Q. If the friction is neglected, then

  • (A) vr1 > vr2
  • (B) vr1 < vr2
  • (C) vr1 = vr2
  • (D) vr1 is a zero
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✅ Correct Answer: (C) vr1 = vr2
Explanation: the relative velocity of the jet is denoted as vr1. it is the relative velocity at the inlet to the vane. relative velocity of inlet to the vane is obtained by subtracting vectorially the velocity of the vane with its absolute velocity. it happens in the same way for vr2. thus, if the friction is neglected, then vr1 = vr2.

Published by Mr. Dubey ⭐ 111.54K Points at 19-Sep-2023 08:23 pm in Fluid Mechanics and Machinery

Explanation by: Mr. Dubey
the relative velocity of the jet is denoted as vr1. it is the relative velocity at the inlet to the vane. relative velocity of inlet to the vane is obtained by subtracting vectorially the velocity of the vane with its absolute velocity. it happens in the same way for vr2. thus, if the friction is neglected, then vr1 = vr2.

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