Non-uniform compaction may cause the concrete (A) Porous (B) Non-homogeneous (C) Reduced strength (D) All the above

Non-uniform compaction may cause the concrete
(A) Porous
(B) Non-homogeneous
(C) Reduced strength
(D) All the above
by

1 Answer

Answer :

Answer: Option D
by

Related questions

Pick up the correct statement from the following: (A) Sand obtained from pits, is washed to remove clay and silt (B) Sand obtained from flooded pits, need not be washed before use (C) The chloride in sea shore sand and shingle may cause corrosion of reinforcement if the concrete is porous (D) All the above

Description : Pick up the correct statement from the following: (A) Sand obtained from pits, is washed to remove clay and silt (B) Sand obtained from flooded pits, need not be washed before use (C) The ... shore sand and shingle may cause corrosion of reinforcement if the concrete is porous (D) All the above

Last Answer : Answer: Option D

The compaction of concrete, improves (A) Density (B) Strength (C) Durability (D) All the abov

Description : The compaction of concrete, improves (A) Density (B) Strength (C) Durability (D) All the abov

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Workability of concrete mix with low water cement ratio is determined by (A) Tensile strength test (B) Slump test (C) Compaction factor test (D) Flexural strength test

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Pick up the correct statement from the following: (A) Plain cement concrete is equally strong in compression as well as in tension (B) Slump test is performed to check concrete strength (C) Curing of concrete is done for proper compaction of cement (D) Fineness modulus is the index number expressing the relative sizes of both coarse and fine aggregates

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Workability of concrete mix with low water cement ratio is determined by [ A ] Tensile strength test [ B ] Slump cone test [ C ] Compaction factor test [ D ] Flexural strength test

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Thickness of a pavement may be reduced considerably by (A) Compaction of soil (B) Stabilisation of soil (C) Drainage of soil (D) Combination of all the above

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The Euler's equation for the motion of liquids is based upon the assumption that (A) The fluid is non - viscous, homogeneous and incompressible (B) The velocity of flow is uniform over the section (C) The flow is continuous, steady and along the stream line (D) All of the above

Description : The Euler's equation for the motion of liquids is based upon the assumption that (A) The fluid is non - viscous, homogeneous and incompressible (B) The velocity of flow is uniform over the section (C) The flow is continuous, steady and along the stream line (D) All of the above

Last Answer : Answer: Option D

The infiltration capacity during rain storm, is considerably reduced due to (A) Surface detention (B) Soil moisture (C) Compaction due to rain (D) All the above

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In capacitance grading of cables we use a ______ dielectric. (a) composite (b) porous (c) homogeneous (d) hygroscopic

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Segregation is responsible for (A) Honey-combed concrete (B) Porous layers in concrete (C) Surface scaling in concrete (D) All the above

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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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Segregation in concrete results in (a) Honey combing (b) Porous Layers (c) Surface scaling (d) All the above

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Concrete is unsuitable for compaction by a vibrator if it is (A) Dry (B) Earth moist (C) Semi-plastic (D) Plastic

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Last Answer : Answer: Option D

The produce impermeable concrete (A) Thorough mixing of concrete is required (B) Proper compaction of concrete is required (C) Proper curing of concrete is required (D) All the above

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The property of the ingredients to separate from each other while placing the concrete is called (A) Segregation (B) Compaction (C) Shrinkage (D) Bulking

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The compaction of concrete in the drilled pile hole is done by compressed air in the case of (A) Simplex pile (B) Franki pile (C) Pressure pile (D) Vibro pile

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The process of keeping concrete moist for a certain period after its finishing, is known as (A) Finishing of concrete (B) Curing of concrete (C) Placing of concrete (D) Compaction of concrete

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The purpose of lateral ties in short R.C. columns is to (a) Increase the load carrying capacity of column (b) Facilitate compaction of concrete (c) Facilitate construction (d) Avoid buckling of longitudinal bars

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The process of consolidating concrete mix after placing it in position is termed as. (a) Curing (b) Wetting (c) Compaction (d) All of these

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The workability of concrete is expressed by (a) Water-cement ratio (b) Slump value (c) Compaction factor (d) Both (a) and (b)

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The purpose of lateral ties in short reinforced concrete columns is to [ A ] Facilitate construction [ B ] Facilitate compaction of concrete [ C ] Increase the load carrying capacity of the columns [ D ] Avoid buckling of longitudinal bars

