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

Question 1

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 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

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

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 5

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 6

How does a gas react when released from a pressurized container?

Accepted Answer

The gas cools adiabatically due to expansion.

Answer

The gas heats adiabatically due to expansion

Answer

The gas condenses inside the envelope

Answer

The gas cools due to thermal contact with environmental air.

Question 7

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 8

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 9

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 10

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

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