Exam quiz Aircraft General Knowledge - Exam BPL Gas - Balloon Pilot License

Question 1

The density of helium gas under standard conditions is:

Accepted Answer

0,2 kg / m3

Answer

2 kg / m3

Answer

0,02 g / m3

Answer

0,2 g / m3

Question 2

Lower-than-standard temperature may lead to...

Accepted Answer

An altitude indication which is too high

Answer

A correct altitude indication as long as the altimeter subscale is set to correct for non-standard temperature

Answer

An altitude indication which is too low

Answer

A blockage of the Pitot tube by ice, freezing the altimeter indication to its present value

Question 3

Which instrument can be affected by the hysteresis error?

Accepted Answer

Altimeter

Answer

Tachometer

Answer

Vertical speed indicator

Answer

Direct reading compass

Question 4

A vertical speed indicator connected to a too big equalizing tank results in...

Accepted Answer

Indication too high

Answer

Mechanical overload

Answer

No indication

Answer

Indication too low

Question 5

A gas balloon has to be equipped with which tethers?

Accepted Answer

2 at 10 m or 1 at 20 m

Answer

1 at 40 m or 4 at 10 m

Answer

1 at 30 m or 3 at 10 m

Answer

2 at 20 m or 1 at 10 m

Question 6

Which is the purpose of the altimeter subscale?

Accepted Answer

To reference the altimeter reading to a predetermined level such as mean sea level, aerodrome level or pressure level 1013.25 hPa

Answer

To adjust the altimeter reading for non-standard temperature

Answer

To set the reference level for the altitude decoder of the transponder

Answer

To correct the altimeter reading for system errors

Question 7

The minimum length of the towing rope is:

Accepted Answer

30 m

Answer

20 m

Answer

50 m

Answer

100 m

Question 8

How will the sag of the pull rope change during descent?

Accepted Answer

It will decrease

Answer

It will remain unchanged

Answer

It will increase

Answer

It will change periodically

Question 9

What technical measure provides electric conductivity to the hull ropes of a web-less gas balloon?

Accepted Answer

Embedded steel threads (filaments)

Answer

Wrapping with plastic tape

Answer

A surface painting

Answer

Impregnation of the ropes

Question 10

The towing rope of a gas balloon can be found on ...

Accepted Answer

The rip panel side

Answer

The sandpourer side

Answer

The sliding side

Answer

The entry side

Question 11

A flight level is a...

Accepted Answer

Pressure altitude

Answer

True altitude

Answer

Density altitude

Answer

Altitude above ground

Question 12

The measurement of altitude is based on the change of the...

Accepted Answer

Static pressure

Answer

Dynamic pressure

Answer

Differential pressure

Answer

Total pressure

Question 13

During a flight in an air mass with a temperature equal to ISA and the QNH set correctly, the indicated altitude is...

Accepted Answer

Equal to the true altitude

Answer

Higher than the true altitude

Answer

Lower than the true altitude

Answer

Equal to the standard atmosphere

Question 14

What values are usually marked with a red line on instrument displays?

Accepted Answer

Operational limits

Answer

Caution areas

Answer

Recommended areas

Answer

Operational areas

Question 15

What is the purpose of the closing rope of a gas balloon?

Accepted Answer

To close the appendix

Answer

To close the sand disposer

Answer

To close the emergency opening

Answer

To secure the towing rope

Question 16

A vertical speed indicator measures the difference between...

Accepted Answer

Instantaneous static pressure and previous static pressure

Answer

Instantaneous total pressure and previous total pressure

Answer

Total pressure and static pressure

Answer

Dynamic pressure and total pressure

Question 17

The altimeter's reference scale is set to airfield pressure (QFE). What indication is shown during the flight?

Accepted Answer

Height above airfield

Answer

Airfield elevation

Answer

Pressure altitude

Answer

Altitude above MSL

Question 18

Which of the following options states the working principle of a vertical speed indicator?

Accepted Answer

Measuring the present static air pressure and comparing it to the static air pressure inside a reservoir

Answer

Static air pressure is measured and compared against a vacuum

Answer

Measuring the vertical acceleration through the displacement of a gimbal-mounted mass

Answer

Total air pressure is measured and compared to static pressure

Question 19

The assembly of the panels to the hull of a web-less gas balloon is done ...

Accepted Answer

By gluing

Answer

By vulcanisation

Answer

By stitching

Answer

By welding

Question 20

In which way may an altimeter subscale which is set to an incorrect QNH lead to an incorrect altimeter reading?

Accepted Answer

If the subscale is set to a higher than actual pressure, the indication is too high. This may lead to much closer proximity to the ground than intended

Answer

If the subscale is set to a higher than actual pressure, the indication is too low. This may lead to much greater heights above the ground than intended

Answer

If the subscale is set to a lower than actual pressure, the indication is too high. This may lead to much closer proximity to the ground than intended

Answer

If the subscale is set to a lower than actual pressure, the indication is too low. This may lead to much closer proximity to the ground than intended

Question 21

QFE is the...

Accepted Answer

Barometric pressure at a reference datum, typically the runway threshold of an airfield

Answer

Altitude above the reference pressure level 1013.25 hPa

Answer

Magnetic bearing to a station

Answer

Barometric pressure adjusted to sea level, using the international standard atmosphere (ISA)

Question 22

The burst of a hydrogen pressure line may result in what risk?

Accepted Answer

The risk of hydrogen self-igniting and burning with invisible flame

Answer

The risk of hydrogen collecting in the basket and causing breath shortness

Answer

The risk of hydrogen self-igniting and burning with a bright flame

Answer

The risk of hydrogen dissipating to the atmosphere and poisoning the air

Question 23

The term "static pressure" is defined as pressure...

Accepted Answer

Of undisturbed airflow

Answer

Resulting from orderly flow of air particles

Answer

Inside the airplane cabin

Answer

Sensed by the pitot tube

Question 24

The emergency opening of a gas balloon is located where?

Accepted Answer

To the side of the appendix

Answer

At the upper pole

Answer

At the equator

Answer

To the side of the valve

Question 25

A true altitude is...

Accepted Answer

An altitude above mean sea level corrected for non-standard temperature

Answer

A height above ground level corrected for non-standard pressure

Answer

A height above ground level corrected for non-standard temperature

Answer

A pressure altitude corrected for non-standard temperature

Question 26

The vertical speed indicator measures the difference of pressure between...

Accepted Answer

The present static pressure and the static pressure of a previous moment

Answer

The present dynamic pressure and the dynamic pressure of a previous moment

Answer

The present total pressure and the total pressure of a previous moment

Answer

The present dynamic pressure and the static pressure of a previous moment

Question 27

The purpose of the drag lines of the parachute is ...

Accepted Answer

To transfer the force from the pull rope to the parachute

Answer

To transfer the carrying force of the balloon in the top opening area

Answer

To keep the parachute in the center of the top opening

Answer

To transfer the force from the pull rope to the free-balloon hull

Question 28

During a flight in colder-than-ISA air the indicated altitude is...

Accepted Answer

Higher than the true altitude

Answer

Equal to the standard altitude

Answer

Lower than the true altitude

Answer

Equal to the true altitude

Exam simulation Aircraft General Knowledge - Exam BPL Gas - Balloon Pilot License

Exam simulation Gas Balloon Pilot Exam BPL Aircraft General Knowledge 100 questions on 120 minutes