CONCRETE TECHNOLOGY AND DESIGN OF CONCRETE STRUCTURES QUIZ

0.57 fy

0.37 fy

0.87 fy

0.67 fy

Aggregate cement ratio

Grading of the aggregate

Time of transit

All of above

depends on aCbC only

depends on both crst and acbc

depends on as, only

is independant of both ast and acbc where d is the effective depth, ast is per-missible stress in steel in tension and ocbc is permissible stress in concrete in bending compression.

is always less than 1

can be more than 1

can be less than 1

is always greater than 1

(ii) and (iii)

(i) and (iv)

(ii) and (iv)

(i) and (iii)

both forces of tension and compres-sion as well as lever arm change

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 remain unchanged

forces of tension and compression change but lever arm remains unchanged

7%

5%

6%

4%

More than 5 mm and also more than one-fourth of diameter of main bar

More than or equal to 5 mm

More than 5 mm but less than one-fourth of diameter of main bar

More than or equal to one fourth of diameter of main bar

equal

more

less

None of these

time of transit

vater-cement ratio

the air in the mix

size of aggregate