Concrete Technology and Design of Concrete Structures
As compared to ordinary portland cement, high alumina cement has

lower initial setting time but higher final setting time
higher initial setting time but lower final setting time
lower initial and final setting times
higher initial and final setting times

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Concrete Technology and Design of Concrete Structures
In prestressed concrete

forces of tension and compression change but lever arm remains unchanged
forces of tension and compressions remain unchanged but lever arm changes with the moment
both forces of tension and compres-sion as well as lever arm change
both forces of tension and compres-sion as well as lever arm remain unchanged

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