Embraer 190 - Fuel
FUEL SYSTEM QUIESTIONS MADE FROM AOM VOL. 2GOOD LUCK!SANTIAGO STOCKER.
Questions and Answers
- 1.
Fuel is stored in ____ integral wing tanks, interconnected by a crossfeed valve.
- A.
Two
- B.
Three
Correct Answer
A. TwoExplanation
Fuel is stored in two integral wing tanks, which are interconnected by a crossfeed valve. This means that the fuel is distributed between these two tanks and can be transferred from one tank to another using the crossfeed valve.Rate this question:
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- 2.
The _____________ (inboard section) keeps the fuel pumps submerged, ensuring a constant fuel flow to the respective engine.
- A.
Collector tank
- B.
Surge tank
Correct Answer
A. Collector tankExplanation
The collector tank keeps the fuel pumps submerged, ensuring a constant fuel flow to the respective engine. This tank collects and stores fuel from various sources, such as fuel tanks, and then distributes it to the engines as needed. By keeping the fuel pumps submerged, it helps prevent any interruptions or fluctuations in fuel flow, ensuring a steady supply of fuel to the engine.Rate this question:
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- 3.
The _____________ is designed to collect any fuel that may enter the vent system during wing down and uncoordinated maneuvers.
- A.
Collector tank
- B.
Surge tank
Correct Answer
B. Surge tankExplanation
A surge tank is designed to collect any fuel that may enter the vent system during wing down and uncoordinated maneuvers. This helps prevent fuel from entering the engine and causing damage. A collector tank, on the other hand, is not specifically designed for this purpose and may not effectively collect fuel during such maneuvers. Therefore, a surge tank is the correct answer.Rate this question:
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- 4.
A ____________ is designed to ensure that the differential pressure between the tank and surrounding environment remains within structural limits and to prevent fuel spillage during flight maneuvers and hard breaking.
- A.
Low pressure pump
- B.
Vent system
Correct Answer
B. Vent systemExplanation
A vent system is designed to ensure that the differential pressure between the tank and surrounding environment remains within structural limits and to prevent fuel spillage during flight maneuvers and hard braking. This system allows for the release of excess pressure and prevents the tank from becoming over-pressurized, which could lead to structural damage or fuel leakage.Rate this question:
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- 5.
_____ water drain valve collect water by gravity in each tank.
- A.
One
- B.
Two
Correct Answer
A. OneExplanation
The correct answer is "One." This suggests that there is only one water drain valve in each tank, and it collects water by gravity.Rate this question:
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- 6.
Electrical sensors measure the fuel quantity in each tank. ____ additional independent fuel low-level sensor installed in each tank detects the fuel low-level condition.
- A.
Two
- B.
One
Correct Answer
B. OneExplanation
The correct answer is "One." This suggests that there is only one additional independent fuel low-level sensor installed in each tank to detect the fuel low-level condition.Rate this question:
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- 7.
On ground, ______ magnetic level indicators (dripsticks) mounted under each wing, provide an alternate means for fuel measuring.
- A.
Three
- B.
Six
Correct Answer
A. ThreeExplanation
Three magnetic level indicators (dripsticks) mounted under each wing provide an alternate means for fuel measuring.Rate this question:
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- 8.
The maximum fuel quantities indicated to the flight crew are:
- A.
6550 each tank, 13100 total.
- B.
8550 each tank, 17100 total.
Correct Answer
A. 6550 each tank, 13100 total.Explanation
The maximum fuel quantities indicated to the flight crew are 6550 each tank and 13100 total. This means that each tank can hold a maximum of 6550 units of fuel, and the total fuel capacity of both tanks combined is 13100 units.Rate this question:
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- 9.
The FUEL USED indication __________________ reset by the FMS upon the first engine start.
- A.
Must be manually
- B.
Is automatically
Correct Answer
B. Is automaticallyExplanation
The FUEL USED indication is automatically reset by the FMS upon the first engine start.Rate this question:
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- 10.
