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

Question 1

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 2

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 3

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 4

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 5

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 6

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 7

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 8

The standard state of gases refers to which temperature?

Accepted Answer

25° C

Answer

5° C

Answer

0° C

Answer

15° C

Question 9

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 10

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

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