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

Question 1

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 2

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

Question 3

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 4

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 5

What statement is correct with regard to the density of a gas?

Accepted Answer

The density decreases with increasing temperature and constant pressure.

Answer

The density increases with increasing temperature and constant volume.

Answer

The density decreases with increasing temperature and constant volume.

Answer

The density decreases with decreasing volume and constant temperature.

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

Aerostatic lift, amongst other factors, depends on...

Accepted Answer

Air density.

Answer

On the speed.

Answer

Balloon mass.

Answer

Shape of the envelope.

Question 8

The standard state of gases refers to which temperature?

Accepted Answer

25° C

Answer

15° C

Answer

5° C

Answer

0° C

Question 9

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 10

How does the norm height of a gas balloon with maximum differential pressure change by dropping ballast?

Accepted Answer

It increases by 80 m when total mass is reduced by 1%

Answer

It increases by 8 m when total mass is reduced by 10%.

Answer

It decreases by 8 m when total mass is reduced by 10%.

Answer

It decreases by 80 m when total mass is reduced by 1%.

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