Performance 4

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

• increase;decrease

• decrease;increase

• increase;increase

• decrease;decrease

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.

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

• Increase.

• Decrease.

• Remain the same.

• Increase, then decrease.

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.

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.

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).

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.

VX and VY with take-off flaps will be:

• same as that for clean configuration.

• higher than that for clean configuration.

• lower 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 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 increases and the maximum gradient climb speed is not affected.

• 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.

• The thrust.

• The drag.

• The lift.