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

Question 1

Below maximum differential pressure of a gas balloon, temperature increase of the carrying gas by 1K results in:

Accepted Answer

Volume increase by 0,4%

Answer

Volume decrease by 0,4%

Answer

Volume increase by 4%

Answer

Volume decrease by 4%

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

Unstable

Answer

Stable

Answer

Inhomogene

Question 3

What effect can sudden insolation from sunlight have on a gas balloon?

Accepted Answer

The height at maximum differential pressure decreases.

Answer

The height at maximum differential pressure increases.

Answer

The hull pressure decreases.

Answer

A sudden increase in rate of descent.

Question 4

How does the norm height of a gas balloon with maximum differential pressure change, when its mass is reduced by 1%?

Accepted Answer

Norm height increases by 80 m.

Answer

Norm height increases by 800 m.

Answer

Norm height decreases by 800 m.

Answer

Norm height decreases by 80 m

Question 5

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

Upper lift

Answer

Anti-ballast

Answer

Lower lift

Question 6

The standard state of gases refers to which temperature?

Accepted Answer

25° C

Answer

5° C

Answer

0° C

Answer

15° C

Question 7

What change results from an increase in temperature of the carrying gas and of the environmental air at a gas balloon at maximum differential pressure?

Accepted Answer

The load capability decreases by 0,4% per K temperature change.

Answer

The load capability decreases by 4% per K temperature change.

Answer

The load capability increases by 4% per K temperature change.

Answer

The load capability increases by 0,4% per K temperature change.

Question 8

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 9

The standard state of gases refers to which temperature?

Accepted Answer

25° C

Answer

15° C

Answer

5° C

Answer

0° C

Question 10

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.

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