A2 CofC Pre-Flight Checks & Battery Safety

Question 1

Which of the following is the correct sequence for a drone pre-flight check?

Accepted Answer

Check aircraft, battery, propellers, remote controller, then airspace and environment

Answer

A structured pre-flight check should cover the physical aircraft (frame, motors, propellers), battery state, remote controller, and then environmental/airspace factors. This sequence mirrors standard aviation practice and minimises risk of mechanical failure during flight.

Question 2

What is the recommended minimum battery charge level before beginning a drone flight?

Accepted Answer

At or above the manufacturer's recommended minimum, typically 100% for planned flights

Answer

Best practice is to begin each flight with a fully charged battery (or as close to the manufacturer's recommendation as possible). Battery capacity decreases with age and in cold weather, so starting fully charged provides the maximum safety margin and flight time.

Question 3

What is a LiPo (Lithium Polymer) battery's most important storage requirement when not in use for more than a few days?

Accepted Answer

Store at approximately 50–60% charge (storage voltage) in a cool, dry place

Answer

LiPo batteries should be stored at a 'storage voltage' of approximately 3.8 V per cell (around 50–60% charge). Storing fully charged or fully depleted degrades cell chemistry and reduces battery life. Many modern chargers have an automatic storage charge mode.

Question 4

What visual sign indicates a LiPo battery is damaged and should not be used?

Accepted Answer

Swelling or puffing of the battery casing

Answer

A swollen (puffy) LiPo battery has undergone internal gas formation due to cell damage or degradation. This is a serious fire hazard — swollen batteries must be removed from service immediately, safely discharged, and disposed of at an appropriate facility.

Question 5

Before every flight, a pilot should check the propellers for which of the following?

Accepted Answer

Cracks, chips, warping, and secure attachment

Answer

Propeller inspection should check for any physical damage (cracks, chips, delamination), warping, and that they are securely and correctly fitted. A damaged or loose propeller can cause loss of control or in-flight failure, making this one of the most critical pre-flight checks.

A2 CofC Drone Practice Test

A2 CofC Drone Practice Test

A2 CofC Pre-Flight Checks & Battery Safety