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

Question 1

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 2

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 3

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 4

How should the cold-air inflation fan be positioned for efficient inflation of a hot-air balloon envelope?

Accepted Answer

So that its airflow fills the balloon mouth effectively

Answer

With as small distance to the balloon opening as possible

Answer

By evenly swiveling for better air spreading

Answer

By placing the blower inside the hull

Question 5

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 6

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 proportional with pressure

Answer

The volume increases by a factor of 4 with double pressure

Answer

The ratio between pressure and volume is constant

Question 7

With pressure and temperature given, any gas being heavier or lighter than air depends on what?

Accepted Answer

On the molecule mass of the gas

Answer

On the mean kinetic energy of the molecules

Answer

On the content of water vapour in the gas

Answer

On the number of gas molecules

Question 8

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 9

What temperature is specified for gases under the IUPAC definition of standard temperature and pressure (STP, with a pressure of 100 kPa)?

Accepted Answer

0° C

Answer

15° C

Answer

25° C

Answer

5° C

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 Licence

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

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

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

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