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

Question 1

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 2

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

Accepted Answer

Air density.

Answer

On the speed.

Answer

Balloon mass.

Answer

Shape of the envelope.

Question 3

What is the difference between a gas balloon at or below maximum differential pressure during climb?

Accepted Answer

The balloon below maximum differential pressure climbs with constant rate to unlimited height.

Answer

The balloon at maximum differential pressure climbs with constant rate to unlimited height.

Answer

The balloon below maximum differential pressure climbs with constant rate up to maximum differential pressure height.

Answer

The balloon at maximum differential pressure climbs with constant rate up to maximum differential pressure height.

Question 4

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 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

With regard to gases, which statement is correct?

Accepted Answer

Volume increases with increasing temperature and constant pressure.

Answer

Temperature decreases with increasing pressure and constant volume

Answer

Pressure decreases with increasing temperature and constant volume.

Answer

Temperature increases with increasing volume and decreasing pressure.

Question 7

The standard state of gases refers to which temperature?

Accepted Answer

25° C

Answer

5° C

Answer

0° C

Answer

15° C

Question 8

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 9

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 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