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MASS&BALANCE > 2. 30 > Flashcards

2. 30 Flashcards

1
Q

Given: Maximum structural take-off mass= 146 900 kg, Maximum structural landing mass= 93 800 kg, Maximum zero fuel mass= 86 400 kg, Trip fuel= 27 500 kg, Block fuel= 35 500 kg
Engine starting and taxi fuel = 1 000 kg. The maximum take-off mass is equal to:

A

120 900 kg

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2
Q

Given: Aeroplane mass = 36 000 kg Centre of gravity (cg) is located at station 17 m What is the effect on cg location if you move 20 passengers (total mass = 1 600 kg) from station 16 to station 23?

A

It moves aft by 0.31 m.

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3
Q

In mass and balance calculations the “index” is:

A

is a figure without unit of measurement which represents a moment.

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4
Q

Loads must be adequately secured in order to:

A

avoid unplanned centre of gravity (cg) movement and aircraft damage.

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5
Q

Traffic load is the:

A

Zero Fuel Mass minus Dry Operating Mass.

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6
Q

Given the following information, calculate the loaded centre of gravity (cg). Details at reference.

A

56.53 cm aft datum.

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7
Q

Given that the total mass of an aeroplane is 112 000 kg with a centre of gravity position at 22.62m aft of the datum. The centre of gravity limits are between 18m and 22m. How much mass must be removed from the rear hold (30 m aft of the datum) to move the centre of gravity to the middle of the limits:

A

29 344 kg

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8
Q

The total mass of an aeroplane is 145000 kg and the centre of gravity limits are between 4.7 m and 6.9 m aft of the datum. The loaded centre of gravity position is 4.4 m aft. How much mass must be transferred from the front to the rear hold in order to bring the out of limit centre of gravity position to the foremost limit:

A

7 500 kg

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9
Q

What determines the longitudinal stability of an aeroplane ?

A

The location of the centre of gravity with respect to the neutral point.

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10
Q

Assuming gross mass, altitude and airspeed remain unchanged, movement of the centre of gravity from the forward to the aft limit will cause

A

increased cruise range.

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11
Q

While making mass and balance calculation for a particular aircraft, the term ‘Basic Empty Mass’ applies to the sum of airframe, engine(s), fixed ballast plus

A

unusable fuel and full operating fluids.

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12
Q

The term ‘Maximum Zero Fuel Mass’ consist of:

A

The maximum permissible mass of an aeroplane with no usable fuel.

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13
Q

The actual ‘Zero Fuel Mass’ is equal to the:

A

Dry Operating Mass plus the traffic load.

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14
Q

The actual ‘Take-off Mass’ is equivalent to:

A

Dry Operating Mass plus take-off fuel and the traffic load

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15
Q

Calculate the centre of gravity in % MAC (mean aerodynamic chord) with following data: Distance datum - centre of gravity: 12.53 m Distance datum - leading edge: 9.63 m Length of MAC: 8 m

A

36.3 % MAC

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16
Q

With respect to aeroplane loading in the planning phase, which of the following statements is always correct ? LM = Landing Mass TOM = Take-off Mass MTOM = Maximum Take-off Mass ZFM = Zero Fuel Mass MZFM = Maximum Zero Fuel Mass DOM = Dry Operating Mass

A

LM = TOM - Trip Fuel

17
Q

Given an aeroplane with:
Maximum Structural Landing Mass: 125000 kg
Maximum Zero Fuel Mass: 108500 kg
Maximum Structural Take-off Mass: 155000 kg
Dry Operating Mass: 82000 kg
Scheduled trip fuel is 17000 kg and the reserve fuel is 5000 kg.
Assuming performance limitations are not restricting, the maximum permitted take-off mass and maximum traffic load are respectively:

A

130500 kg and 26500 kg

18
Q

For the purpose of completing the Mass and Balance documentation, the Traffic Load is considered to be equal to the Take-off Mass

A

less the Operating Mass.

19
Q

For the purpose of completing the Mass and Balance documentation, the Operating Mass is considered to be Dry Operating Mass plus

A

Take-off Fuel Mass.

20
Q

When establishing the mass breakdown of an aeroplane, the empty mass is defined as the sum of the:

A

standard empty mass plus specific equipment mass plus trapped fluids plus unusable fuel mass

21
Q

For the purpose of completing the Mass and Balance documentation, the Dry Operating Mass is defined as:

A

The total mass of the aircraft ready for a specific type of operation excluding all usable fuel and traffic load.

22
Q

An aeroplane’s weighing schedule indicates that the empty mass is 57320 kg. The nominal Dry Operating Mass is 60120 kg and the Maximum Zero Fuel Mass is given as 72100 kg. Which of the following is a correct statement in relation to this aeroplane?

A

operational items have a mass of 2800 kg and the maximum traffic load for this aeroplane is 11980 kg.

23
Q

An aeroplane is to depart from an airfield where the performance limited take-off mass is 89200 kg.
Certificated maximum masses are as follows:

Ramp (taxi) mass : 89930 kg,
Maximum Take-off mass : 89430 kg,
MaximumLanding mass : 71520 kg,
Actual Zero fuel mass : 62050 kg,
Fuel on board at ramp: Taxi fuel : 600 kg,
Trip fuel : 17830 kg,
Contingency, final reserve and alternate : 9030 kg.

If the Dry Operating Mass is 40970 kg the traffic load that can be carried on this flight is

A

21080 kg

24
Q

The empty mass of an aeroplane, as given in the weighing schedule, is 61300 kg. The operational items (including crew) is given as a mass of 2300 kg. If the take-off mass is 132000 kg (including a useable fuel quantity of 43800 kg) the useful load is

A

68400 kg

25
Q

The following data applies to an aeroplane which is about to take off:
Certified maximum take-off mass - 141500 kg
Performance limited take-off mass - 137300 kg
Dry Operating Mass - 58400 kg
Crew and crew hand baggage mass - 640 kg
Crew baggage in hold - 110 kg
Fuel on board - 60700 kg
From this data calculate the mass of the useful load.

A

78900 kg

26
Q

A revenue flight is to be made by a jet transport. The following are the aeroplane’s structural limits:
-Maximum Ramp Mass: 69 900 kg, -Maximum Take Off Mass: 69 300 kg, Maximum Landing Mass: 58 900 kg, Maximum Zero Fuel Mass: 52 740 kg. The performance limited take off mass is 67 450kg and the performance limited landing mass is 55 470 kg.
Dry Operating Mass: 34 900 kg. Trip Fuel: 6 200 kg. Taxi Fuel: 250 kg. Contingency & final reserve fuel:1 300 kg. Alternate Fuel: 1 100 kg.
The maximum traffic load that can be carried is:

A

17 840 kg

27
Q

A revenue flight is to be made by a jet transport. The following are the aeroplane’s structural limits:
-Maximum Ramp Mass: 69 900 kg, -Maximum Take Off Mass: 69 300 kg, Maximum Landing Mass: 58 900 kg, Maximum Zero Fuel Mass: 52 740 kg. Take Off and Landing mass are not performance limited.
Dry Operating Mass: 34 930 kg
Trip Fuel: 11 500 kg
Taxi Fuel: 250 kg
Contingency & final reserve fuel: 1 450 kg
Alternate Fuel: 1 350 kg
The maximum traffic load that can be carried is:

A

17 810 kg

28
Q

A revenue flight is to be made by a jet transport. The following are the aeroplane’s structural limits:
-Maximum Ramp Mass: 69 900 kg, -Maximum Take Off Mass: 69 300 kg, Maximum Landing Mass: 58 900 kg, Maximum Zero Fuel Mass: 52 740 kg
Take Off and Landing mass are not performance limited.
Dry Operating Mass: 34 900 kg
Trip Fuel: 11 800 kg
Taxi Fuel: 500 kg
Contingency & final reserve fuel: 1 600 kg
Alternate Fuel:1 900 kg
The maximum traffic load that can be carried is:

A

17 840 kg

29
Q

The following data is extracted from an aeroplane’s loading manifest: Performance limited take-off mass 93500 kg Expected landing mass at destination 81700 kg Maximum certificated landing mass 86300 kg Fuel on board 16500 kg
During the flight a diversion is made to an en-route alternate which is not ‘performance limited’ for landing. Fuel remaining at landing is 10300 kg. The landing mass

A

is 87300 kg and excess structural stress could result

30
Q

If other factors are unchanged, the fuel mileage (nautical miles per kg) is

A

lower with a forward centre of gravity position.

MASS&BALANCE (6 decks)

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