To ensure constant moisture content in aggregates

Question

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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In case of hand mixing of concrete, the extra cement to be added is

A. 5 %

B. 10 %

C. 15 %

D. 20 %

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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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Modulus of rupture of concrete is a measure of

A. Flexural tensile strength

B. Direct tensile strength

C. Compressive strength

D. Split tensile strength

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Efflorescence in cement is caused due to an excess of

A. Alumina

B. Iron oxide

C. Silica

D. Alkalis

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If the engineer-in-charge approves, the 10 cm cubes may be used for the work test of concrete provided maximum nominal size of aggregate, does not exceed

A. 10 cm

B. 15 cm

C. 20 cm

D. 25 cm

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You are asked to construct a massive dam, the type of cement you will use, is

A. Ordinary Portland cement

B. Rapid hardening cement

C. Low heat cement

D. Blast furnace slag cement

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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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If the slump of a concrete mix is 60 mm, its workability is

A. Very low

B. Low

C. Medium

D. High

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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

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

A. Extremely low

B. Very low

C. Low

D. High

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Cube strength of controlled concrete to be used for pre-tensioned and post-tensioned work respectively should not be less than

A. 35 MPa and 42 MPa

B. 42 MPa and 35 MPa

C. 42 MPa and 53 MPa

D. 53 MPa and 42 MPa

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The entrained air in concrete

A. Increases workability

B. Decreases workability

C. Decreases resistance to weathering

D. Increases strength

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The factor of safety for

A. Steel and concrete are same

B. Steel is lower than that for concrete

C. Steel is higher than that for concrete

D. None of the above

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High temperature

A. Increases the strength of concrete

B. Decreases the strength of concrete

C. Has no effect on the strength of concrete

D. None of these

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The design yield stress of steel according to IS: 4561978 is: (Where f_y is the characteristic yield strength of steel)

A. 0.37 f_y

B. 0.57 f_y

C. 0.67 f_y

D. 0.87 f_y

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Maximum percentage reinforcement in case of slabs is limited to

A. 2

B. 4

C. 6

D. 8

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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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To prevent segregation, the maximum height for placing concrete, is

A. 100 cm

B. 125 cm

C. 150 cm

D. 200 cm

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The surface where two successive placements of concrete meet, is known as

A. Contraction joint

B. Expansion joint

C. Construction joint

D. Both (a) and (b)

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Concrete containing

A. Siliceous aggregates, has higher co-efficient of expansion

B. Igneous aggregates, has intermediate coefficient of expansion

C. Lime stones, has lowest co-efficient of expansion

D. All the above

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Saw dust can be rendered chemically inert by boiling it in water containing

A. Ferrous sulphate

B. Potassium chloride

C. Ammonia

D. Nitric acid

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If the foundations of all the columns of a structure are designed on the total live and dead load basis, then

A. There will be no settlement of columns

B. There will be no differential settlement

C. The settlement of exterior columns will be more than interior columns

D. The settlement of interior columns will be more than exterior columns

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Workability of concrete is directly proportional to

A. Aggregate cement ratio

B. Time of transit

C. Grading of the aggregate

D. All of above

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Slump test of concrete is a measure of its

A. Consistency

B. Compressive strength

C. Tensile strength

D. Impact value

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Tricalcium aluminate (C₃A)

A. Reacts fast with water

B. Generates less heat of hydration

C. Causes initial setting and early strength of cement

D. Does not contribute to develop ultimate strength

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For a continuous slab of 3 m × 3.5 m size, the minimum overall depth of slab to satisfy vertical deflection limits is

A. 50 mm

B. 75 mm

C. 100 mm

D. 120 mm

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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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In slump test, each layer of concrete is compacted by a steel rod 60 cm long and of 16 mm diameter for

A. 20 times

B. 25 times

C. 30 times

D. 50 times

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Pick up the correct statement from the following:

