[2022] Kleber torpedo tubes

These would add together in a multiplicative fashion:

1 x .8 x .7 combines to a 44% reduction in Incap chance.

When you say "knocked out" do you mean broken permanently? Each Module has a set amount of HP associated with it, so if the module takes enough damage it can break outright.

This video discusses Module Health/Interactions:

I believe Magazines have a 0% chance of being criticaled if HP > 75%, but I'm not aware of any further relation between HP and a module being Critical'd.

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When HP is deleted, the module is destroyed. Critical Hits can incap modules which still have HP remaining.

From the Wiki: https://wiki.wargaming.net/en/Ship:Modules