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4

Inert material of a cement concrete mix, is

A. Water

B. Cement

C. Aggregate

D. None of these

Correct Answer :

C. Aggregate


Related Questions

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4

Workability improved by adding

A. Air-entraining agent

B. Foaming agent

C. Oily-agent

D. All the above

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4

Too wet concrete may cause

A. Weakness of concrete

B. Excessive laitance

C. Segregation

D. All the above

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4

Curing a concrete for long period ensures better

A. Volume stability

B. Strength

C. Water resistance

D. All the above

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4

The risk of segregation is more for

A. Wetter mix

B. Larger proportion of maximum size aggregate

C. Coarser grading

D. All the above

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4

Pick up the correct statement from the following:

A. Water enables chemical reaction to take place with cement

B. Water lubricates the mixture of gravel, sand and cement

C. Strength of concrete structure largely depends upon its workability

D. All 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

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

For the design of retaining walls, the minimum factor of safety against overturning is taken as

A. 1.5

B. 2.0

C. 2.5

D. 3.0

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4

For a reinforced concrete section, the shape of shear stress diagram is

A. Wholly parabolic

B. Wholly rectangular

C. Parabolic above neutral axis and rectangular below neutral axis

D. Rectangular above neutral axis and parabolic below neutral axis

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4

The slab is designed as one way if the ratio of long span to short span is

A. Less than 1

B. Between 1 and 1.5

C. Between 1.5 and 2

D. Greater than 2

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4

Pick up the incorrect statement from the following:

A. The degree of grinding of cement, is called fineness

B. The process of changing cement paste into hard mass, is known as setting of cement

C. The phenomenon by virtue of which cement does not allow transmission of sound, is known as soundness of cement

D. The heat generated during chemical reaction of cement with water, is known as heat of hydration

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4

The most useless aggregate is one whose surface texture is

A. Smooth

B. Granular

C. Glassy

D. Honey combed and porous

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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. 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

The temperature reinforcement in the vertical slab of a T-shaped R.C. retaining wall is

A. Not needed

B. Provided equally on inner and front faces

C. Provided more on inner face than on front face

D. Provided more on front face than on inner face

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4

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

A concrete using an air entrained cement

A. Has strength less than 10% to 15%

B. Has more resistance to weathering

C. Is more plastic and workable

D. Is free from segregation and bleeding

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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

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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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4

Pick up the correct statement from the following:

A. A highly absorptive aggregate reduces the workability of concrete considerably

B. The specific gravity of aggregate is important for the determination of the moisture content

C. The absorption and porosity of an aggregate influence the property of the concrete

D. All the above

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4

The approximate value of the ratio between direct tensile strength and flexural strength is

A. 0.33

B. 0.5

C. 0.75

D. 1.0

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4

Which of the following has high tensile strength?

A. Plain hot rolled wires

B. Cold drawn wires

C. Heat treated rolled wires

D. All have same tensile strength

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4

1% of voids in a concrete mix would reduce its strength by about

A. 5 %

B. 10 %

C. 15 %

D. 20 %

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4

Curing of pavements, floors, roofs and slabs, is done by

A. Membrane method

B. Ponding method

C. Covering surface with bags

D. Sprinkling water method

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4

Stress strain curve of high tensile steel

A. Has a definite yield point

B. Does not show definite yield point but yield point is defined by 0.1% proof stress

C. Does not show definite yield point but yield point is defined by 0.2% proof stress

D. Does not show definite yield point but yield point is defined by 2% proof stress,

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4

For construction of structures in sea water, the cement generally preferred to, is

A. Portland-pozzolana cement

B. Quick setting cement

C. Low heat Portland cement

D. Rapid hardening cement

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4

Pozzolanic properties exist in

A. Shales

B. Fly ash

C. Pumicite

D. All the above

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4

The compaction of concrete, improves

A. Density

B. Strength

C. Durability

D. All the above

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4

Pick up the incorrect statement from the following:

A. In properly graded aggregates, bulk density is more

B. In single size aggregates, bulk density is least

C. In single size aggregates, bulk density is maximum

D. None of these

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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