VX and VY with take-off flaps will be:

lower than that for clean configuration.

same as that for clean configuration.

higher than that for clean configuration.

changed so that VX increases and VY decreases compared to clean configuration.

Compared with still air, the effect a headwind has on the values of the maximum range speed and the maximum gradient climb speed respectively is that:

the maximum range speed increases and the maximum gradient climb speed is not affected.

the maximum range speed decreases and the maximum gradient climb speed is not affected.

the maximum range speed decreases and the maximum gradient climb speed decreases.

the maximum range speed decreases and the maximum gradient climb speed increases.

Which force compensates the weight in unaccelerated straight and level flight?

The resultant from lift and drag.

Can a stopway be used in take-off calculations?

Only if the clearway is shorter than the stopway.

Only if the stopway is shorter than the clearway.

If there is a tailwind:

the minimum drag speed is not affected.

the minimum drag speed is decreased by the same velocity as the wind.

the minimum drag speed is decreased.

the minimum drag speed is increased.

Flying the 'backside of thrust curve' means:

a lower airspeed requires more thrust.

the thrust required is independent of the airspeed.

a thrust reduction results in an acceleration of the aeroplane.

a lower airspeed requires less thrust because drag is decreased.

The maximum operating altitude for a certain aeroplane with a pressurised cabin:

is the highest pressure altitude certified for normal operation.

is only certified for four-engine aeroplanes.

is dependent on aerodynamic ceiling.

An aircraft is flying straight and level at height. If the mass were increased what actions would be necessary to maintain a constant angle of attack and altitude?

Increase speed, increase power.

Decrease speed, increase power.

Decrease speed, decrease power.

Increase speed, decrease power.

Induced drag is caused by:

movement of the aerofoil through the air.

Can the length of a stopway be added to the runway length to determine the take-off distance available?

Yes, but the stopway must be able to carry the weight of the aeroplane.

No, unless its centreline is on the extended centreline of the runway.

Yes, but the stopway must have the same width as the runway.

The absolute ceiling:

is the altitude at which the maximum rate of climb is zero.

can be reached only with minimum steady flight speed.

is the altitude at which the aeroplane reaches a maximum rate of climb of 100 ft/min.

is the altitude at which the best climb gradient attainable is 5%.

What is the effect of tailwind on the time to climb to a given altitude?

The time to climb does not change.

The effect on time to climb will depend on the aeroplane type.

The rate of climb is approximately equal to:

the still-air gradient multiplied by the TAS.

the still-air gradient divided by the TAS.

the angle of climb divided by the TAS.

the angle of climb multiplied by the TAS.

For a piston engine aeroplane, the speed for maximum range is:

that which gives the maximum lift to drag ratio.

that which gives the minimum value of induced drag.

1.4 times the stall speed in clean configuration.

that which gives the maximum value of lift.

An increase in atmospheric pressure has, among other things, the following consequences on landing performance:

a reduced landing distance and improved go-around performance.

a reduced landing distance and degraded go-around performance.

an increased landing distance and degraded go-around performance.

an increased landing distance and improved go-around performance.

What will be the effect of the extra passenger on board?

The performance will be degraded, the performance calculations should be performed again.

The performance will be degraded but the performance calculations need not be performed again as the safety factors are so large.

The performance will be improved.

In straight horizontal steady flight, at speeds below that for minimum drag:

a lower speed requires a higher thrust.

the aeroplane can be controlled only in level flight.

a higher speed, but still below that for minimum drag, requires a higher thrust.

the aeroplane cannot be controlled manually.

A change in aeroplane weight affects:

neither glide angle nor glide speed.

The angle of climb with flaps extended, compared to that with flaps retracted, will normally be:

increase at moderate flap setting, decrease at large flap setting.

The point where Drag coefficient/Lift coefficient is a minimum is:

the lowest point of the drag curve.

the point where a tangent from the origin touches the drag curve.

on the 'backside' of the drag curve.

The speed for minimum power in a turbojet will be:

slower than the speed for minimum drag.

slower in a climb and faster in a descent.

the same as the speed for minimum drag.

faster than the speed for minimum drag.

What happens if density altitude is 3000 ft at an airport whose elevation is 1000 ft?

Take-off and landing performance will be about the same as for an airport with an elevation of 3000 ft.

Take-off and landing performance will be unaffected.

The altimeter will indicate 3000 ft when the aircraft is on the ground.

