To obtain a very high strength concrete, use very fine grained

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To obtain a very high strength concrete, use very fine grained

A. Granite

B. Magnetite

C. Barite

D. Volcanic scoria

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Non-uniform compaction may cause the concrete

A. Porous

B. Non-homogeneous

C. Reduced strength

D. All the above

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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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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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Workability of concrete is measured by

A. Vicat apparatus test

B. Slump test

C. Minimum void method

D. Talbot Richard test

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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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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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Pick up the correct statement from the following:

A. Sand stones may be divided into calcareous, siliceous and ferruginous sand stones

B. Concrete using sand stones, cracks due to excessive shrinkage

C. Broken bricks produce a concrete having good fire resisting qualities

D. All the above

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In a pile of length l, the points of suspension from ends for lifting it are located at

A. 0.207 l

B. 0.25 l

C. 0.293 l

D. 0.333 l

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The purpose of reinforcement in pre-stressed concrete is

A. To provide adequate bond stress

B. To resist tensile stresses

C. To impart initial compressive stress in concrete

D. All of the above

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While designing the pile as a column, the end conditions are nearly

A. Both ends hinged

B. Both ends fixed

C. One end fixed and other end hinged

D. One end fixed and other end free

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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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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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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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The impurity of mixing water which affects the setting time and strength of concrete, is

A. Sodium sulphates

B. Sodium chlorides

C. Sodium carbonates and bicarbonates

D. Calcium bicarbonates

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For a concrete mix 1:3:6 and water cement ratio 0.6 both by weight, the quantity of water required per bag, is

A. 10 kg

B. 12 kg

C. 14 kg

D. 16 kg

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Le-Chatelier's apparatus is used for testing

A. Soundness of cement

B. Hardness of cement

C. Strength of cement

D. Durability of cement

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If 1500 g of water is required to have a cement paste 1875 g of normal consistency, the percentage of water is,

A. 20 %

B. 25 %

C. 30 %

D. 35 %

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Pick up the incorrect statement from the following:

A. Space between the exterior walls of a warehouse and bag piles should be 30 cm

B. Cement bags should preferably be piled on wooden planks

C. Width and height of the pile should not exceed 3 m and 2.70 m respectively

D. None of these

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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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According to IS : 382-1963, a good aggregate should be

A. Chemically inert

B. Sufficiently strong

C. Hard and durable

D. All the above

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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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If the depth of actual neutral axis in a beam is more than the depth of critical neutral axis, then the beam is called

A. Balanced beam

B. Under-reinforced beam

C. Over-reinforced beam

D. None of the above

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The relation between modulus of rupture f_cr, splitting strength f_cs and direct tensile strength f_cl is given by

A. f_cr - f_cs = f_cl

B. f_cr > f_cs > f_cl

C. f_cr < f_cs < f_cl

D. f_cs > f_cr > f_cl

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The most commonly used admixture which prolongs the setting and hardening time is

A. Gypsum

B. Calcium chloride

C. Sodium silicate

D. All of the above

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The minimum cover to the ties or spirals should not be less than

A. 15 mm

B. 20 mm

C. 25 mm

D. 50 mm

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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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Pick up the correct statement from the following:

A. High percentage of C₃S and low percentage of C₂S cause rapid hardening

B. High percentage of C₃S and low percentage of C₂S make the cement less resistive to chemical attack

C. Low percentage of C₃S and high percentage of C₂S contribute to slow hardening

D. All the above

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For a simply supported beam of span 15 m, the minimum effective depth to satisfy the vertical deflection limits should be

A. 600 mm

B. 750 mm

C. 900 mm

D. More than 1 m

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The ratio of the length to breadth of a wooden float, is

A. 4.5

B. 5.5

C. 6.5

D. 7.5

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According to Whitney's theory, depth of stress block for a balanced section of a concrete beam is limited to

A. 0.43 d

B. 0.537 d

C. 0.68 d

D. 0.85 d Where d is effective depth of beam

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Accepted Answer

A. Granite

To obtain a very high strength concrete, use very fine grained

Correct Answer :

Show all Concrete Technology and Design MCQ

Related Questions

Non-uniform compaction may cause the concrete

Water cement ratio is

The factor of safety for

Workability of concrete is measured by

Workability of concrete mix with low water cement ratio is determined by

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

Pick up the correct statement from the following:

In a pile of length l, the points of suspension from ends for lifting it are located at

The purpose of reinforcement in pre-stressed concrete is

While designing the pile as a column, the end conditions are nearly

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

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

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

The impurity of mixing water which affects the setting time and strength of concrete, is

For a concrete mix 1:3:6 and water cement ratio 0.6 both by weight, the quantity of water required per bag, is

Le-Chatelier's apparatus is used for testing

If 1500 g of water is required to have a cement paste 1875 g of normal consistency, the percentage of water is,

Pick up the incorrect statement from the following:

Pick up the correct statement from the following:

According to IS : 382-1963, a good aggregate should be

Pick up the correct statement from the following:

If the depth of actual neutral axis in a beam is more than the depth of critical neutral axis, then the beam is called

The relation between modulus of rupture f_cr, splitting strength f_cs and direct tensile strength f_cl is given by

The most commonly used admixture which prolongs the setting and hardening time is

The minimum cover to the ties or spirals should not be less than

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

Pick up the correct statement from the following:

For a simply supported beam of span 15 m, the minimum effective depth to satisfy the vertical deflection limits should be

The ratio of the length to breadth of a wooden float, is

According to Whitney's theory, depth of stress block for a balanced section of a concrete beam is limited to

Also checkout

To obtain a very high strength concrete, use very fine grained

Correct Answer :

Show all Concrete Technology and Design MCQ

Related Questions

Non-uniform compaction may cause the concrete

Water cement ratio is

The factor of safety for

Workability of concrete is measured by

Workability of concrete mix with low water cement ratio is determined by

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

Pick up the correct statement from the following:

In a pile of length l, the points of suspension from ends for lifting it are located at

The purpose of reinforcement in pre-stressed concrete is

While designing the pile as a column, the end conditions are nearly

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

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

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

The impurity of mixing water which affects the setting time and strength of concrete, is

For a concrete mix 1:3:6 and water cement ratio 0.6 both by weight, the quantity of water required per bag, is

Le-Chatelier's apparatus is used for testing

If 1500 g of water is required to have a cement paste 1875 g of normal consistency, the percentage of water is,

Pick up the incorrect statement from the following:

Pick up the correct statement from the following:

According to IS : 382-1963, a good aggregate should be

Pick up the correct statement from the following:

If the depth of actual neutral axis in a beam is more than the depth of critical neutral axis, then the beam is called

The relation between modulus of rupture fcr, splitting strength fcs and direct tensile strength fcl is given by

The most commonly used admixture which prolongs the setting and hardening time is

The minimum cover to the ties or spirals should not be less than

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

Pick up the correct statement from the following:

For a simply supported beam of span 15 m, the minimum effective depth to satisfy the vertical deflection limits should be

The ratio of the length to breadth of a wooden float, is

According to Whitney's theory, depth of stress block for a balanced section of a concrete beam is limited to

Also checkout

The relation between modulus of rupture f_cr, splitting strength f_cs and direct tensile strength f_cl is given by