CONCRETE TECHNOLOGY AND DESIGN OF CONCRETE STRUCTURES QUIZ

10 to 15% more

20 to 25% more

15 to 20% more

25 to 50% more

0.75 - 0.80

0.85 - 0.92

0.75 - 0.80

Above 0.92

the inner face in both directions

the inner face in one direction

the front face in both directions

the front face in one direction

tensile stress

bond stress

compressive stress

shear stress

Pretensioning system has greater certainty about its durability.

None of these

The loss of prestress is more in pre-tensioning system than in post-tensioning system.

For heavy loads and large spans in buildings or bridges, post-tensioning system is cheaper than pretensioning system

the effects of temperature variations

strength

workability

the unit weight

10

20

30

0.8% to 4%

0.8% to 6%

0.15% to 2%

0.8% to 8%

Lean mixes bleed more as compared to rich ones.

None of these

Bleeding can be increased by addition of calcium chloride.

Bleeding can be minimized by adding pozzuolana finer aggregate.

one end fixed and other end free

one end fixed and other end hinged

both ends fixed

both ends hinged