Right wing fuel tank contains the following pumps: (Check right tank pumps only)
- A.
Ejector fuel pump.
- B.
Wing AC electric fuel pump.
- C.
Three scavenge ejector pumps.
- D.
DC electric fuel pump.
Correct Answer(s)
A. Ejector fuel pump.
B. Wing AC electric fuel pump.
C. Three scavenge ejector pumps.
D. DC electric fuel pump.Explanation
The right-wing fuel tank contains several pumps: the ejector fuel pump, the wing AC electric fuel pump, three scavenge ejector pumps, and the DC electric fuel pump. These pumps are responsible for various functions such as transferring fuel, maintaining pressure, and scavenging excess fuel. Therefore, all of these pumps are present in the right-wing fuel tank.Rate this question:
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- 11.
Left wing fuel tank contains the following pumps: (Check left tank pumps only)
- A.
Ejector fuel pump.
- B.
Wing AC electric fuel pump.
- C.
Three scavenge ejector pumps.
- D.
DC electric fuel pump.
Correct Answer(s)
A. Ejector fuel pump.
B. Wing AC electric fuel pump.
C. Three scavenge ejector pumps.Explanation
The left wing fuel tank contains several pumps: the ejector fuel pump, the wing AC electric fuel pump, and three scavenge ejector pumps. These pumps are responsible for ensuring a constant flow of fuel to the engine and maintaining proper fuel pressure. The ejector fuel pump uses the Venturi effect to draw fuel from the tank, while the wing AC electric fuel pump is powered by the aircraft's electrical system. The three scavenge ejector pumps help to remove any excess fuel or vapors from the tank. Together, these pumps ensure the efficient and reliable operation of the aircraft's fuel system.Rate this question:
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- 12.
The primary wing fuel pump is a ...
- A.
Venturi ejector pump (jet pump)
- B.
Wing AC electric fuel pump.
- C.
DC electric fuel pump
Correct Answer
A. Venturi ejector pump (jet pump)Explanation
The primary wing fuel pump is a venturi ejector pump, also known as a jet pump. This type of pump uses the Venturi effect to create a pressure difference, which draws fuel from the tank and ejects it into the engine. It does not rely on electricity and is commonly used in aircraft to provide fuel flow in low-pressure systems.Rate this question:
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- 13.
The wing tanks AC electric fuel pump supplies fuel to the following components:
- A.
Onside engine during engine starts and cross side engine during crossfeed operations.
- B.
Onside engine during engine starts, cross side engine during crossfeed operations and APU, when engine is not running.
Correct Answer
B. Onside engine during engine starts, cross side engine during crossfeed operations and APU, when engine is not running.Explanation
The correct answer is that the wing tanks AC electric fuel pump supplies fuel to the onside engine during engine starts, the cross side engine during crossfeed operations, and the APU when the engine is not running.Rate this question:
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- 14.
The wing tanks AC electric fuel pump is also a backup pump in the event of ...
- A.
Ejector pump failure.
- B.
DC electric fuel pump.
Correct Answer
A. Ejector pump failure.Explanation
The wing tanks AC electric fuel pump serves as a backup pump in the event of ejector pump failure. This means that if the ejector pump, which is responsible for drawing fuel from the tanks, fails to operate properly, the AC electric fuel pump can take over and ensure a continuous fuel supply to the aircraft's engines.Rate this question:
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- 15.
The left wing AC electric fuel pump (AC PUMP 1) is powered by ...
- A.
AC ESS BUS.
- B.
AC BUS 1.
Correct Answer
B. AC BUS 1.Explanation
The left wing AC electric fuel pump (AC PUMP 1) is powered by AC BUS 1.Rate this question:
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- 16.
The right wing AC electric fuel pump (AC PUMP 2) is powered by ...
- A.
AC ESS BUS.
- B.
AC BUS 1.
Correct Answer
A. AC ESS BUS.Explanation
The right wing AC electric fuel pump (AC PUMP 2) is powered by the AC ESS BUS.Rate this question:
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- 17.
______ scavenge jet pumps maintain the fuel level in the collector tank, ensuring a constant flow of fuel to the engine during normal flight.
- A.
Three
- B.
Four
Correct Answer
A. ThreeExplanation
Scavenge jet pumps are responsible for maintaining the fuel level in the collector tank. This ensures that there is a constant flow of fuel to the engine during normal flight.Rate this question:
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- 18.
A DC electric fuel pump is installed only in the right wing tank. It provides pressurized fuel for normal APU operation and engine start, when AC power or the AC fuel pump is not available. The DC electric fuel pump is powered by the ______________ and can be used in flight or on ground.
- A.
DC ESS BUS 2
- B.
DC ESS BUS 3
Correct Answer
A. DC ESS BUS 2Explanation
The DC electric fuel pump is powered by the DC ESS BUS 2. This bus provides electrical power to essential systems in the aircraft, including the fuel pump. The pump is installed in the right wing tank and is used for normal APU operation and engine start when AC power or the AC fuel pump is not available. It can be used both in flight and on the ground.Rate this question:
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- 19.
Setting the crossfeed selector knob to LOW 1 position opens the crossfeed valve and activates the AC PUMP 2, feeding both engines from ...
- A.
Wing tank 1.
- B.
Wing tank 2.
Correct Answer
B. Wing tank 2.Explanation
When the crossfeed selector knob is set to LOW 1 position, it opens the crossfeed valve and activates AC PUMP 2. This means that fuel is being transferred from wing tank 2 to both engines, feeding them. Therefore, the correct answer is wing tank 2.Rate this question:
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- 20.
Setting the crossfeed selector knob to LOW 2 position opens the crossfeed valve and activates AC PUMP 1, feeding both engines from wing tank 1.
- A.
Wing tank 1.
- B.
Wing tank 2.
Correct Answer
A. Wing tank 1.Explanation
The crossfeed selector knob is set to LOW 2 position, which means that the crossfeed valve is opened and AC PUMP 1 is activated. This allows fuel to be fed from wing tank 1 to both engines. Therefore, the correct answer is wing tank 1.Rate this question:
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- 21.
When the crossfeed knob is selected to LOW 1 or LOW 2, the amount of fuel supplied to the lower level side is __________ than the actual fuel burn of the engine on that side. This characteristic causes fuel to be transferred from one tank to the other.
- A.
Lower
- B.
Higher
Correct Answer
B. HigherExplanation
When the crossfeed knob is selected to LOW 1 or LOW 2, the amount of fuel supplied to the lower level side is higher than the actual fuel burn of the engine on that side. This means that more fuel is being supplied to the lower level side than is being consumed by the engine. This excess fuel then flows from the lower level tank to the higher level tank, causing fuel to be transferred from one tank to the other.Rate this question:
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- 22.
Setting AC PUMP 1 or 2 selector knob to any position different than _____ overrides fuel crossfeed pumps command.
- A.
AUTO
- B.
ON
Correct Answer
A. AUTOExplanation
Setting the AC PUMP 1 or 2 selector knob to any position different than AUTO overrides the fuel crossfeed pumps command. This means that if the selector knob is set to ON, for example, the fuel crossfeed pumps will not operate automatically as they would in the AUTO position.Rate this question:
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- 23.
When the wings fuel imbalance reaches its maximum operational limit ______, the EICAS CAUTION message FUEL IMBALANCE is displayed.
- A.
(360 kg)
- B.
(630 kg)
Correct Answer
A. (360 kg)Explanation
When the wings fuel imbalance reaches 360 kg, which is its maximum operational limit, the EICAS CAUTION message FUEL IMBALANCE is displayed.Rate this question:
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- 24.
When the wings fuel imbalance reduces to _____, the EICAS ADVISORY message FUEL EQUAL – XFEED OPEN is displayed, indicating that there is no fuel imbalance condition and the crossfeed valve is open.
