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

Question 1

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 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

In a given height, a given amount of ballast is unloaded from a gas balloon. How is the increase in height at 5500 m different from the increase in height at MSL by unloading the same amount of ballast?

Accepted Answer

At 5500 m the increase in height is twice as high

Answer

At 5500 m the increase in height is three times as high

Answer

At both heights the same increase in height is observed

Answer

At 5500 m the increase in height is four times as high

Question 4

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 5

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 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

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 8

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 9

How do volume, density and temperature change when a gas is being compressed?

Accepted Answer

Volume decreases, density increases, temperature increases

Answer

Volume decreases, density increases, temperature decreases

Answer

Volume increases, density decreases, temperature decreases

Answer

Volume decreases, density decreases, temperature decreases

Question 10

The vertical extent of air with pressure changing by 1% with 80 m difference in height is referred to as ...

Accepted Answer

Homogeneous

Answer

Unstable

Answer

Stable

Answer

Inhomogeneous

Exam questions Principles of Flight (Balloon) - Exam BPL Gas - Balloon Pilot License

Exam BPL Gas - Balloon Pilot License: Principles of Flight (Balloon) 10 Questions no time limit

Exam questions Principles of Flight (Balloon) - Exam BPL Gas - Balloon Pilot License

Exam BPL Gas - Balloon Pilot License: Principles of Flight (Balloon) 10 Questions no time limit

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