Performance 5

Assuming that the required lift exists, which forces determine an aeroplane's angle of climb?

• Weight and drag only.

• Weight and thrust only.

• Weight, drag and thrust.

• Thrust and drag only.

A clearway:

• provides an area over which an aeroplane can safely transit from lift off to the required height.

• need not have the same weight bearing qualities as the runway with which it is associated.

• may be water.

• all of the above.

Relative to the ground ahead wind ___ the effective climb angle and a tail wind ___ the effective climb angle.

• increases; decreases

• decreases; increases

• increases; increases

• decreases; decreases

Under what condition does pressure altitude have the same value as density altitude?

• When the altimeter has no position error.

• At sea level when the temperature is 0 ̊C.

• At standard temperature.

• When the altimeter setting is 1013.2 hPa.

A higher outside air temperature:

• does not have any noticeable effect on climb performance.

• increases the angle of climb but decreases the rate of climb.

• reduces the angle and the rate of climb.

• reduces the angle of climb but increases the rate of climb.

The airspeed for jet aeroplanes at which power required is a minimum:

• is lower than the minimum drag speed in the climb and higher than the minimum drag speed in the descent.

• is always higher than the minimum drag speed.

• is always lower than the minimum drag speed.

• is the same as the minimum drag speed.

Density altitude is:

• The height above mean sea level corrected for the prevailing atmospheric density.

• The pressure altitude corrected for the prevailing atmospheric density.

• The height above mean sea level corrected for the ISA atmospheric density.

• The pressure altitude corrected for ISA atmospheric density.

An aircraft is operating at the optimum glide speed. When mass decreases what happens to the glide angle and rate of descent (maintaining optimum glide speed)?

• The glide angle decreases and the rate of descent is unchanged.

• The glide angle is unchanged and the rate of descent decreases.

• The glide angle decreases and the rate of descent decreases.

• Both the glide angle and rate of descent are unchanged.

Two identical aircraft, one with a light load and one with a heavy load, are in a glide descent from the same height in the same atmospheric conditions. The heavy aircraft will:

• require a faster speed to achieve the same descent angle as the lighter aircraft.

• descend at the same angle with the same time in the descent but at a faster speed.

• descend steeper, at a faster speed with a greater rate of descent.

• descend at a steeper angle at a faster speed at the same rate of descent.

At a higher gross mass on a piston-engined aeroplane, in order to maintain a given angle of attack, configuration and altitude:

• the lift/drag ratio must be increased.

• the airspeed must be increased and the drag will remain unchanged.

• the airspeed must be increased and the drag will also increase.

• the airspeed must be decreased and the drag will increase.