- A.
45 kg
- B.
54 kg
Correct Answer
A. 45 kgExplanation
When the wings fuel imbalance reduces to 45 kg, the EICAS ADVISORY message FUEL EQUAL – XFEED OPEN is displayed, indicating that there is no fuel imbalance condition and the crossfeed valve is open.Rate this question:
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- 25.
Each wing tank has a dedicated Fuel Low Level sensor located in the collector box. The Fuel Low Level sensor ______________ of the fuel quantity indication system. Whenever the fuel level in the collector box is below the sensor level, it sends a fuel low level signal to the warning system, thus triggering the FUEL LO LEVEL warning EICAS message.
- A.
It depends
- B.
Is independent
Correct Answer
B. Is independentExplanation
The Fuel Low Level sensor is independent of the fuel quantity indication system. This means that it operates separately from the system that provides information about the fuel quantity in the tanks. The sensor is located in the collector box and when the fuel level in the box falls below the sensor level, it sends a signal to the warning system, triggering the FUEL LO LEVEL warning message on the EICAS (Engine Indicating and Crew Alerting System).Rate this question:
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- 26.
Under normal conditions, the low level warning message activation point is set at _______ of fuel in the associated wing tank.
- A.
400 kg
- B.
1000 kg
Correct Answer
A. 400 kgExplanation
The low level warning message activation point is set at 400 kg of fuel in the associated wing tank under normal conditions.Rate this question:
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- 27.
If any scavenge pump stops transferring fuel to the Collector Box, which might be caused by an engine failure, loss of motive flow or scavenge pumps failure/blockage, the fuel contained in the Collector Box flows ___ so that the fuel level inside the Collector Box and the rest of the tank reaches the same level.
- A.
Out
- B.
In
Correct Answer
A. OutExplanation
If any scavenge pump stops transferring fuel to the Collector Box, the fuel contained in the Collector Box flows out so that the fuel level inside the Collector Box and the rest of the tank reaches the same level. This means that the fuel will flow out of the Collector Box and into the rest of the tank, equalizing the fuel levels.Rate this question:
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- 28.
(Regarding last quiestion) Under this condition, if there is up to _______ (approximately) of fuelinside that tank it is possible that the level equivalent to the low levelwarning activation point will be reached as the fuel level inside thecollector box decreases, then FUEL 1 (2) LO LEVEL warning EICAS*message displays indicating that fuel level is below the low level sensor. Therefore, in case of loss of the transfer system to the Collector Box, the EICAS WARNING message FUEL 1 (2) LO LEVEL may display even though fuel quantity indication on the EICAS or MFD Fuel System Synoptic Page is up to ______ in that tank. *Same value for both answers.
- A.
2800 kg
- B.
4800 kg
Correct Answer
A. 2800 kgExplanation
If there is up to 2800 kg of fuel inside the tank, it is possible that the fuel level equivalent to the low level warning activation point will be reached as the fuel level inside the collector box decreases. This will cause the FUEL 1 (2) LO LEVEL warning EICAS message to display, indicating that the fuel level is below the low level sensor. Therefore, even if the fuel quantity indication on the EICAS or MFD Fuel System Synoptic Page shows a higher amount, the EICAS WARNING message FUEL 1 (2) LO LEVEL may still display.Rate this question:
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- 29.
Engine flameout due to fuel starvation may occur if the airplane is subjected to attitudes greater than ___ nose up or down, uncoordinated maneuvers or negative g’s.
- A.
5°
- B.
15°
Correct Answer
B. 15°Explanation
If the airplane is subjected to attitudes greater than 15° nose up or down, uncoordinated maneuvers, or negative g's, it can lead to engine flameout due to fuel starvation. This means that if the aircraft is tilted at an angle greater than 15° in either direction, or if it is performing maneuvers that are not coordinated or involves negative g-forces, there is a risk of the engine losing fuel supply and shutting down.Rate this question:
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