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

Question 1

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 2

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 3

The standard state of gases refers to which temperature?

Accepted Answer

25° C

Answer

15° C

Answer

0° C

Answer

5° C

Question 4

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 5

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 6

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 7

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 8

The final sinkrate of a hot-air ballon is achieved after descent over a vertical distance of:

Accepted Answer

250 - 450 m

Answer

1000 - 2000 m

Answer

50 - 100 m

Answer

500 - 1000 m

Question 9

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

Accepted Answer

Air density.

Answer

Shape of the envelope.

Answer

On the speed.

Answer

Balloon mass.

Question 10

The standard state of gases refers to which temperature?

Accepted Answer

25° C

Answer

0° C

Answer

15° C

Answer

5° C

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

Test 10 Questions Quiz BPL Hot Air - Balloon Pilot License - Principles of Flight (Balloon), no time limit