A. The weight of ingredients of concrete mix, is taken in kilograms

B. Water and aggregates are measured in litres

C. 20 bags of cement make one tonne

D. All the above

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To minimise the effect of differential settlement, the area of a footing should be designed for

A. Dead load only

B. Dead load + live load

C. Dead load + fraction of live load

D. Live load + fraction of dead load

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Accepted Answer

D. All the above

To ensure constant moisture content in aggregates

Correct Answer :

Show all Concrete Technology and Design MCQ

Related Questions

In case of hand mixing of concrete, the extra cement to be added is

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

Modulus of rupture of concrete is a measure of

Efflorescence in cement is caused due to an excess of

If the engineer-in-charge approves, the 10 cm cubes may be used for the work test of concrete provided maximum nominal size of aggregate, does not exceed

You are asked to construct a massive dam, the type of cement you will use, is

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

If the slump of a concrete mix is 60 mm, its workability is

Construction joints are provided

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

Cube strength of controlled concrete to be used for pre-tensioned and post-tensioned work respectively should not be less than

The entrained air in concrete

The factor of safety for

High temperature

The design yield stress of steel according to IS: 4561978 is: (Where f_y is the characteristic yield strength of steel)

Maximum percentage reinforcement in case of slabs is limited to

Permissible compressive strength of M 150 concrete grade is

To prevent segregation, the maximum height for placing concrete, is

The surface where two successive placements of concrete meet, is known as

Concrete containing

Saw dust can be rendered chemically inert by boiling it in water containing

If the foundations of all the columns of a structure are designed on the total live and dead load basis, then

Workability of concrete is directly proportional to

Slump test of concrete is a measure of its

Tricalcium aluminate (C₃A)

For a continuous slab of 3 m × 3.5 m size, the minimum overall depth of slab to satisfy vertical deflection limits is

Pick up the correct statement from the following:

In slump test, each layer of concrete is compacted by a steel rod 60 cm long and of 16 mm diameter for

Pick up the correct statement from the following:

To minimise the effect of differential settlement, the area of a footing should be designed for

Also checkout

To ensure constant moisture content in aggregates

Correct Answer :

Show all Concrete Technology and Design MCQ

Related Questions

In case of hand mixing of concrete, the extra cement to be added is

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

Modulus of rupture of concrete is a measure of

Efflorescence in cement is caused due to an excess of

If the engineer-in-charge approves, the 10 cm cubes may be used for the work test of concrete provided maximum nominal size of aggregate, does not exceed

You are asked to construct a massive dam, the type of cement you will use, is

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

If the slump of a concrete mix is 60 mm, its workability is

Construction joints are provided

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

Cube strength of controlled concrete to be used for pre-tensioned and post-tensioned work respectively should not be less than

The entrained air in concrete

The factor of safety for

High temperature

The design yield stress of steel according to IS: 4561978 is: (Where fy is the characteristic yield strength of steel)

Maximum percentage reinforcement in case of slabs is limited to

Permissible compressive strength of M 150 concrete grade is

To prevent segregation, the maximum height for placing concrete, is

The surface where two successive placements of concrete meet, is known as

Concrete containing

Saw dust can be rendered chemically inert by boiling it in water containing

If the foundations of all the columns of a structure are designed on the total live and dead load basis, then

Workability of concrete is directly proportional to

Slump test of concrete is a measure of its

Tricalcium aluminate (C3A)

For a continuous slab of 3 m × 3.5 m size, the minimum overall depth of slab to satisfy vertical deflection limits is

Pick up the correct statement from the following:

In slump test, each layer of concrete is compacted by a steel rod 60 cm long and of 16 mm diameter for

Pick up the correct statement from the following:

To minimise the effect of differential settlement, the area of a footing should be designed for

Also checkout

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

The design yield stress of steel according to IS: 4561978 is: (Where f_y is the characteristic yield strength of steel)

Tricalcium aluminate (C₃A)