medium
During preflight inspection of a small unmanned aircraft system, the remote pilot observes that one of the lithium-polymer batteries is swollen. This condition indicates a high risk of what system failure mode?
medium
Which of the following is a recommended practice for safely charging lithium-polymer batteries used in small unmanned aircraft systems (sUAS)?
hard
Lithium batteries in small unmanned aircraft systems can enter a state of thermal runaway due to factors such as physical damage, overcharging, or manufacturing defects. What is the primary systems-level hazard that results from thermal runaway?
medium
Which of the following is a recommended best practice for safely charging lithium-polymer batteries used in small unmanned aircraft systems?
easy
For safe transportation of lithium batteries used in small unmanned aircraft systems, what must the remote pilot in command ensure?
hard
While operating a small unmanned aircraft 4 statute miles from the nearest suitable landing site, the remote pilot observes 15% battery capacity remaining. The aircraft cruises at 35 miles per hour (mph) and consumes battery at an average rate of 3% per minute. Approximately how much flight time remains before depletion, and what is the MOST APPROPRIATE immediate action per emergency procedures?