CONCRETE TECHNOLOGY AND DESIGN OF CONCRETE STRUCTURES QUIZ

Examine the following statements :<br/>i) Factor of safety for steel should be based on its yield stress,<br/>ii) Factor of safety for steel should be based on its ultimate stress,<br/>iii) Factor of safety for concrete should be based on its yield stress,<br/>iv) Factor of safety for concrete should be based on its ultimate stress.<br/>The correct statements are

(ii) and (iii)

(ii) and (iv)

(i) and (iv)

(i) and (iii)

TRUE ANSWER : ?
YOUR ANSWER : ?

For walls, columns and vertical faces of all structural members, the form work is generally removed after

14 days

3 days

24 to 48 hours

7 days

TRUE ANSWER : ?
YOUR ANSWER : ?

Workability of concrete is directly proportional to

Aggregate cement ratio

All of above

Time of transit

Grading of the aggregate

TRUE ANSWER : ?
YOUR ANSWER : ?

Bulking of sand is maximum if moisture content is about

7%

4%

6%

5%

TRUE ANSWER : ?
YOUR ANSWER : ?

The relation between modulus of rupture fcr, splitting strength fcs and direct tensile strength fcl is given by

fcr>fcs>fc.

fcr

tcr – rcs = tct

fc5>fcr>fC

TRUE ANSWER : ?
YOUR ANSWER : ?

The permissible diagonal tensile stress in reinforced brick work is

about 1.0 N/mm²

0.3 N/mm² to 0.7 N/mm²

about 0.1 N/mm²

zero

TRUE ANSWER : ?
YOUR ANSWER : ?

Approximate value of shrinkage strain in concrete, is

0.03

0.0003

3.0E-5

0.003

TRUE ANSWER : ?
YOUR ANSWER : ?

The property of the ingredients to separate from each other while placing the concrete is called

bulking

shrinkage

compaction

segregation

TRUE ANSWER : ?
YOUR ANSWER : ?

In a counterfort retaining wall, the main reinforcement in the stem at mid span is provided on

inner face only

None of these

front face only

both front face and inner face

TRUE ANSWER : ?
YOUR ANSWER : ?

For a reinforced concrete section, the shape of shear stress diagram is

wholly parabolic

parabolic above neutral axis and rectangular below neutral axis

rectangular above neutral axis and parabolic below neutral axis

wholly rectangular

TRUE ANSWER : ?
YOUR ANSWER : ?

↑