CONCRETE TECHNOLOGY AND DESIGN OF CONCRETE STRUCTURES QUIZ

According to IS : 456-1978, the fiexural strength of concrete is

directly proportional to square root of compressive strength

inversely proportional to square root of compressive strength

inversely proportional to compressive strength

directly proportional to compressive strength

TRUE ANSWER : ?
YOUR ANSWER : ?

In a ring beam subjected to uniformly distributed load<br/>i) shear force at mid span is zero<br/>ii) shear force at mid span is maximum<br/>iii) torsion at mid span is zero<br/>iv) torsion at mid span is maximum<br/>The correct answer is

(ii) and (iv)

(i) and (iii)

(ii) and (iii)

(i) and (iv)

TRUE ANSWER : ?
YOUR ANSWER : ?

In a counterfort retaining wall, the main reinforcement is provided on the i) bottom face in front counterfort ii) inclined face in front counterfort iii) bottom face in back counterfort iv) inclined face in back counterEort The correct answer is

(ii) and (iii)

(i) and (iv)

(iii) and (iv)

(i) and (ii),

TRUE ANSWER : ?
YOUR ANSWER : ?

A beam curved in plan is designed for

bending moment and torsion

shear and torsion

bending moment, shear and torsion

bending moment and shear

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In a spherical dome the hoop stress due to a concentrated load at crown is

partly compressive and partly tensile

compressive everywhere

tensile everywhere

zero

TRUE ANSWER : ?
YOUR ANSWER : ?

Bulking of sand is maximum if moisture content is about

6%

4%

5%

7%

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YOUR ANSWER : ?

The depth of footing for an isolated column is governed by<br/>i) maximum bending moment<br/>ii) shear force<br/>iii) punching shear<br/>The correct answer is

(i), (ii) and (iii)

only (i)

(i) and (ii)

(i) and (iii)

TRUE ANSWER : ?
YOUR ANSWER : ?

In counterfort type retaining wallsi) the vertical slab is designed as a continuous slabii) the heel slab is designed as a continuous slabiii) the vertical slab is designed as a cantileveriv) the heel slab is designed as a cantileverThe correct answer is

(iii) and (iv)

(ii) and (iii)

(i) and (iv)

(i) and (ii)

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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

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In prestressed concrete

forces of tension and compressions remain unchanged but lever arm changes with the moment

forces of tension and compression change but lever arm remains unchanged

both forces of tension and compres-sion as well as lever arm change

both forces of tension and compres-sion as well as lever arm remain unchanged

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