Indicated speed at 50 kts on take-off and landing will be higher than in a standard atmosphere.

increases the angle of the descent flight path.

increases the descent distance over ground.

increases the angle of descent.

Ignoring the effect of compressibility, the effect a change of altitude has on the value of the coefficient of lift is that it:

increases with increasing altitude.

decreases with increasing altitude.

decreases with increasing altitude, but only at low speeds.

Which of the equations below expresses approximately the unaccelerated percentage climb gradient for small climb angles?

Climb Gradient = ((Thrust - Drag) ÷ Weight) x 100

Climb Gradient = ((Thrust + Drag) ÷ Lift) x 100

Climb Gradient = ((Thrust - Mass) ÷ Lift) x 100

Climb Gradient = (Lift ÷ Weight) x 100

On a reciprocating engine aeroplane, to maintain a given angle of attack, configuration and altitude at higher gross mass:

an increase in airspeed and power is required.

requires an increase in power and decrease in the airspeed.

an increase in airspeed is required but power setting does not change.

a higher coefficient of drag is required.

How does an increase in aircraft mass affect the gliding range?

Has no effect on gliding range.

Which of the following combinations adversely affect take-off and initial climb performance?

High temperature and high relative humidity.

Low temperature and low relative humidity.

Low temperature and high relative humidity.

High temperature and low relative humidity.

A headwind component increasing with altitude, as compared to zero wind condition (assuming TAS is constant):

has no effect on rate of climb.

improves angle and rate of climb.

does not have any effect on the angle of flight path during climb.

decreases angle and rate of climb.

On a reciprocating engine daeroplane, to maintain a given angle of attack, configuration and altitude at higher gross mass:

the airspeed and the drag will be increased.

the lift/drag ratio must be increased.

the airspeed will be decreased and the drag increased.

the airspeed will be increased but the drag does not change.

When flying an aircraft on the back of the drag curve, maintaining a slower speed (but still faster than VS) would require:

less thrust due to less parasited drag.

To obtain a positive rate of climb:

power required must be less than the power available.

power available must be less than the power required.

power available must be equal to power required.

thrust must exceed drag by the greatest margin.

If the aerodrome pressure altitude increases it will:

increase the take-off distance.

increase the take-off distance available.

decrease the take-off distance.

Which of the following statements is correct?

Induced drag decreases with increasing speed.

Induced drag is independent of the speed.

Induced drag decreases with increasing angle of attack.

Induced drag increases with increasing speed.

Performance 4

Authored by Duy Nguyễn

English

University

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50 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A higher temperature causes _ in air density and _ in lift.

increase;decrease

decrease;increase

increase;increase

decrease;decrease

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The tangent from the origin to the thrust required against true airspeed curve, for a jet aeroplane, determines the speed for:

minimum power.

maximum endurance.

maximum range.

maximum speed.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Ignoring the effect of compressibility, what would CL do with an increase in altitude?

Increase.

Decrease.

Remain the same.

Increase, then decrease.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

An aeroplane is in a power off glide at best gliding speed. If the pilot decreases the pitch attitude the glided distance:

decreases.

increases.

remains the same.

may increase or decrease depending on the aeroplane.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The maximum horizontal speed occurs when:

the maximum thrust is equal to the total drag.

the thrust is equal to the maximum drag.

the thrust is equal to minimum drag.

the thrust does not increase further with increasing speed.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The induced drag of an aeroplane at constant mass in un-accelerated level flight is greatest at:

VA (design manoeuvring speed).

VS1 (stalling speed in clean configuration).

VMO (maximum operating limit speed).

VSO (lowest achievable speed in a given configuration).

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The length of a clearway may be included in:

the take-off distance available.

the accelerate-stop distance available.

the take-off run available.

the distance to reach V1.

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Performance 4

A higher temperature causes ___ in air density and ___ in lift.

The tangent from the origin to the thrust required against true airspeed curve, for a jet aeroplane, determines the speed for:

Ignoring the effect of compressibility, what would CL do with an increase in altitude?

An aeroplane is in a power off glide at best gliding speed. If the pilot decreases the pitch attitude the glided distance:

The maximum horizontal speed occurs when:

The induced drag of an aeroplane at constant mass in un-accelerated level flight is greatest at:

The length of a clearway may be included in:

VX and VY with take-off flaps will be:

Compared with still air, the effect a headwind has on the values of the maximum range speed and the maximum gradient climb speed respectively is that:

Which force compensates the weight in unaccelerated straight and level flight?

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A higher temperature causes _ in air density and _ in lift.