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

Question 1

Which of the following statements is correct?

Accepted Answer

At higher altitude, sink rate in case of cooling is increased due to less drag by less density

Answer

At higher altitude, sink rate by cooling is not increased because due to low density the mass inside the hull is also less

Answer

Higher drag at higher altitude prevents increased sink rate in case of cooling

Answer

Maximum sink rate must be equal at all altitudes as prescribed by design regulations

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 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 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

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 5

The final sinkrate of a hot-air balloon 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 6

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 7

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 8

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 9

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 10

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

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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