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Fuels Vol. 3 Unit 4

Type 4 Hydrant System

QuestionAnswer
What type piping is used from bulk storage to the issue filter separators if the piping is 16 inches? 427 Internal, epoxy-coated carbon steel
What type piping is used from the issue filter separators, through the system loop, and back to the receiving loop if the piping is 12 inches? 427 Seamless stainless steel, Schedule 10S
What type piping is used from the issue filter separators, through the system loop, and back to the receiving loop if the piping is 4 inches? 427 Seamless stainless steel, Schedule 40 minimum
Why is stainless steel piping used in a Type IV system? 427 Because it is less susceptible to rust and ensures the fuel quality being delivered to the aircraft.
What type piping is used for the pressure relief and drain system in a Type IV system? 427 Epoxy-coated carbon steel, Schedule 40
What are the primary methods of receiving fuel into a Type IV system? 428 Pipelines or barges
What size and type receiving filter separators are used in the Type IV system? 428 Two 600-gpm, horizontal, API 1581 filter separators
What valve is used as the receiving filter separator control valve? 428 The 40–27G filter separator control valve (FSCV)
What valve is used as the high-level shut-off on a Type IV cut and cover tank? 429 129AF–3F
What component activates the high-level shut-off valve? Where is this component located on the Type IV cut and cover tank? 429 A CFM2 float control. It is located inside the tank at the required shut-off height
What is the purpose of the manual valve installed in the control tubing of the Type IV high-level shut-off valve? 429 To manually test the valve’s closing feature
How much control line pressure does it take to open the powertrol on a 129AF–3F? 429 5 psi
In what increments do the tank level indicators read on a Type IV tank? 429 feet and tenths of a foot
What happens when the fuel level reaches the high-level alarm setting on a Type IV underground tank? 429 The annunciator High Level Alarm window on the PCP flashes and a vibrating horn sounds
What happens when the fuel level reaches the high-high level alarm setting on a Type IV cut and cover tank? 429 A resonating horn, a light external to the control room, and the window on the PCP marked high-high level alarm are all activated
What type pump is used to transfer fuel on a Type IV product recovery tank? Where is the fuel transferred? 429 A 50-gpm, multi-stage, deep well turbine pump. It is transferred (returned) back through the receiving separators to the operating storage tanks
What type and capacity is the fueling pump used on a Type IV cut and cover tank? 430 Deep well turbine pumps rated at 600 gpm when driven at 3,600 rpm
What type and capacity is the fueling pump used on a Type IV cone roof with floating pan tank? 430 API 610, with a horizontal centrifugal, rated at 600 gpm when driven at 3,600 rpm
What is the primary purpose of the 41 AF–1A valve? 430 To lock the fueling pumps on after they have started.
What valve is used as the Type IV issuing filter separator control valve? 430 The 41AF–2C
What happens to the emergency shut-off valve when there is system power loss or an emergency shut-off switch is engaged? 430 It is directed to the main valve cover chamber, closing the valve
Where is the issue venturi located? 430 Downstream of the 136AF–9B valve
What is the issue venture rated? 430 At 1,200 gpm
How many pressure transmitters are found in the Type IV system? 430 There are two, one is a pressure indicating and the other is differential pressure
What is the primary purpose of the pressure indicating transmitters (PIT)? 430 To signal the microprocessor whenever system pressure drops below 60 psi, to call on the lead pump, and to call off the lead pump when system pressure reaches 175 psi.
What does the Type IV system use to connect to an aircraft for fueling? 431 A pantograph
What type swivel joints are used on a hoseless pantograph? 431 Stainless steel, single-plane, non-lubricated
What is the maximum electrical resistance throughout a hoseless pantograph? 431 1000 ohms
What size piping is used on a hose end pantograph? 431 3 inches in diameter, schedule-10 stainless steel
Why are lubricated swivel joints not allowed on a hose end pantograph? 431 there is no filter separator after the pantograph
What valve is used as the refueling control valve in a Type IV system? 431 362AF–7 valve
What happens to the 58AF–9–1 when the Type IV system is placed in “loop flushing mode?” 431 The valve opens wide and freefloats, which means the valve opens wide with any fuel flow
What happens to the 58AF–9–1’s solenoid “A” when the Type IV system is automatically started? 431 #14 It is energized.
What are the four positions on the selector switch of a Type IV system? 432 #6 Automatic, Off, Pantograph Flush, or Loop Flush mode operation
When do you get an “INVALID ENTRY” indication on the PCP address parameter? 432 #8 When entering a value into an address that is not within the range of that parameter
When does the 58AF–3 solenoid energize during the “loop flush” mode? 435 When the Auto-Off-Hand selector switch is placed in the “Hand” position. This starts the pump and energizes 58AF–3 PCV to close
How much fuel must be pumped to flush the loop of a Type IV system? 435 Twice the loop’s capacity
(427) What type piping is used on the main fuel line of a Type IV system for a 2-inch pipe? Epoxy-coated carbon steel, schedule 80
(427) What type piping is used downstream of the Type IV issue filter separator for a 6-inch pipe? seamless stainless steel, Schedule 40 minimum
(428) What size mesh screen is used in the receiving strainer of a Type IV system? 60-mesh
(429) What pounds per square inch backpressure does the pressure relief control maintain on the high level shut-off valve on a Type IV underground operating storage tank? 8 psi
(429) When does the high level light go out once the operator has acknowledged an activated alarm on a Type IV operating storage tank? fuel level is below the high-high level alarm setting
(430) What type fueling pumps are used in a Type IV cut and cover tank? Deep well turbine pumps, 600 gallons per minute (gpm)
(431) What type fuel dispensing hose is installed on a Type IV hose-end pantograph? 3-inch, API 1529, semi-hardwall
(431) When is the solenoid on the 58AF–3 pressure control valve on the Type IV system deenergized? When any pump is off
(431) What valve is used as the flush valve in a Type IV system? 136AF–5B flush valve
(431) When the flush valve on a Type IV system is placed in the pantograph flush mode, the solenoid is energized, main valve closed
(432) What do blue lines on the Type IV pump control panel graphic display represent? pump discharge and fueling loop
(432) What condition would cause a resonating horn to sound on a Type IV system? Emergency stop
(432) What switch, on the Type IV pump control panel, looks like a red mushroom? Emergency stop
(433) In a Type IV system, pressure indicating transmitters are located on the issue pipeline, downstream of the 136AF–9B emergency shut off (ESO)
(435) When a Type IV system is placed in the ‘loop flush’ mode, the solenoid on the 136AF–5B flush valve deenergizes to open main valve
(436) When a Type IV system is placed in the ‘pantograph flush’ mode, the solenoid on the 136AF–5B flush valve energized to close the main valve
Created by: Scottydick