No – multi-part RAR archives are indivisible. You cannot extract a specific internal file without downloading and extracting the entire set.
, it is a "split archive." You will need all subsequent parts (e.g., .part2.rar .part3.rar
Yes – if the original file was split into exactly two parts. The last part ( .part2.rar ) will likely be smaller than the first because it contains only the remaining bytes.
The naming convention for split RAR archives is:

