The condilion for a lifting machine to be reversible is that its effic – McqOptions

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1.	The condilion for a lifting machine to be reversible is that its efficiency should be_________________?
A.	less than 50%
B.	more than 50%
C.	more than 66.67%
D.	equal to 100%
Answer» C. more than 66.67%

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