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

Question 1

The standard state of gases refers to which temperature?

Accepted Answer

25° C

Answer

15° C

Answer

5° C

Answer

0° C

Question 2

The standard state of gases refers to which temperature?

Accepted Answer

25° C

Answer

5° C

Answer

0° C

Answer

15° C

Question 3

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 content of water vapour in the gas

Answer

On the mean kinetic energy of the molecules

Answer

On the number of gas molecules

Question 4

What change results from an increase in temperature of the carrying gas and of the environmental air at a gas balloon at maximum differential pressure?

Accepted Answer

The load capability decreases by 0.4% per K temperature change

Answer

The load capability decreases by 4% per K temperature change

Answer

The load capability increases by 4% per K temperature change

Answer

The load capability increases by 0.4% per K temperature change

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

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 7

What is the difference between a gas balloon at or below maximum differential pressure during climb?

Accepted Answer

The balloon below maximum differential pressure climbs with constant rate to unlimited height

Answer

The balloon at maximum differential pressure climbs with constant rate to unlimited height

Answer

The balloon below maximum differential pressure climbs with constant rate up to maximum differential pressure height

Answer

The balloon at maximum differential pressure climbs with constant rate up to maximum differential pressure height

Question 8

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

Accepted Answer

Air density

Answer

On the speed

Answer

Balloon mass

Answer

Shape of the envelope

Question 9

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

Accepted Answer

Homogeneous

Answer

Unstable

Answer

Stable

Answer

Inhomogeneous

Question 10

What statement is correct with regard to change in temperature?

Accepted Answer

During descent, the carrying gas warms adiabatically

Answer

During climb, the carrying gas warms due to thermal exchange with environmental air

Answer

During descent, the carrying gas warms due to thermal exchange with environmental air

Answer

During climb, the carrying gas warms adiabatically

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