Principles of Flight (Balloon) - BPL Hot Air - 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

Upper force

Answer

Lift force

Answer

Load force

Question 2

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 decreases, temperature decreases

Answer

Volume decreases, density increases, temperature decreases

Answer

Volume increases, density decreases, temperature decreases

Question 3

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

Accepted Answer

Homogeneous

Answer

Inhomogeneous

Answer

Unstable

Answer

Stable

Question 4

Changing the shape of the envelope of a free balloon, e.g. by a gust, results in:

Accepted Answer

Decrease in volume

Answer

Increase in lift

Answer

Increase of displaced air

Answer

Decrease in weight

Question 5

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

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 cools due to thermal contact with environmental air

Answer

The gas heats adiabatically due to expansion

Answer

The gas condenses inside the envelope

Question 7

What effect has an increase in air temperature inside the hull of a hot air balloon by a given difference in temperature?

Accepted Answer

The increase in load carrying capacity decreases with height

Answer

The increase in load carrying capacity increases with height

Answer

The increase in rate of climb increases with height

Answer

The reduction in sink rate increases with height

Question 8

If heating is stopped and the parachute vent is not activated, a hot-air balloon reaches a final sinkrate of approximately:

Accepted Answer

6 m/s

Answer

2 m/s

Answer

10 m/s

Answer

20 m/s

Question 9

With regard to gases, which statement is correct?

Accepted Answer

Volume increases with increasing temperature and constant pressure

Answer

Temperature increases with increasing volume and decreasing pressure

Answer

Temperature decreases with increasing pressure and constant volume

Answer

Pressure decreases with increasing temperature and constant volume

Question 10

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

Accepted Answer

Air density

Answer

Shape of the envelope

Answer

On the speed

Answer

Balloon mass

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

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

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

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

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