CONCRETE TECHNOLOGY AND DESIGN OF CONCRETE STRUCTURES QUIZ

45 m

30 m

20 m

60 m

does not show definite yield point but yield point is defined by 0.1% proof stress

does not show definite yield point but yield point is defined by 2% proof stress,

has a definite yield point

does not show definite yield point but yield point is defined by 0.2% proof stress

(i) and (ii)

only (i)

(i) and (iii)

(i), (ii) and (iii)

angular

rounded

All of these

elongated

about 1.0 N/mm²

zero

about 0.1 N/mm²

0.3 N/mm² to 0.7 N/mm²

1/6

1/8

1/4

1/5

wholly rectangular

wholly parabolic

parabolic above neutral axis and rectangular below neutral axis

rectangular above neutral axis and parabolic below neutral axis

accelerators

workability admixtures

air entraining agents

retarders

None of these

steel and concrete are same

steel is lower than that for concrete

steel is higher than that for concrete

only in post-tensioned beams

only in pretensioned beams

None of these

in both post-tensioned and preten-sioned beams