Principles of Flight (Balloon) - Quiz BPL Gas - Balloon Pilot License

Question 1

In a given height, a given amount of ballast is uloaded from a gas balloon. How is the increase in height at 5500m different from the increase in height at MSL by unloading the same amount of ballast?

Accepted Answer

At 5500m the increase in height is twice as high.

Answer

At 5500m the increase in height is three times as high.

Answer

At both heights the same increase in height is observed.

Answer

At 5500m the increase in height is four times as high.

Question 2

The ratio between air pressures at different heights is referred to as:

Accepted Answer

Height number

Answer

Height value

Answer

Pressure number

Answer

Height ratio

Question 3

The standard state of gases refers to which temperature?

Accepted Answer

25° C

Answer

5° C

Answer

0° C

Answer

15° C

Question 4

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 content of water vapour in the gas

Answer

On the mean kinetic energy of the molecules

Answer

On the number of gas molecules

Question 5

At which height the load carrying capability of a gas balloon is reduced by approximately 50% compared to MSL?

Accepted Answer

At 6.500 m

Answer

At 11.000 m

Answer

At 18.000 m

Answer

At 1.500 m

Question 6

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

Accepted Answer

Homogene

Answer

Unstable

Answer

Stable

Answer

Inhomogene

Question 7

What is a direct consequence of increase of the carrying gas temperature at a gas balloon with maximum differential pressure?

Accepted Answer

Load-bearing capability increases.

Answer

Climb force decreases.

Answer

Weight force increases.

Answer

Lift force decreases.

Question 8

What statement is correct with regard to change in temperature?

Accepted Answer

During descent, the carrying gas warms adiabatically.

Answer

During climb, the carrying gas warms due to thermal exchange with envorinmental air.

Answer

During descent, the carrying gas warms due to thermal exchange with envorinmental air.

Answer

During climb, the carrying gas warms adiabatically

Question 9

How do volume, density and temperature change when a gas is being compressed?

Accepted Answer

Volume decreases, density increases, temperature increases.

Answer

Volume increases, density decreases, temperature decreases

Answer

Volume decreases, density decreases, temperature decreases.

Question 10

The force resulting from the (positive) difference from load-bearing capacity and weight force, is referred to as:

Accepted Answer

Climb force

Answer

Load force

Answer

Upper force

Answer

Lift force

Quiz Principles of Flight (Balloon) - Quiz BPL Gas - Balloon Pilot License

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