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Which element gives a torque converter its multiplication?

  • A.The impeller
  • B.The lock-up clutch, which connects the impeller directly to the turbine and therefore eliminates the slip losses
  • C.The stator
  • D.The turbine, whose curved blades reverse the direction of the oil and therefore increase the torque delivered

Answer: C

The stator redirects oil leaving the turbine so that it rejoins the impeller helpfully rather than opposing it, and the reaction torque is added to the output. Without a stator the device is a fluid coupling with no multiplication at all. Most errors here come from carrying across a result from a neighbouring case where it does not hold. Working the distinction through on a single concrete case fixes it more firmly than any rule of thumb. Most errors here come from carrying a result across from a neighbouring case where it does not hold.

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