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

Question 1

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

Lower lift

Answer

Upper lift

Answer

Anti-ballast

Question 2

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 3

The aerostatic lift corresponds to which force?

Accepted Answer

The weight of the displaced air

Answer

The weight of the balloon less ballast

Answer

The dynamic force due to airstream across the top of the hull

Answer

The drag due to airstream around the balloon envelope

Question 4

Which of the following statements is correct?

Accepted Answer

The density of hull air is lower than environmental air only if the hull temperature is higher than environmental temperature

Answer

The density of hull air is lower with decreasing environmental pressure

Answer

The density of hull air is higher with increasing environmental pressure

Answer

The density of hull air is lower than environmental air only if the hull temperature is lower than environmental temperature

Question 5

The ratio between air pressures at different heights is referred to as:

Accepted Answer

Height number

Answer

Pressure number

Answer

Height value

Answer

Height ratio

Question 6

What impact may rain have on operation of a hot-air balloon?

Accepted Answer

Total mass and gas consumption increase

Answer

Rain drops hitting on the hull reduce the lift force

Answer

The hull is deformed, which reduces lift

Answer

The hull is cooled, resulting in less gas consumption

Question 7

The increase in load carrying capability by increasing the hull air temperature by the same temperature difference ...

Accepted Answer

Decreases with altitude

Answer

Increases with balloon mass

Answer

Increases with altitude

Answer

Decreases with sinking

Question 8

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 9

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 10

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

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

You have reached the free limit

Upgrading to PRO gives you access to: