Units, Interpolation and the Digits You Don't Have
Somebody sends you that line about a pump nozzle and asks whether it passes.
Guess first: does it?
You cannot know, and neither could they. 3 500 N·m against 2.8 kN·m is a 25 % overload ; 3 500 N·m against 2.8 kN·m … is the same thing said twice; 3 500 lbf·ft against 2.8 kN·m passes with room to spare. A number without a unit is not an answer, it is a rumour — and the reason this keeps happening is that both people involved know perfectly well how to convert. The knowledge did not go; the habit went.
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