CONCRETE TECHNOLOGY AND DESIGN OF CONCRETE STRUCTURES QUIZ

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

segregation

bulking

compaction

shrinkage

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If the size of panel in a flat slab is 6m x 6m, then as per Indian Standard Code, the widths of column strip and middle strip are

3.0 m and 1.5 m

1.5 m and 3.0 m

3.0 m and 3.0 m

1.5 m and 1.5 m

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The purpose of reinforcement in pre-stressed concrete is

To resist tensile stresses

To provide adequate bond stress

To impart initial compressive stress in concrete

All of these

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

directly proportional to compressive strength

inversely proportional to square root of compressive strength

inversely proportional to compressive strength

directly proportional to square root of compressive strength

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1% of voids in a concrete mix would reduce its strength by about

20%

5%

15%

10 %

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According to IS : 456- 1978, minimum slenderness ratio for a short column is

less than 18

less than 12

between 18 and 24

more than 24

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If the storey height is equal to length of RCC wall, the percentage increase in strength is

10

20

30

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Workability of concrete is inversely proportional to

size of aggregate

the air in the mix

time of transit

vater-cement ratio

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If nominal shear stress tv exceeds the design shear strength of concrete xc, the nominal shear reinforcement as per IS : 456-1978 shall be provided for carrying a shear stress equal to

Tv + Tc

xv

xc

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Modulus of rupture of concrete is a measure of

flexural tensile strength

compressive strength

split tensile strength

direct tensile strength

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