One of the determining factors regulating the time interval for drawing a vessel's tailshaft depends upon the design to reduce stress concentrations. Which of the following factors, in part, would be considered to meet this design criteria?

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Accepted Answer

Stress relief grooves at the forward end of the propeller and aft end of the liner.

Answer

Sprocketed keyway and slotted key.

Answer

Keyway is to be cut so as to give a sharp rise from the bottom of the keyway to the shaft surface.

Answer

All of the above.

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