UAS Maintenance 4

Question 1

Which log data should an operator review to diagnose a sudden loss of altitude during a previous flight?

Accepted Answer

Throttle, motor RPM, and barometer logs

Answer

Reviewing throttle commands, motor RPM, and barometer logs together reveals whether the altitude loss was caused by power, motor, or sensor issues.

Question 2

What condition indicates that a UAS airframe arm needs replacement rather than repair?

Accepted Answer

A crack propagating through the full cross-section of the arm

Answer

A crack propagating through the full cross-section means the arm has lost structural integrity and poses a collapse risk, requiring full replacement.

Question 3

Why is it important to check for water or moisture inside the UAS after flying in high-humidity conditions?

Accepted Answer

Moisture causes corrosion on connectors and can short electronic components

Answer

Moisture causes corrosion on electrical connectors and can create short circuits that damage electronic components or cause in-flight failures.

Question 4

What is the correct method to clean UAS camera lenses in the field?

Accepted Answer

Blow with compressed air then wipe with a microfiber lens cloth

Answer

Blowing with compressed air first removes loose particles that could scratch the lens, then a microfiber cloth safely removes remaining smudges.

Question 5

When conducting a pre-flight control surface check on a fixed-wing UAS, what is the operator verifying?

Accepted Answer

That control surfaces respond correctly in direction and range of motion

Answer

Pre-flight control surface checks verify that each surface responds correctly to control inputs in the right direction and through the full expected range of motion.

(UAS) Unmanned Aircraft Systems Certified Practice Test

(UAS) Unmanned Aircraft Systems Certified Practice Test

UAS Maintenance 4