveground tanks are inspected every _ years (205) | 10 |
| tanks used for storage of above ground products such as MOGAS and diesel should be inspected for leaks, corrosion, etc. and/or cleaned by the __ __ office. exterior of aboveground tanks inspected __ (205) | fuels management office, monthly |
| an uneven settlement of __ to _ inches is usually enough to cause the tank shell to go out of round. this causes a floating roof tank top to become _ in shape (205) | 3" to 5", elliptical (oval) |
| should a roof "hang up" when emptying a tank, immediately start doing what (205) | pumping fuel back into the tank |
| identification of petroleum products in each storage tank and piping system is provided by MIL-STD _? (205) | 161G |
| _ band for AVGAS, _ bands for MOGAS, _ bands for jet fuel, and _ bands for diesel (205) | 1, 2, 3, 4 |
| a dike is built to provide the volumetric capacity and height to hold __ percent of tank maximum fuel capacity (205) | 110% |
| the purpose of what valve in the event of a cone roof tank fire, will spring-load close the valve, isolating the fuel in the pipeline. at what temp will it melt? (206) | fuse-link valve. 160*F |
| the pressure relief valve is adjusted to open when pressure in the pipeline caused by thermal expansion increases to _ percent above system deadhead pressure (206) | 10% |
| turn the adjusting screw on the pressure relief valve __ to increase the pressure and __ to decrease it (206) | clockwise, counterclockwise |
| the adjustment of a liquid level gauge is done at the __ (206) | float |
| the DOWN position of the roof supports are lowered to approx _ feet above the floor and the UP position raises the supports approx _ feet from the floor (207) | 6 feet (cleaning), 3 feet (tank filling) |
| the number of roof supports necessary depends on the __ of the roof (207) | diameter |
| floating roof storage tanks use two types of vents (207) | automatic bleeder vent and a rim vent |
| what floating roof storage tank vent relieves slugs of air or vapor entering the tank through the fill line (207) | rim vent |
| what floating roof storage tank vent allow the tank to breath as long as it is empty and has UP and DOWN positions (207) | automatic bleeder vent |
| how often do you check the roof drain system for water accumulation (207) | daily |
| what are on each side of the swing joint that keeps fuel from entering the drain line in a roof drain system of a floating roof storage tank (207) | flange gaskets and asbestos ring packing |
| if a swing joint is leaking, adjust the (207) | packing |
| in extremely cold climates, fill the roof drain lines with an approved (207) | antifreeze (half and half water) |
| a fabric roof seal on a floating roof tank consists of a metallic sealing w/ vertical flexures spaced about _ inches apart (207) | 22" |
| inspect and clean the fabric seal how often (207) | monthly |
| once the prescribed shut-off height is reached for the high-level valve does not close, trouble shoot the _ and the _/_ assembly | valve, float chamber/rotary disc assembly |
| inspect the liquidometer of an underground tank for condition, accuracy and function how often | annually |
| before the _ _ of a liquidometer is unthreaded, you must first electrically isolate the low-level control and disconnect the linkage from the liquidometer to the low-level control | gauge head |
| normally what type storage tank is used for storing 25k gallons of MOGAS (201) | vertical AST |
| type of aboveground tank primarily used to store jet fuel and fuels w/ flash points less than 100*F (202) | cone roof w/ floating pan |
| whats purpose is to allow you to use the permanently installed refueling pump to pump the tank down to the stripping line termination level (202) | 3 inch stripping line tee |
| what prevents solid particles of sludge from entering the pump and damaging moving parts inside the pump column of a deepwell turbine pump (204) | wire screen |
| whats purpose is to keep the motor and pump from running in reverse (204) | motor's built-in ratchet assembly |
| whats purpose on a UST is to indicate the amount of liquid in the tank in either gallons or one quarter tank increments ranging from empty to full (204) | liquidometer |
| how often do you check the interstitial space of a UST (205) | monthly |
| how often do you check the bottom of an aboveground vertical tank for leaks (205) | monthly |
| type valve used as a dike drain valve (205) | lock-type gate valve |
| the amount of pressure or vacuum it takes to lift the what is determined by (206) | by the weight of each pallet |
| when using a tape and bob to gauge a tank, the tape must remain in contact with what to prevent sparks (206) | top edge of the gauge pipe |
| it takes two people to raise a roof support b/c one person has to position the _ and another has to insert the _ _. (207) | support, guide pin |
| for ease of operation, coat the roof support legs and guide pins in _. (207) | grease |
| during freezing weather, watch the rim vent on a floating roof tank closely to prevent it from (207) | freezing closed |
| before you can repair joints of the roof drain line, you must first (207) | drain and vapor-free the tank |
| during freezing weather, to protect the fabric seal, you must do what (207) | keep it free of ice |
| tank cleaning process steps can be found in (209) | UFC 3-460-03 |
| notification to MAJCOM fuels engineer must be given a minimum of how many days before the proposed entry date (209) | 15 workdays |
| the base ground safety (SEG), base fire dept (CEF), and bioenvironmental engineer (BEE) comprise the (209) | Confined Space Program Team (CSPT) |
| during an in-house cleaning who is directly responsible (209) | tank entry supervisor (TES) |
