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4

Construction joints are provided

A. Where B.M. and S.F. are small

B. Where the member is supported by other member

C. At 18 m apart in huge structures

D. All the above

Correct Answer :

D. All the above


Related Questions

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The high strength of rapid hardening cement at early stage, is due to its

A. Finer grinding

B. Burning at high temperature

C. Increased lime cement

D. Higher content of tricalcium

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4

For the construction of the retaining structures, the type of concrete mix to be used, is

A. 1 : 3 : 6

B. 1 : 2 : 4

C. 1 : 1 ½ : 3

D. 1 : 4 : 8

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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

Minimum pitch of transverse reinforcement in a column is

A. The least lateral dimension of the member

B. Sixteen times the smallest diameter of longitudinal reinforcement bar to be tied

C. Forty-eight times the diameter of transverse reinforcement

D. Lesser of the above three values

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Curing

A. Reduces the shrinkage of concrete

B. Preserves the properties of concrete

C. Prevents the loss of water by evaporation

D. All of the above

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Allowable shear strength of concrete, depends upon

A. Shear strength

B. Tensile strength

C. Compressive strength

D. None of these

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4

For the construction of thin R.C.C. structures, the type of cement to be avoided, is

A. Ordinary Portland cement

B. Rapid hardening cement

C. Low heat cement

D. Blast furnace slag cement

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4

If a beam fails in bond, then its bond strength can be increased most economically by

A. Increasing the depth of beam

B. Using thinner bars but more in number

C. Using thicker bars but less in number

D. Providing vertical stirrups

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4

Select the correct statement

A. Elastic modulus of high tensile steel is nearly the same as that of mild steel

B. Elastic modulus of high tensile steel is more than that of mild steel

C. Carbon percentage in high carbon steel is less than that in mild steel

D. High tensile steel is cheaper than mild steel

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4

Wp and Wf are the weights of a cylinder containing partially compacted and fully compacted concrete. If the compaction factor (Wp/Wf) is 0.95, the workability of concrete is

A. Extremely low

B. Very low

C. Low

D. High

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4

For preparing ordinary concrete, the quantity of water used, is

A. 5% by weight of aggregates plus 20% of weight of cement

B. 10% by weight of aggregates plus 10% of weight of cement

C. 5% by weight of aggregates plus 30% of weight of cement

D. 30% by weight of aggregates plus 10% of weight of cement

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Too wet concrete may cause

A. Weakness of concrete

B. Excessive laitance

C. Segregation

D. All the above

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4

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 counterfort The correct answer is

A. (i) and (ii),

B. (ii) and (iii)

C. (i) and (iv)

D. (iii) and (iv)

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The compressive strength of 100 mm cube as compared to 150 mm cube is always

A. Less

B. More

C. Equal

D. None of the above

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Pick up the correct statement from the following:

A. Bulking of sand is caused due to formation of a thin film of surface moisture

B. Fine sand bulks more than coarse sand

C. The volume of fully saturated sand, is equal to the volume of dry and loose sand

D. All the above

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4

For batching 1:3:6 concrete mix by volume, the ingredients required per bag of 50 kg cement, are:

A. 70 litres of sand and 120 litres of aggregates

B. 70 kg of sand and 140 litres of aggregates

C. 105 litres of sand and 140 litres of aggregates

D. 105 litres of sand and 210 litres of aggregates

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Construction joints are generally provided in concrete

A. Roads

B. Retaining walls

C. Lining of canals

D. All the above

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4

The bulk density of aggregates, depends upon

A. Shape

B. Grading

C. Compaction

D. All the above

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For a slab supported on its four edges with corners held down and loaded uniformly, the Marcus correction factor to the moments obtained by Grashoff Rankine's theory

A. Is always less than 1

B. Is always greater than 1

C. Can be more than 1

D. Can be less than 1

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4

According to Water-Cement Ratio Law, the strength of workable plastic concrete

A. Depends upon the amount of water used in the mix

B. Does not depend upon the quality of cement mixed with aggregates

C. Does not depend upon the quantity of cement mixed with aggregates

D. All the above

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4

In pre-stressed concrete

A. Forces of tension and compression change but lever arm remains unchanged

B. Forces of tension and compressions remain unchanged but lever arm changes with the moment

C. Both forces of tension and compression as well as lever arm change

D. Both forces of tension and compression as well as lever arm remain unchanged

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4

If X, Y and Z are the fineness modulli of coarse, fine and combined aggregates, the percentage (P) of fine aggregates to combined aggregates, is

A. P = [(Z - X)/(Z - Y)] × 100

B. P = [(X - Z)/(Z - Y)] × 100

C. P = [(X - Z)/(Z + Y)] × 100

D. P = [(Z + X)/(Z - Y)] × 100

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Which of the following R.C. retaining walls is suitable for heights beyond 6 m?

A. L-shaped wall

B. T-shaped wall

C. Counterfort type

D. All of the above

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The minimum cover in a slab should neither be less than the diameter of bar nor less than

A. 10 mm

B. 15 mm

C. 25 mm

D. 13 mm

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According to the recommendations of IS : 456-1978, the expansion joints

A. Are provided where plane changes abruptly

B. Are provided to ensure minimum resistance

C. Do not carry reinforcement across them

D. All the above

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4

The percentage of the aggregate of F.M. 2.6 to be combined with coarse aggregate of F.M. 6.8 for obtaining the aggregates of F.M. 5.4, is

A. 30 %

B. 40 %

C. 50 %

D. 60 %

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Water cement ratio is

A. Volume of water to that of cement

B. Weight of water to that of cement

C. Weight of concrete to that of water

D. Both (a) and (b) of the above

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4

Sands of zone I are:

A. Course

B. Medium

C. Medium to fine

D. Fine

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How long will it take for the concrete to achieve 100% of its strength?

A. 7 days

B. 14 days

C. 21 days

D. 28 days

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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