CONCRETE TECHNOLOGY AND DESIGN OF CONCRETE STRUCTURES QUIZ

250 mm

200 mm

100 mm

150 mm

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

Pretensioning system has greater certainty about its durability.

the inner face in both directions

the inner face in one direction

the front face in one direction

the front face in both directions

one cantilever

four cantilevers

three cantilevers

two cantilevers

None of these

Deflect upward

Deflect downward

Deflect downward or upward

2.0 to 3.5

6.0 to 8.5

5.0 to 7.0

3.5 to 5.0

fcr

tcr – rcs = tct

fc5>fcr>fC

fcr>fcs>fc.

Using high strength steel

Increasing the depth

Providing shear reinforcement

Using thinner bars but more in number

0.0003

0.003

0.03

3.0E-5

3

2.5

1.5

2