Aircraft General Knowledge - Quiz BPL Gas - Balloon Pilot License

Question 1

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 2

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 3

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 poisening the air

Question 4

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 5

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 6

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 7

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 8

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 9

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 10

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

Accepted Answer

Static pressure.

Answer

Dynamic pressure.

Answer

Differential pressure.

Answer

Total pressure.

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