CONCRETE TECHNOLOGY AND DESIGN OF CONCRETE STRUCTURES QUIZ

both (i) and (iv)

only (ii)

both (ii) and (iii)

only (i)

Lean mixes bleed more as compared to rich ones.

Bleeding can be increased by addition of calcium chloride.

Bleeding can be minimized by adding pozzuolana finer aggregate.

None of these

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.

depends on aCbC only

(ii) and (iii)

(i) and (iv)

(i) and (iii)

(ii) and (iv)

150 mm

100 mm

250 mm

200 mm

100 mm

50 mm

75 mm

120 mm

(ii) and (iii)

(ii) and (iv)

(i) and (iii)

(i) and (iv)

0.8% to 6%

0.8% to 4%

0.8% to 8%

0.15% to 2%

decreased by 10% for bars in compression

increased by 10% for bars in compression

decreased by 25% for bars in compression

increased by 25% for bars in compression

is always less than 1

can be more than 1

can be less than 1

is always greater than 1