Principles of Flight (Balloon) - Quiz BPL Hot Air - Balloon Pilot License

Question 1

At which conditions does the arm blower have the highest effeiciency?

Accepted Answer

By completely filling the balloon opening with the air beam.

Answer

With as small distance to the balloon opening as possible.

Answer

By evenly swiveling for better air spreading.

Answer

By placing the blower inside the hull.

Question 2

The vertical extend of air with pressure changing by 1% with 80 m difference in height is referred to as ...

Accepted Answer

Homogene

Answer

Inhomogene

Answer

Unstable

Answer

Stable

Question 3

With pressure and temperature given, any gas being heavier or lighter than air depends on what?

Accepted Answer

On the molecule mass of the gas

Answer

On the mean kinetic energy of the molecules

Answer

On the content of water vapour in the gas

Answer

On the number of gas molecules

Question 4

The dynamic lift created by airflow across the top of the envelope of a balloon on the ground is referred to as?

Accepted Answer

False lift

Answer

Lower lift

Answer

Upper lift

Answer

Anti-ballast

Question 5

With regard to gases, which statement is correct?

Accepted Answer

Volume increases with increasing temperature and constant pressure.

Answer

Temperature increases with increasing volume and decreasing pressure.

Answer

Temperature decreases with increasing pressure and constant volume.

Answer

Pressure decreases with increasing temperature and constant volume.

Question 6

The increase in load carrying capability by increasing the hull air temperature by the same temperature difference ...

Accepted Answer

Decreases with altitude.

Answer

Increases with balloon mass.

Answer

Increases with altitude.

Answer

Decreases with sinking.

Question 7

According ISA, what is the density of air at MSL?

Accepted Answer

1.225 kg/m3

Answer

1.225 g/m3

Answer

1225 kg/m3

Answer

12.25 kg/m3

Question 8

What impact may rain have on operation of a hot-air balloon?

Accepted Answer

Total mass and gas consumption increase

Answer

Rain drops hitting on the hull reduce the lift force.

Answer

The hull is deformed, which reduces lift.

Answer

The hull is cooled, resulting in less gas consumption.

Question 9

Doubling the pressure of a dry gas at constant temperature results in a change of the volume to:

Accepted Answer

Half the previous value.

Answer

Double the previous value.

Answer

Four times the previous value.

Answer

A quarter of the previous value.

Question 10

What effect has an increase in air temperature inside the hull of a hot air balloon by a given difference in temperature?

Accepted Answer

The increase in load carrying capacity decreases with height.

Answer

The increase in load carrying capacity increases with height.

Answer

The increase in rate of climb increases with height.

Answer

The reduction in sink rate increases with height.

Quiz Principles of Flight (Balloon) - Quiz BPL Hot Air - Balloon Pilot License

Test 10 Questions Quiz BPL Hot Air - Balloon Pilot License - Principles of Flight (Balloon), no time limit