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

Question 1

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 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

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 4

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 5

What cause may result in a reduction of volume of a free balloon?

Accepted Answer

A gust

Answer

Reduction in mass

Answer

Cooling of environment air

Answer

Increase in hull temperature

Question 6

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 7

At equilibrium the inner overpressure of a free balloon is highest at:

Accepted Answer

The upper pole

Answer

At the lower opening

Answer

At the center of the hull

Answer

At the equator

Question 8

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 decreasing volume and constant temperature

Answer

The density decreases with increasing temperature and constant volume

Question 9

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 10

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

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: