I would assume when it is cleanly severed.
Provided that you are talking about the same measurement of the opening: When it is crushed and torn there are ragged edges that hold blood clots easier, also the additional damage to the surrounding tissues and blood vessels would cause an inflammatory reaction faster.
Answer
Severed would be quicker, but if you could get to it quickly you may be saved. A crush one would be slower I should Imagine but harder to fix.
If it is cut clean there is nothing stopping the blood from coming out even the slightest it'll be like a hose if not patched up. The reason a person may live or live longer with a crushed and torn artery is because it crushed is not broken while it being raggedly can by patched up by the blood cells easily cause it can catch on to something.
Because when the artery is cleanly severed there is less area for your blood to clot
A cleanly severed artery does not have the necessary surface area for platelet formation. The edges are too smooth for the needed platelets to become attached.
Which coronary artery is most likely occluded
Nonmetal.
metal
A structural problem on a submarine may make it possible for that vessel to be crushed as it descends. It may or may not be likely to be crushed, and that would depend on the nature of the problem and how deep the submarine descended.
No. A vein is more likely to collapse.
It depends on the severity of the cut. If you cut an artery, you are more likely to die, or at least more quickly.
NO
elements that is soft and easy to cut cleanly with a knife likely to be metal or a nonmetal
vision
The likely word is "aorta" (the main artery leading from the heart).
along the walls
11 blade