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Workability of a concrete – mix is determined by (i)Slump cone test (ii)Compaction factor test (iii)Vee bee test [ A ] i [ B ] ii [ C ] i and ii [ D ] i, ii and iii

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While determining the workability of concrete mix, the compaction factor test is ------than the slump cone test [ A ] Less accurate [ B ] More accurate [ C ] Approximate method [ D ] None of the above

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Concrete is unsuitable for compaction by vibration if it is [ A ] Semi – plastic [ B ] Plastic [ C ] Earth moist [ D ] Dry

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If 30% excess water is added, the strength of concrete is reduced by (a) 30% (b) 40% (c) 50% (d) 60%

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The strength of concrete using air entraining cement gets reduced by (a) 5 to 10% (b) 10 to 15% (c) 15 to 20% (d) 20 to 25%

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The change of moisture content of soils, changes the (A) Value of the angle of repose (B) Amount of compaction required (C) Cohesive strength of soil (D) All the above

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For the determination of shear strength parameters, c and , of soil in the laboratory, the test to be conducted will be (a) Triaxial compression test (b) Sieve analysis (c) Compaction test (d) Relative density test

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For a first order isothermal chemical reaction in a porous catalyst, the effectiveness factor is 0.3. The effectiveness factor will increase if the (A) Catalyst size is reduced or the catalyst diffusivity is reduced (B) Catalyst size is reduced or the catalyst diffusivity is increased (C) Catalyst size is increased or the catalyst diffusivity is reduced(D) Catalyst size is increased or the catalyst diffusivity is increased

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A reinforced concrete beam is assumed to be made of (A) Homogeneous material (B) Heterogeneous material (C) Isotropic material (D) None of these

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The workability of concrete is defined as the (a) Ease with which it can be mixed, transported and placed in position in a homogeneous state. (b) Bearing up of cohesion in a mass concrete. (c) Separation of water from the freshly mixed concrete. (d) None of these.

Description : The workability of concrete is defined as the (a) Ease with which it can be mixed, transported and placed in position in a homogeneous state. (b) Bearing up of cohesion in a mass concrete. (c) Separation of water from the freshly mixed concrete. (d) None of these.

Last Answer : (a) Ease with which it can be mixed, transported and placed in position in a homogeneous state.

The deleterious materials present in the aggregate (a) Prevent normal hydration of cement (b) Reduce the strength and durability of concrete. (c) Modify the setting action and cause efloresecence. (d) All of the above

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The bearing capacity of a water logged soil, may be improved by (A) Grouting (B) Chemical action (C) Drainage (D) Compaction

Description : The bearing capacity of a water logged soil, may be improved by (A) Grouting (B) Chemical action (C) Drainage (D) Compaction

Last Answer : Answer: Option C

Explain the significance of batching, compaction and curing of concrete.

Description : Explain the significance of batching, compaction and curing of concrete. 

Last Answer : Significance of Batching: 1. If the batching of materials required for concrete is not done appropriately, then random quantity of materials produce non-homogeneous concrete, which further leads to various ... . 3. Curing is necessary to make the concrete impermeable in nature its hardened state.

Pick up the correct statement from the following: (A) The permeability of the coarse-grained soils may be reduced by grouting (B) The process of injecting fluids (i.e. grouts) into the pores space of the soil is called grouting (C) The grouting increases the soil strength (D) All the above

Description : Pick up the correct statement from the following: (A) The permeability of the coarse-grained soils may be reduced by grouting (B) The process of injecting fluids (i.e. grouts) into the pores space of the soil is called grouting (C) The grouting increases the soil strength (D) All the above

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The condition not applicable to water cement ratio law, is (A) Internal moisture conditions on hydration continue till complete strength is gained (B) Concrete specimens may be tested at any temperature (C) Concrete specimens need be of same age (D) Concrete specimens need be of same size

Description : The condition not applicable to water cement ratio law, is (A) Internal moisture conditions on hydration continue till complete strength is gained (B) Concrete specimens may be tested at any temperature (C) Concrete specimens need be of same age (D) Concrete specimens need be of same size

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The reduced levels of points, 30 metres apart along the longitudinal section of a road portion between chainages 5 and 9 are shown in the given figure. If there is a uniform up-gradient of the road 120 in 1, the chainage of the point with no filling or cutting is (A) (6 + 15) chains (B) (6 + 12) chains (C) (6 + 18) chains (D) None of these

Description : The reduced levels of points, 30 metres apart along the longitudinal section of a road portion between chainages 5 and 9 are shown in the given figure. If there is a uniform up-gradient of the road 120 in 1, the chainage ... 15) chains (B) (6 + 12) chains (C) (6 + 18) chains (D) None of these

