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In prestressed concrete | |
A. | forces of tension and compression change but lever arm remains unchanged [Wrong Answer] |
B. | forces of tension and compressions remain unchanged but lever arm changes with the moment [Correct Answer] |
C. | both forces of tension and compres-sion as well as lever arm change [Wrong Answer] |
D. | both forces of tension and compres-sion as well as lever arm remain unchanged [Wrong Answer] |