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Q. |
A jack having 2 cm as the diameter of the screw at the root of the thread, may be expected to safely lift a load of about |
A. | 25 to 30 tonnes |
C. | 5 to 7 tonnes |
D. | 35 to 40 tonnes |
E. | 40 to 50 tonnes |
Answer» C. 5 to 7 tonnes |
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