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Sand requiring a high water cement ratio, belongs to

A. Zone I

B. Zone II

C. Zone III

D. Zone IV

Correct Answer :

A. Zone I


Related Questions

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Pick up the correct statement from the following:

A. According to the petrological characteristics, concrete aggregates are classified as heavy weight, normal weight and light weight

B. According to the shape of the particles, concrete aggregates are classified as rounded irregular, angular and flaky

C. According to the surface texture of the particles, the concrete aggregates are classified as glassy, smooth, granular, rough, crystalline, honey combed and porous

D. All the above

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The cement becomes useless if its absorbed moisture content exceeds

A. 1 %

B. 2 %

C. 3 %

D. 5 %

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Finer grinding of cement

A. Affects only the early development of strength

B. Affects only the ultimate strength

C. Both (A) and (B)

D. Does not affect the strength

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If fineness modulus of sand is 2.5, it is graded as

A. Very fine sand

B. Fine sand

C. Medium sand

D. Coarse sand

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Concrete gains strength due to

A. Chemical reaction of cement with sand and coarse aggregates

B. Evaporation of water from concrete

C. Hydration of cement

D. All the above

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Modulus of rupture of concrete is a measure of

A. Flexural tensile strength

B. Direct tensile strength

C. Compressive strength

D. Split tensile strength

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4

Pick up the incorrect statement from the following:

A. Space between the exterior walls of a warehouse and bag piles should be 30 cm

B. Cement bags should preferably be piled on wooden planks

C. Width and height of the pile should not exceed 3 m and 2.70 m respectively

D. None of these

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4

Cement used for normal concrete construction, is obtained by burning a mixture of

A. Siliceous and argillaceous materials

B. Argillaceous and calcareous materials

C. Siliceous and calcareous materials

D. Siliceous, argillaceous and calcareous materials

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4

Normally pre-stressing wires are arranged in the

A. Upper part of the beam

B. Lower part of the beam

C. Center

D. Anywhere

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4

In the design of a front counterfort in a counterfort retaining wall, the main reinforcement is provided on (i) Bottom face near counterfort (ii) Top face near counterfort (iii) Bottom face near centre of span (iv) Top face near centre of span The correct answer is

A. Only (i)

B. Only (ii)

C. Both (i) and (iv)

D. Both (ii) and (iii)

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4

The final operation of finishing floors, is known as

A. Screeding

B. Floating

C. Trowelling

D. Finishing

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4

Pick up the correct statement from the following:

A. Segregation is necessary for a workable concrete

B. Consistency does not affect the workability of concrete

C. If the concrete mix is dry, the slump is maximum

D. None of these

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Water required per bag of cement, is

A. 7 kg

B. 14 kg

C. 21 kg

D. 35 kg

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4

If the depth of actual neutral axis in a beam is more than the depth of critical neutral axis, then the beam is called

A. Balanced beam

B. Under-reinforced beam

C. Over-reinforced beam

D. None of the above

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4

If a grading curve is horizontal between the portions of 20 mm I.S. Sieve and 4.75 mm I.S. Sieve, the graded aggregates do not contain

A. 20 mm particles

B. 10 mm particles

C. 4.75 mm particles

D. All the above

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The commercial name of white and coloured cement in India, is

A. Colorcrete

B. Silvicrete

C. Snowcem

D. All the above

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The aggregate containing moisture in pores and having its surface dry, is known as

A. Moist aggregates

B. Very dry aggregates

C. Dry aggregates

D. Saturated surface dry aggregate

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4

Ratio of permissible stress in direct compression and bending compression is

A. Less than 1

B. Between 1 and 1.5

C. Between 1.5 and 2.0

D. Greater than 2

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4

Pick up the correct statement from the following:

A. The maximum size of a coarse aggregate, is 75 mm and minimum 4.75 mm

B. The maximum size of the fine aggregate, is 4.75 mm and minimum 0.075 mm

C. The material having particles of size varying from 0.06 mm to 0.002 mm, is known as silt

D. All the above

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4

Pick up the incorrect statement from the following:

A. The bottom and top ends of slump mould are parallel to each other

B. The axis of the mould is perpendicular to the end faces

C. The internal surface of the mould is kept clean and free from set cement

D. The mould is in the form of a frustum of hexagonal pyramid

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After casting, an ordinary cement concrete on drying

A. Expands

B. Mix

C. Shrinks

D. None of these

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4

The percentage of reinforcement in case of slabs, when high strength deformed bars are used is not less than

A. 0.15

B. 0.12

C. 0.30

D. 1.00

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To obtain a very high strength concrete, use very fine grained

A. Granite

B. Magnetite

C. Barite

D. Volcanic scoria

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Bulking of sand is maximum if moisture content is about

A. 2 %

B. 4 %

C. 6 %

D. 10 %

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Internal friction between the ingredients of concrete, is decreased by using

A. Less water

B. Fine aggregates

C. Rich mix

D. More water and coarse aggregates

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The commonly used material in the manufacture of cement is

A. Sand stone

B. Slate

C. Lime stone

D. Graphite

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

A. 0

B. 10

C. 20

D. 30

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For a concrete mix 1:3:6 and water cement ratio 0.6 both by weight, the quantity of water required per bag, is

A. 10 kg

B. 12 kg

C. 14 kg

D. 16 kg

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4

For a cantilever of effective depth of 0.5 m, the maximum span to satisfy vertical deflection limit is

A. 3.5 m

B. 4 m

C. 4.5 m

D. 5 m

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4

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

A. fcr - fcs = fcl

B. fcr > fcs > fcl

C. fcr < fcs < fcl

D. fcs > fcr > fcl