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Question
A hollow saddle key is
Options:
A .  A taper key which fits half in the key way of hub and half in the key way of shaft
B .  A taper key which fits in a key way of the hub and is flat on the shaft
C .  A taper key which fits in a key way of the hub and the bottom of the key is shaped to fit the curved surface of the shaft
D .  Provided in pairs at right angles and each key is to withstand torsion in one direction only
Answer: Option C

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