Practice question

What are the standard rotational speeds for agricultural tractor PTO (Zapfwelle) shafts?

  1. 1,000 rpm and 1,500 rpm
  2. 440 rpm and 750 rpm
  3. 540 rpm and 1,000 rpm, each also available as an economy (E) setting
  4. 540 rpm and 2,000 rpm

Answer: C — 540 rpm and 1,000 rpm, each also available as an economy (E) setting

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