Last Answer : (B) (6 + 12) chains

In resources levelling (A) Total duration of project is reduced (B) Total duration of project is increased (C) Uniform demand of resources is achieved (D) Cost of project is controlled

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The operation of removing humps and hollows of uniform concrete surface, is known as (A) Floating (B) Screeding (C) Trowelling (D) Finishing

Description : The operation of removing humps and hollows of uniform concrete surface, is known as (A) Floating (B) Screeding (C) Trowelling (D) Finishing

Last Answer : (B) Screeding

The base of a column is subjected to moment. If the intensity of bearing pressure due to axial load is equal to stress due to moment, then the bearing pressure between the base and the concrete is (a) Uniform compression throughout (b) Zero at one end and compression at the other end (c) Tension at one end and compression at the other end (d) Compression, verying as a parabolic profile

Description : The base of a column is subjected to moment. If the intensity of bearing pressure due to axial load is equal to stress due to moment, then the bearing pressure between the base and the concrete ... Tension at one end and compression at the other end (d) Compression, verying as a parabolic profile

Last Answer : (b) Zero at one end and compression at the other end

While designing an air entrained concrete (A) Water cement ratio is reduced (B) Proportion of aggregates is reduced (C) An allowance for the entrained air is made (D) All the above

Description : While designing an air entrained concrete (A) Water cement ratio is reduced (B) Proportion of aggregates is reduced (C) An allowance for the entrained air is made (D) All the above

Last Answer : (D) All the above

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

Description : 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

Last Answer : Answer: Option D

The theoretical stress-strain curve of the concrete in the Limit State design of structures is correspondingly reduced by the factor [ A ] 0.35 [ B ] 0.5 [ C ] 0.67 [ D ] 0.75

Description : The theoretical stress-strain curve of the concrete in the Limit State design of structures is correspondingly reduced by the factor [ A ] 0.35 [ B ] 0.5 [ C ] 0.67 [ D ] 0.75

Last Answer : [ C ] 0.67

The theoretical stress-strain curve of the concrete in the Limit State design of structures is correspondingly reduced by the factor [ A ] 0.35 [ B ] 0.5 [ C ] 0.67 [ D ] 0.75

Description : The theoretical stress-strain curve of the concrete in the Limit State design of structures is correspondingly reduced by the factor [ A ] 0.35 [ B ] 0.5 [ C ] 0.67 [ D ] 0.75

Last Answer : [ C ] 0.67

Shrinkage in concrete can be reduced by using (i) Low water cement ratio (ii) More amount of cement in the concrete (iii) Presaturated aggregates [ A ] i [ B ] i and ii [ C ] i and iii [ D ] i, ii and iii

Description : Shrinkage in concrete can be reduced by using (i) Low water cement ratio (ii) More amount of cement in the concrete (iii) Presaturated aggregates [ A ] i [ B ] i and ii [ C ] i and iii [ D ] i, ii and iii

Last Answer : [ C ] i and iii

Weld decay will cause which of the following problems? a) A reduced resistance to corrosion b) a lower tensile strength c) The toughness is reduced d) The hardness will increase

Description : Weld decay will cause which of the following problems? a) A reduced resistance to corrosion b) a lower tensile strength c) The toughness is reduced d) The hardness will increase

Last Answer : a) A reduced resistance to corrosion

Too wet concrete may cause (A) Weakness of concrete (B) Excessive laitance (C) Segregation (D) All the above

Description : Too wet concrete may cause (A) Weakness of concrete (B) Excessive laitance (C) Segregation (D) All the above

Last Answer : (D) All the above

For beams of uniform strength, if depth is constant, (A) Width b M (B) Width b M (C) Width b 3 M (D) Width b 1/M

Description : For beams of uniform strength, if depth is constant,  (A) Width b M (B) Width b M (C) Width b 3 M (D) Width b 1/M

Last Answer : (A) Width b M

The width of a beam of uniform strength having a constant depth d length L, simply supported at the ends with a central load W is (A) 2WL/3fd² (B) 3WL/2fd² (C) 2fL/3Wd 4 (D) 3fL²/2Wd

Description : The width of a beam of uniform strength having a constant depth d length L, simply supported at the ends with a central load W is (A) 2WL/3fd² (B) 3WL/2fd² (C) 2fL/3Wd 4 (D) 3fL²/2Wd

Last Answer : (B) 3WL/2fd²