Aircraft General Knowledge - Quiz BPL Gas - Balloon Pilot License

Question 1

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 2

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 3

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 4

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 5

Which instrument can be affected by the hysteresis error?

Accepted Answer

Altimeter

Answer

Tachometer

Answer

Vertical speed indicator

Answer

Direct reading compass

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

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 8

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 9

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 10

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

Accepted Answer

Embedded steel threads (filiaments).

Answer

Wrapping with plastic tape.

Answer

A surface painting

Answer

Impregnation of the ropes

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