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

Question 1

How does the norm height of a gas balloon with maximum differential pressure change, when its mass is reduced by 1%?

Accepted Answer

Norm height increases by 80 m

Answer

Norm height increases by 800 m

Answer

Norm height decreases by 800 m

Answer

Norm height decreases by 80 m

Question 2

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 by a factor of 4 with double pressure

Answer

The ratio between pressure and volume is constant

Answer

The volume increases proportional with pressure

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

At which height the load carrying capability of a gas balloon is reduced by approximately 50% compared to MSL?

Accepted Answer

At 6500 m

Answer

At 11000 m

Answer

At 18000 m

Answer

At 1500 m

Question 5

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 increasing temperature and constant volume

Answer

The density decreases with decreasing volume and constant temperature

Question 6

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 7

How does the norm height of a gas balloon with maximum differential pressure change by dropping ballast?

Accepted Answer

It increases by 80 m when total mass is reduced by 1%

Answer

It increases by 8 m when total mass is reduced by 10%

Answer

It decreases by 8 m when total mass is reduced by 10%

Answer

It decreases by 80 m when total mass is reduced by 1%

Question 8

The aerostatic lift corresponds to which force?

Accepted Answer

The weight of the displaced air

Answer

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

Answer

The drag due to airstream around the balloon envelope

Answer

The weight of the balloon less ballast

Question 9

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

Accepted Answer

Air density

Answer

On the speed

Answer

Balloon mass

Answer

Shape of the envelope

Question 10

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

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

You have reached the free limit

Upgrading to PRO gives you access to: