CONCRETE TECHNOLOGY AND DESIGN OF CONCRETE STRUCTURES QUIZ

Grading of the aggregate

Time of transit

Aggregate cement ratio

All of above

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.

depends on aCbC only

depends on both crst and acbc

depends on as, only

about 1.0 N/mm²

zero

0.3 N/mm² to 0.7 N/mm²

about 0.1 N/mm²

None of these

balanced beam

under-reinforced beam

over-reinforced beam

more than 24

less than 18

between 18 and 24

less than 12

both front face and inner face

inner face only

front face only

None of these

increases with increase in diameter of bar

does not depend on diameter of bar

decreases with increase in diameter of bar

None of these

Providing shear reinforcement

Using thinner bars but more in number

Using high strength steel

Increasing the depth

(ii) and (iii)

All (i), (ii) and (iii)

only (iii)

(i) and (ii)

only (iii)

All (i), (ii) and (iii)

(i) and (ii)

(ii) and (iii)