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

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 3

What is the relationship between pressure and volume of a dry gas at constant temperature?

Accepted Answer

The volume is inversely proportional to pressure

Answer

The volume increases by a factor of 4 with double pressure

Answer

The ration between pressure and volume is constant

Answer

The volume increases proportional with pressure

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

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 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

At equilibrium the inner overpressure of a free balloon is highest at:

Accepted Answer

The upper pole.

Answer

At the equator

Answer

At the center of the hull

Answer

At the lower opening

Question 8

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 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

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.

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