Question

1. when loading cameras or other equipment on an suas, mount the items in a manner that

oa. is visible to the visual observer or other crewmembers.
ob. does not adversely affect the center of gravity.
oc. can be easily removed without the use of tools.

1. if you bring an suas that was registered in another country to operate in the u.s. under part 107 you must

oa. de - register it in that country and register it in the u.s.
ob. keep it registered in that country and also register it in the u.s.
oc. obtain a foreign aircraft permit.

Explanation:

For question 39, when mounting items on an sUAS (small Unmanned Aircraft System), the center - of - gravity is crucial for flight stability. Adversely affecting it can lead to flight hazards. Option A about visibility is not the primary concern for mounting in terms of flight safety. Option C about easy removal without tools is not the main requirement compared to center - of - gravity.
For question 40, according to FAA (Federal Aviation Administration) regulations under Part 107, if an sUAS registered in another country is brought to the U.S. for operation, it must be registered in the U.S. while keeping its registration in the original country. De - registering in the original country (Option A) is not required. Obtaining a Foreign Aircraft Permit (Option C) is not the correct procedure for sUAS under Part 107.

Answer:

1. B. does not adversely affect the center of gravity.
2. B. keep it registered in that country and also register it in the U.S.