Navigation - Exam BPL Gas - Balloon Pilot License

Question 1

Which are the official basic units for horizontal distances used in aeronautical navigation and their abbreviations?

Accepted Answer

Nautical miles (NM), kilometers (km)

Answer

Feet (ft), inches (in)

Answer

Yards (yd), meters (m)

Answer

Land miles (SM), sea miles (NM)

Question 2

How many satellites are necessary for a precise and verified three-dimensional determination of the position?

Accepted Answer

Four

Answer

Five

Answer

Two

Answer

Three

Question 3

A distance of 7.5 cm on an aeronautical chart represents a distance of 60.745 NM in reality. What is the chart scale?

Accepted Answer

1 : 1500000

Answer

1 : 500000

Answer

1 : 1000000

Answer

1 : 150000

Question 4

With Central European Time (CET) given as UTC+1, what UTC time corresponds to 1700 CET?

Accepted Answer

1600 UTC

Answer

1800 UTC

Answer

1500 UTC

Answer

1700 UTC

Question 5

What is the distance between the two parallels of longitude 150°E and 151°E along the equator?

Accepted Answer

60 NM

Answer

60 km

Answer

1 NM

Answer

111 NM

Question 6

Electronic devices on board of an aeroplane have influence on the...

Accepted Answer

Direct reading compass

Answer

Artificial horizon

Answer

Airspeed indicator

Answer

Turn coordinator

Question 7

The circumference of the Earth at the equator is approximately... See figure (NAV-002)

Accepted Answer

21600 NM

Answer

40000 NM

Answer

12800 km

Answer

10800 km

Question 8

The term 'civil twilight' is defined as...

Accepted Answer

The period of time before sunrise or after sunset where the midpoint of the sun disk is 6 degrees or less below the true horizon

Answer

The period of time before sunrise or after sunset where the midpoint of the sun disk is 12 degrees or less below the true horizon

Answer

The period of time before sunrise or after sunset where the midpoint of the sun disk is 6 degrees or less below the apparent horizon

Answer

The period of time before sunrise or after sunset where the midpoint of the sun disk is 12 degrees or less below the apparent horizon

Question 9

Which approximate, geometrical form describes the shape of the Earth best for navigation systems?

Accepted Answer

Ellipsoid

Answer

Sphere of ecliptical shape

Answer

Flat plate

Answer

Perfect sphere

Question 10

What distance corresponds to one degree difference in latitude along any degree of longitude?

Accepted Answer

60 NM

Answer

60 km

Answer

30 NM

Answer

1 NM

Exam questions Navigation - Exam BPL Gas - Balloon Pilot License

Exam BPL Gas - Balloon Pilot License: Navigation 10 Questions no time limit