A hammer is robust enough that it doesn't require any special care.
No. Installing an anti-hammer arrestor in water line will take care of water hammer.
water hammer and not being strapped down properly.
by clening it
you can find water hammer In plumbing that is not fastened properly. Water hammer is not an "It" Its the sound made when water is turned off suddenly and the loosely fastened pipes make a banging sound.
Just don't hit it with a hammer and you'll be fine.
yes you can very properly care for them in an apartment
clean it and hang it
Neglect- Fail to care for properly
You would have to describe what YOU consider to be a significant risk. -I use hammer drills frequently and do not see "significant risks" if the tool is used properly.
To properly care for plumeria cuttings, plant them in well-draining soil, keep them in a warm and sunny location, water them sparingly, and protect them from frost.
You need a gunsmith
As many as you can properly care for.