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

Question 1

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 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

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 4

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 5

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 6

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%.

Question 7

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.

Question 8

What statement is correct with regard to change in temperature?

Accepted Answer

During descent, the carrying gas warms adiabatically.

Answer

During climb, the carrying gas warms due to thermal exchange with envorinmental air.

Answer

During descent, the carrying gas warms due to thermal exchange with envorinmental air.

Answer

During climb, the carrying gas warms adiabatically

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 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.

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