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Question 9-1 : Maintenance and record keeping. for technical record keeping of a drone, you do not have to note ? [ Level remote ]

The total flight hour of your aircraft since the first flight.



Question 9-2 : Electric motors propulsion...the abbreviation corresponding to an engine that is not turning in a clockwise direction is ?

Ccw..

exemple 13: Ccw.
Cw. dc. ac.

Question 9-3 : Electric motors propulsion...the abbreviation corresponding to an engine that is turning in a clockwise direction is ?

Cw..

exemple 17: Cw.
Ccw. ac. dc.

Question 9-4 : Electric motors propulsion...the abbreviations cw and ccw for an electrical engine mean respectively ?

Clockwise and counter clockwise directions..

exemple 21: Clockwise and counter clockwise directions.
Counter-clockwise and clockwise directions. direct current and alternating current. alternating current and direct current.

Question 9-5 : Electric motors propulsion...an electric motor brushless of 450 kv powered with a voltage of 24 volts will rotate at ?

10800 rpm..

Rpm = round per minute
exemple 25: 10800 rpm.
450 rpm. 18.75 rpm. 900 rpm.

Question 9-6 : Batteries...connecting two 6 v / 5 ah capacity batteries in series will result in a total voltage and capacity respectively of ?

12 v / 5 ah.

V = volt.ah = ampere hour
exemple 29: 12 v / 5 ah
24 v / 10 ah 12v / 24 ah 6 v / 5 ah

Question 9-7 : Batteries...the connection in parallel of two 6 volt / 5 amp.hours batteries, will create a unit with the following characteristics ?

6 v / 10 ah..

exemple 33: 6 v / 10 ah.
6 v / 5 ah. 12 v / 5 ah. 12 v / 10 ah.

Question 9-8 : Batteries...'4s' is written of a lipo battery, it indicates ?

The number of cells in series..

exemple 37: The number of cells in series.
Its power in watt. the c rating in ampere. its voltage in charge.

Question 9-9 : Batteries...the capacity of a battery of ?

5 ah is 5 ampere during 1 hour..

exemple 41: 5 ah is 5 ampere during 1 hour.
20 ah is 20 ampere during 20 hours. 20 ah is 20 ampere during 10 hours. 10 ah is 20 ampere during 10 hours.

Question 9-10 : Batteries...the capacity of a battery is the ?

Amount of ampere hours that a fully charged battery can supply..

exemple 45: Amount of ampere hours that a fully charged battery can supply.
Number of cycles (charging and discharging) that a battery can withstand without deterioration of its cells. no-load voltage of the battery multiplied by its rated output current. intensity withstood by the battery during charging.

Question 9-11 : Batteries...the capacity of a battery is given in ?

Ampere hours..

exemple 49: Ampere hours.
Amperes/volts. watts. ohms.

Question 9-12 : Batteries...voltage of a battery is expressed in ?

Volt..

exemple 53: Volt.
Ampere. watt. ohm.

Question 9-13 : Batteries...associated value to the c letter of a lipo battery indicates ?

The maximum continuous discharge rate of the battery..

exemple 57: The maximum continuous discharge rate of the battery.
The maximum load in volt. the minimum load in volt. intensity of one cell.

Question 9-14 : Batteries...the term lipo means ?

Lithium polymer..

Question 9-15 : Batteries...when carrying out a battery condition check using the aircraft's voltmeter ?

A load should be applied to the battery in order to give a better indication of condition..


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