| the MAJCOM rep should immediately notify who if there is any safety related violations or noncompliance on the part of the contractor (209) | contracting officer |
| toxic hazards to which cleaning personnel are exposed to are (210) | leaded compounds, benzene, and oxygen deficiency |
| what are required throughout the tank cleaning process due to unpredictable air contamination? (210) | supplied air respirator (SAR) |
| no one will initially enter a fuel tank until it has been properly ventilated as close _ percent but no higher than _ percent of the LEL (210) | 0%, 10% |
| vapor readings inside of a tank should be taken continuously and recorded every _ minutes while workers are in the tank (210) | 15 minutes |
| before authorization of tank entry, oxygen levels must be between (210) | 19.5% and 23.5% |
| what is the standard to reference for confined spaces? (210) | AFOSH Std 91-25 |
| what are the only type respirators used by the AF for petroleum tank-cleaning operations? (211) | "C" |
| a communication system must be provided and used when cleaning a UST larger than __ gallons, or when manhole accesses are deeper than __ feet from ground level (211) | 50k, 10 feet |
| the length of hose or air line for each mask must not exceed the NIOSH approved length of __ feet unless approved by the BEE (211) | 300 feet |
| inspect each safety harness before using it to make sure the maximum usage does NOT exceed _ years from the date on the harness. inspect safety harnesses how often (211) | 10 years, every 6 months |
| never permit a vertical fall of more than _ feet or contact w/ the lower level (211) | 6 feet |
| a tie-off point must have a capacity of how many pounds (211) | 5k pounds |
| what is the tank inspection summary form number (212) | AF Form 172 |
| when returning a clean tank to service, use new _ when re-attaching pipeline components and manway covers (212) | gaskets |
| who is responsible for removing fuel from the tank to the lowest point possible through the installed pumps (209) | base fuels management office (POL) |
| what is used to determine the vapor concentration in a given area? (210) | combustible gas or vapor indicator |
| which fuels contain benzene? (210) | all fuels contain benzene |
| where is all the equipment used in a tank cleaning operation located? (210) | upwind |
| what items are forbidden and must not be carried by cleaning personnel (210) | matches and lighters |
| what are the primary means of rescue during a tank cleaning? (210) | self-rescue, fire dept, and organizational rescue team |
| how many members of the rescue team should be CPR certified? (210) | all members of rescue team |
| who is responsible for ensuring that PPE is provided, used and maintained? (211) | supervisor |
| electrical equipment and conductors within 50 ft of fuel pipes of tanks are of what type (211) | Class I, Div. 1, Group D w/ max temp ratings of 419*F |
| what is the service life of life-lines? (211) | 5 years |
| weather condition causes immediate halt of tank cleaning operations (212) | lightning within 5 miles |
| during initial cleaning, at what vapor reading must you temporarily suspend washing down the tank? (212) | 20 percent LEL or higher |
| after sludge has been removed, what part of the tank should be scraped to remove rust and scale? (212) | bottom of the tank and 3 feet up the sides |
| who will direct the disposal of fuel-water-sludge mixture from a tank cleaning? (212) | BCE environmental coordinator |
| in a floating roof tank, where would you store the drain line? (213) | inside the tank |
| what size lumber would you use to support a floating roof to prevent damage? (213) | 4 x 4 |
| a positive mechanical means of ventilation should be provided for all below-grade pits w/ installed pumps or pits of more than _ feet deep (214) | 6 feet |
| the operating and storage temperature for the PGM-50 MultiRAE vapor indicator is __ to __ degrees C (214) | -20 to 45 |
| what air compressor is most commonly used in WFM shops (215) | MC-7 air compressor |
| how many parts per million of fuel vapors in air can produce a stage of excitement when inhaled? (214) | 500 ppm |
| what 3 locations will you use a vapor indicator? (214) | in and around fuel separators, inside pits and tanks |
| where may a vapor indicator be recharged? (214) | in a non-hazardous area |
| what is the voltage the MultiRAE PGM-50 vapor indicator will display when you have approximately 15 minutes before the unit shuts off? (214) | 4.4 volts |
| a "bump test" for the MultiRAE PGM-50 vapor indicator will do what to the unit? (214) | verify the calibration of the indicator |
| what T.O. covers operation and maintenance of the MC-7 air compressor? (215) | TO 34Y1-244-1 |
| what fluid levels do you check before moving the MC-7 air compressor? (215) | coolant, fuel, oil and battery levels |
| what is the purpose of the restriction indicator? (215) | to indicate when the air cleaner element is dirty |
| what position are the side doors of the MC-7 air compressor while the compressor is running? (215) | down |
| what does the NFPA require all electrical equipment and wiring in hazardous locations? (216) | must be totally enclosed and explosion-proof |
| dimensions of the Class I, Div II hazardous area for an automotive service station island? (216) | 18" high and 20' out from the dispenser |
| differences between explosion-proof and vapor-proof fittings? (216) | vapor-proof fitting add gaskets and seals to all mating surfaces, plugs, and switch arms |
| what is co-located near a fuels facility in case there is a power outage? (216) | an emergency generator |
| how would you ground components in a pumphouse for underground tanks? (216) | directly to the underground tank w/ a ground cable |
Created by:
Scottydick
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