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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

Correct Answer :

D. All the above


Related Questions

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4

The aggregate impact value of the aggregate used in

A. Building concrete is less than 45

B. Road pavement concrete is less than 30

C. Runway concrete is less than 30

D. All the above

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4

Pick up the correct statement from the following:

A. Construction joints in columns are provided a few cm below the junction of beam

B. Construction joints in columns are provided at the bottom hunching

C. Construction joints in beams and slabs are provided within middle third

D. All the above

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4

Specified compressive strength of concrete is obtained from cube tests at the end of

A. 3 days

B. 7 days

C. 21 days

D. 28 days

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4

According to IS: 4561978, minimum slenderness ratio for a short column is

A. Less than 12

B. Less than 18

C. Between 18 and 24

D. More than 24

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4

The shrinkage of concrete

A. Is proportional to water content is the mix

B. Is proportional to cement concrete

C. Increases with age of concrete

D. All the above

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4

In counterfort type retaining walls (i) The vertical slab is designed as a continuous slab (ii) The heel slab is designed as a continuous slab (iii) The vertical slab is designed as a cantilever (iv) The heel slab is designed as a cantilever The correct answer is

A. (i) and (ii)

B. (i)and(iv)

C. (ii) and (iii)

D. (iii) and (iv)

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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

Pick up the incorrect statement from the following:

A. Concrete for which preliminary tests are conducted, is called controlled concrete

B. Bulking of sand depends upon the fineness of grains

C. Concrete mix 1 : 6 : 12, is used for mass concrete in piers

D. All 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 factor which affects workability, is

A. Water content and its temperature

B. Shape and size of the aggregates

C. Air entraining agents

D. All the above

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4

Increase in the moisture content in concrete

A. Reduces the strength

B. Increases the strength

C. Does not change the strength

D. All of the above

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4

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

Pick up the correct statement from the following:

A. The concrete gains strength due to hydration of cement

B. The concrete does not set at freezing point

C. The strength of concrete increases with its age

D. All the above

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4

A continuous beam is deemed to be a deep beam when the ratio of effective span to overall depth (1/D) is less than

A. 1.5

B. 2.0

C. 2.5

D. 3.0

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4

Permissible compressive strength of M 150 concrete grade is

A. 100 kg/cm2

B. 150 kg/cm2

C. 200 kg/cm2

D. 250 kg/cm2

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4

For walls, columns and vertical faces of all structural members, the form work is generally removed after

A. 24 to 48 hours

B. 3 days

C. 7 days

D. 14 days

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4

Pick up the correct statement from the following:

A. Continuous grading is not necessary for obtaining a minimum of air voids

B. The omission of a certain size of aggregate is shown by a straight horizontal line on the grading curve

C. The omission of a certain size of aggregate in concrete increases the workability but also increases the liability to segregation

D. All the above

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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

The diameter of the Vicat plunger is 10 mm and its length varies from

A. 20 mm to 30 mm

B. 30 mm to 40 mm

C. 40 mm to 50 mm

D. 50 mm to 60 mm

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4

The load factors for live load and dead load are taken respectively as

A. 1.5 and 2.2

B. 2.2 and 1.5

C. 1.5 and 1.5

D. 2.2 and 2.2

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4

Percentage of pozzolanic material containing clay upto 80% used for the manufacture of pozzolana cement, is

A. 30 %

B. 40 %

C. 50 %

D. 60 %

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4

A T-shaped retaining wall mainly consists of

A. One cantilever

B. Two cantilevers

C. Three cantilevers

D. Four cantilevers

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4

Due to shrinkage stresses, a simply supported beam having reinforcement only at bottom tends to

A. Deflect downward

B. Deflect upward

C. Deflect downward or upward

D. None of the above

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4

The concrete mix which causes difficulty in obtaining a smooth finish, possess

A. Segregation

B. Internal friction

C. Hardness

D. Bleeding

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4

Pick up the correct proportions of chemical ingredients of cement

A. Lime : Silica : Alumina : Iron oxide : 63 : 22 : 6 : 3

B. Silica : Lime : Alumina : Iron oxide : 63 : 22 : 6 : 3

C. Alumina : Silica : Lime : Iron oxide : 63 : 22 : 6 : 3

D. Iron oxide : Alumina : Silica : Lime : 63 : 22 : 6 : 3

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4

Pick up the correct statement from the following:

A. Cement should be mixed for at least one minute

B. 10% of water is placed in the rotating drum before adding dry material

C. 10% of water is added after placing the other ingredients in the drum

D. All the above

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4

Hardening of cement occurs at

A. Rapid rate during the first few days and afterwards it continues to increase at a decreased rate

B. Slow rate during the first few days and afterwards it continues to increase at a rapid rate

C. Uniform rate throughout its age

D. None of these

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4

Select the incorrect statement

A. Lean mixes bleed more as compared to rich ones.

B. Bleeding can be minimized by adding pozzolana finer aggregate

C. Bleeding can be increased by addition 'of calcium chloride

D. None of the above

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4

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

A. 2/3 mean dimension

B. 3/4 mean dimension

C. 3/5 mean dimension

D. 5/8 mean dimension

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4

For given workability the grading requiring the least amount of water is one that gives

A. Greatest surface area for the given cement and aggregates

B. Least surface area for the given cement and aggregates

C. Least weight for the given cement and aggregates

D. Greatest weight for the given cement and aggregates