1.

The maximum efficiency of a screw jack is

A. 1 – sinφ/ 1 + sinφ
B. 1 + sinφ/ 1 – sinφ
C. 1 – tanφ/ 1 + tanφ
D. 1 + tanφ/ 1 – tanφ
Answer» B. 1 + sin‚âà√¨‚àö√∫/ 1 ‚Äö√Ñ√∂‚àö√ë‚àö¬® sin‚âà√¨‚àö√∫


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