Answer Key: Pretest Module 3

Weather & Aerodynamic Performance

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Question 1: Correct Answer is A

Decreased performance and reduced propeller/motor efficiency

Explanation: High density altitude (thin air) reduces aerodynamic lift and motor efficiency.

Question 2: Correct Answer is A

Broken sky cover at 2,500 feet Above Ground Level (AGL)

Explanation: "BKN" stands for broken clouds, and "025" indicates 2,500 feet AGL.

Question 3: Correct Answer is A

An increased stall speed and sluggish maneuver response

Explanation: Overloading a craft increases stall speed and negatively alters its center of gravity.

Question 4: Correct Answer is B

Low-level wind shear and thermal mechanical turbulence

Explanation: Surface heating over open terrain generates severe mechanical turbulence affecting light aircraft.

Question 5: Correct Answer is B

Sudden thermal runaway, fire, or catastrophic explosion hazard

Explanation: Damaged or swollen LiPo batteries carry a high risk of violent internal short-circuiting and fire.