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4

Horizontal construction joints in concrete walls are generally provided at

A. Soffit level

B. Window sill level

C. Floor level

D. All the above

Correct Answer :

D. All the above


Related Questions

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4

A concrete having a slump of 6.5 cm, is said to be

A. Dry

B. Earth moist

C. Semi-plastic

D. Plastic

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4

Under normal conditions using an ordinary cement, the period of removal of the form work, is:

A. 7 days for beam soffits

B. 14 days for bottom slabs of spans 4.6 m and more

C. 21 days for bottom beams over 6 m spans

D. All the above

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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

The process of mixing, transporting, placing and compacting concrete using Ordinary Port land Cement should not take more than

A. 30 minutes

B. 40 minutes

C. 60 minutes

D. 90 minutes

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4

To ensure constant moisture content in aggregates

A. Area of each aggregate pile should be large

B. Height of each aggregate pile should not exceed 1.50 m

C. Aggregate pile should be left for 24 hours before aggregates are used

D. All the above

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4

Permissible compressive strength of M 300 concrete grade is

A. 100 kg/cm2

B. 150 kg/cm2

C. 200 kg/cm2

D. 300 kg/cm2

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4

Approximate value of shrinkage strain in concrete, is

A. 0.003

B. 0.0003

C. 0.00003

D. 0.03

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4

Joints in concrete structures, are provided

A. To reduce the tensile stresses likely to be developed due to evaporation of water

B. To minimise the change in the dimensions of the slab

C. To minimise the necessary cracking

D. All the above

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4

For an ordinary Portland cement

A. Residual does not exceed 10% when sieved through IS Sieve No. 9

B. Soundness varies from 5 to 10 mm

C. Initial setting time is not less than 30 minutes

D. Compressive stress after 7 days, is not less than 175 kg/cm2

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4

Addition of pozzolana to ordinary port land cement, causes

A. Decrease in early strength

B. Reduction in chemical action with sulphates

C. Increase in shrinkage

D. All the above

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4

The void ratio of

A. Single size coarse aggregate is roughly 0.45

B. Graded coarse aggregate is roughly 0.040

C. Fine aggregate is roughly 0.45

D. All the above

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4

Shrinkage in concrete can be reduced by using

A. Low water cement ratio

B. Less cement in the concrete

C. Proper concrete mix

D. All the above

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4

Grading of sand causes great variation in

A. Workability of concrete

B. Strength of concrete

C. Durability of concrete

D. All the above

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4

Separation of coarse aggregates from mortar during transportation, is known

A. Bleeding

B. Creeping

C. Segregation

D. Shrinkage

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4

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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4

Pick up the correct statement from the following:

A. Higher workability indicates unexpected increase in the moisture content

B. Higher workability indicates deficiency of sand

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

D. All the above

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4

Diagonal tension in a beam

A. Is maximum at neutral axis

B. Decreases below the neutral axis and increases above the neutral axis

C. Increases below the neutral axis and decreases above the neutral axis

D. Remains same

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4

Pre-stress loss due to friction occurs

A. Only in post-tensioned beams

B. Only in pre-tensioned beams

C. In both post-tensioned and pre-tensioned beams

D. None of the above

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4

Proper batching ensures

A. Economy

B. Durability

C. Workability

D. All the above

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4

The operation of removing humps and hollows of uniform concrete surface, is known as

A. Floating

B. Screeding

C. Trowelling

D. Finishing

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4

Assertion A : The load factor for live load is greater than that for dead load. Reason R : The live loads are more uncertain than dead loads. Select your answer based on the coding system given below:

A. Both A and R is true and R is the correct explanation of A

B. Both A and R is true but R is not the correct explanation of A

C. A is true but R is false

D. A is false but R is true

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4

The minimum percentage of chemical ingredient of cement is that of

A. Magnesium oxide

B. Iron oxide

C. Alumina

D. Lime

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4

Strength of concrete with passage of time

A. Increases

B. Decreases

C. Fluctuates

D. Remains constant

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4

The increased cohesiveness of concrete, makes it

A. Less liable to segregation

B. More liable to segregation

C. More liable to bleeding

D. More liable for surface scaling in frosty weather

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4

Maximum percentage reinforcement in case of slabs is limited to

A. 2

B. 4

C. 6

D. 8

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4

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

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

An aggregate is said to be flaky if its least dimension is less than

A. 1/5th of mean dimension

B. 2/5th of mean dimension

C. 3/5th of mean dimension

D. 4/5th of mean dimension

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4

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

If the effective plan area of a warehouse is 54 sq. m, and maximum height of piles permitted is 270 cm, the number of cement bags to be stored, is

A. 2000 bags

B. 2200 bags

C. 2400 bags

D. 2700 bags