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757 typerating - 2023 > 1 - Fuel > Flashcards

1 - Fuel Flashcards

1
Q

hvað taka tankarnir mikið í kg ?

A

Right main tank: 6600
Left tank: 6600
Center: 21,000 kg.

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2
Q

Hvað er miðað við mikið fuel density og hvað þýðir það?

A

Í raun þyngdarrstuðull á líterinn 0.8
Það þýðir að 8.213 lítrar væru 6600 kg.

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3
Q

LOW FUEL kemur, hvað er mikið eftir?

A

1000 kg

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4
Q

Hver er munurinn á scavange pump og suction feed?

A

Scavange pump operates automatically to transfer any remaining center tank fuel to the left main tank. Begins when left main tank is half empty.
Suction feed er bara backup sem virkar þannig að vegna loftþrýstings í háloftunum þá fer vél að geta sogið bensín beint úr tank framhjá pumpunum.

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5
Q

Suction feed line is located in…

A

both main tanks

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6
Q

If FWD or AFT FUEL X-FEED display comes on and valve light illuminates, the crossfeed switch is not turned on, what does it mean?

A

the valve is open

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7
Q

FUEL CONFIG, hvað þýðir þetta ljós?

A

1 - 800kg difference
2 - Meira en 600kg í center tank en center pump off
3 - Minna en 1000kg í öðrum hvorum main tank.

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8
Q

Fuel balancing is accomplished by…

A

opening the X-FEED valve and turning off the fuel pump for the tank that has the lowest quantity (L or r). Þá byrjar vél að sjúga úr þeim tank þar sem meira er í.

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9
Q

APU fuel is supplied from…

A

The left fuel manifold. Notar held ég venjulega AC fuel pump en notar DC pumpuna sem er í vinstri væng, ef AC er ekki available.

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10
Q

Fuel imbalance must not exceed ___ kg.

A

884

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11
Q

The center tank can contain ___ kg with less than full left or righ tanks

A

907

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12
Q

Fyllir ____ tanks fyrst

A

main

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13
Q

Hvar er temperature sensorinn?

A

right main tank

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14
Q

Hvernig virkar crossfeed?

A

Ýtir á og slekkur á fuel pump á þeim væng sem vantar fuel. Vélin fer þá að sjúga úr hinum tanknum.

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15
Q

Á hvaða legg þarftu að hætta að pæla í hvort þú ert að nota JET A upp á freezing level?

A

Hættir að factora þetta inn á fjórða legg. (Þarft að taka þetta í myndina á fyrsta legg auðvitað, en líka legg 2 og 3).

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16
Q

Freezing level á fuel frá USA?

A

37°C (Jet A)

17
Q

Hvað heitir fuel frá USA?

A

JET A

18
Q

Hvað heitir fuel frá EUR?

A

JET A1

19
Q

Hvað heitir þriðja fuel týpan og freezing level á henni?

A

Jet B; -50°C

20
Q

Hvað gerir þú ef þú ert kominn í vandamál varðandi freezing á fuel og hvernig veistu að þú ert kominn í vandræði?

A

Veist að þú ert kominn í vandræði ef fuel er komið innan við 3°C frá því að frjósa. T.d. í evrópu þá ertu kominn í vandræði ef fuel er komið í -44° þar sem það frýst í -47°C.
Eykur hraða (TAT eykst 0.5-0.7°C pr 0.1 Mach) og lækkar flug í allt að 25,000 ft.)

21
Q

Hvað geturðu sagt um fuelling?

A

1100 kg á mínútu with all fuel valves open.
Gert í gegnum hægri tank

22
Q

Minimum in-flight fuel tank temperature is 3°C above the freezing point of the fuel being used or ____°C, whichever is higher.

A

-45

23
Q

Hvernig fuel pumps eru í tönkunum þremur?

A

Left: 2 AC pumps, 1 DC pump (sem APU getur notað ef AC ekki available).
Center tank: 2 AC pumps. More pressure svo eyðist fyrst úr miðju tanki. Ef N3 er undir 50% þá er pumpan inhibited.
Right: 2 AC pumps

24
Q

Hvað gerir þú ef þú færð fuel leak og hvað telst sem fuel leak?

A

Engine shutdown. Fuel leak er ef það fer meira en 500 kg á 30 mínútum.

25
Q

Max fuel temperature is..

A

49°C

26
Q

Right and Center hydraulic system pressure is low. Is stabilizer trim available?

A

No. Stab trim er á hægra hydraulic kerfi og center.

27
Q

How many fuel tanks?

A

3

28
Q

Where is the fuel temperature measured?

A

Right tank

29
Q

How much fuel can you put approximately in the Center tank?

A

22.100 kg

30
Q

What is the approximate center tank
fuel capacity?
a) 21.100kg
b) 20.000kg
c) 17.000kg
d) 10.000kg

A

a) 21.100kg

31
Q

How much fuel can be stored in the Center fuel tank with less than full wing
tanks?
a) 800kg
b) 900kg
c) 1000kg
d) 1100kg

A

b) 900kg

32
Q

When will the DC fuel boost pump start automatically?
a) When the APU is started with battery power only
b) When the left forward boost pump switch is commanded off and the APU is running.
c) When the left aft boost pump switch is commanded off and the APU is running.

A

a) When the APU is started with battery
power only

33
Q

The FUEL CONFIGURATION light illuminates when there is more than 600 kilograms in the center tank with the center tank pumps off.
a) True.
b) False.

A

a) True

34
Q

The FUEL CONFIGURATION light illuminates and the EICAS message ‘FUEL CONFIG’ displays when there is less than 1000 kilograms in either wing tank.
a) True.
b) False.

A

c) True

35
Q

When AC power is established and the APU is running, what pump automatically supplies fuel to the APU, regardless of switch position?

A

Left forward fuel pump

36
Q

Hvernig reiknarðu CALCULATED fuel?

A

TOTALIZER fuel at engine start minus fuel burned

757 typerating - 2023 (21 decks)

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