The piston rod of a steam engine is usually connected to the cross-he

1.	The piston rod of a steam engine is usually connected to the cross-head by means of
A.	Bolted joint
B.	Knuckle joint
C.	Cotter joint
D.	Universal joint
Answer» D. Universal joint

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The piston rod of a steam engine is usually connected to the cross-head by means of

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