Normally pre-stressing wires are arranged in the

Question

Normally pre-stressing wires are arranged in the

A. Upper part of the beam

B. Lower part of the beam

C. Center

D. Anywhere

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For ensuring quality of concrete, use

A. Single sized aggregates

B. Two sized aggregate

C. Graded aggregates

D. Coarse aggregates

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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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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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Pick up the correct statement from the following:

A. The free water is the amount of water added while mixing and the amount of water held on the surface of the aggregates prior to mixing

B. The total water is the free water and the amount actually absorbed by the aggregates

C. Neither (a) nor (b)

D. Both (a) and (b)

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In order to obtain the best workability of concrete, the preferred shape of aggregate is

A. Rounded

B. Elongated

C. Angular

D. All of the above

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An aggregate is known as cyclopean aggregate if its size is more than

A. 4.75 mm

B. 30 mm

C. 60 mm

D. 75 mm

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Permissible compressive strength of M 200 concrete grade is

A. 100 kg/cm2

B. 150 kg/cm2

C. 200 kg/cm2

D. 250 kg/cm2

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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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If 20 kg of coarse aggregate is sieved through 80 mm, 40 mm, 20 mm, 10 mm, 4.75 mm, 2.36 mm, 1.18 mm, 600 micron, 300 micron and 150 micron standard sieves and the weights retained are 0 kg, 2 kg, 8 kg, 6 kg, 4 kg respectively, the fineness modulus of the aggregate, is

A. 7.30

B. 7.35

C. 7.40

D. 7.45

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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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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

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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 maximum thickness of concrete floor of a cement warehouse, is

A. 10 cm

B. 15 cm

C. 20 cm

D. 25 cm

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

A. 1/5th of mean dimension

B. 2/5th of mean dimension

C. 3/5th of mean dimension

D. 4/5th of mean dimension

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Water required per bag of cement, is

A. 7 kg

B. 14 kg

C. 21 kg

D. 35 kg

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The type of aggregates of same nominal size, which contain less voids when compacted, are

A. Rounded spherical

B. Irregular

C. Flaky

D. None of these

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Cement used for normal concrete construction, is obtained by burning a mixture of

A. Siliceous and argillaceous materials

B. Argillaceous and calcareous materials

C. Siliceous and calcareous materials

D. Siliceous, argillaceous and calcareous materials

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Finer grinding of cement

A. Affects only the early development of strength

B. Affects only the ultimate strength

C. Both (A) and (B)

D. Does not affect the strength

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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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If the effective working time is 7 hours and per batch time of concrete is 3 minutes, the output of a concrete mixer of 150 litre capacity, is

A. 15,900 litres

B. 16,900 litres

C. 17,900 litres

D. 18,900 litres

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Allowable shear strength of concrete, depends upon

A. Shear strength

B. Tensile strength

C. Compressive strength

D. None of these

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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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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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The ratio of various ingredients (cement, sand, aggregates) in concrete of grade M 200, is

A. 1 : 2 : 4

B. 1 : 3 : 6

C. 1 : 1 ½ : 3

D. 1 : 1 : 2

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If the depth of moist sand in a cylinder is 15 cm and the depth of the sand when fully inundated with water is 12 cm, the bulking of the moist sand, is

A. 10 %

B. 12 %

C. 15 %

D. 25 %

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If X, Y and Z are the fineness modulli of coarse, fine and combined aggregates, the percentage (P) of fine aggregates to combined aggregates, is

A. P = [(Z - X)/(Z - Y)] × 100

B. P = [(X - Z)/(Z - Y)] × 100

C. P = [(X - Z)/(Z + Y)] × 100

D. P = [(Z + X)/(Z - Y)] × 100

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M 150 grade of concrete approximates

A. 1 : 3 : 6 mix

B. 1 : 1 :2 mix

C. 1 : 2 : 4 mix

D. 1 : 1.5 : 3 mix

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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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Select the incorrect statement

A. The loss of pre-stress is more in pre-tensioning system than in posttensioning system.

B. Pre-tensioning system has greater certainty about its durability.

C. For heavy loads and large spans in buildings or bridges, posttensioning system is cheaper than pre-tensioning system

D. None of the above

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The following proportion of the ingredients of concrete mix, is not in conformation to arbitrary method of proportioning

A. 1 : 1 : 2

B. 1 : 2 : 4

C. 1 : 3 : 6

D. 1 : 4 : 10

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Accepted Answer

B. Lower part of the beam

Normally pre-stressing wires are arranged in the

Correct Answer :

Show all Concrete Technology and Design MCQ

Related Questions

For ensuring quality of concrete, use

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

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

Pick up the correct statement from the following:

In order to obtain the best workability of concrete, the preferred shape of aggregate is

An aggregate is known as cyclopean aggregate if its size is more than

Permissible compressive strength of M 200 concrete grade is

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

If 20 kg of coarse aggregate is sieved through 80 mm, 40 mm, 20 mm, 10 mm, 4.75 mm, 2.36 mm, 1.18 mm, 600 micron, 300 micron and 150 micron standard sieves and the weights retained are 0 kg, 2 kg, 8 kg, 6 kg, 4 kg respectively, the fineness modulus of the aggregate, is

Concrete is unsuitable for compaction by a vibrator if it is

While designing an air entrained concrete

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

The maximum thickness of concrete floor of a cement warehouse, is

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

Water required per bag of cement, is

The type of aggregates of same nominal size, which contain less voids when compacted, are

Cement used for normal concrete construction, is obtained by burning a mixture of

Finer grinding of cement

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

If the effective working time is 7 hours and per batch time of concrete is 3 minutes, the output of a concrete mixer of 150 litre capacity, is

Allowable shear strength of concrete, depends upon

To ensure constant moisture content in aggregates

Select the incorrect statement

The ratio of various ingredients (cement, sand, aggregates) in concrete of grade M 200, is

If the depth of moist sand in a cylinder is 15 cm and the depth of the sand when fully inundated with water is 12 cm, the bulking of the moist sand, is

If X, Y and Z are the fineness modulli of coarse, fine and combined aggregates, the percentage (P) of fine aggregates to combined aggregates, is

M 150 grade of concrete approximates

The factor which affects workability, is

Select the incorrect statement

The following proportion of the ingredients of concrete mix, is not in conformation to arbitrary method of proportioning

Also checkout

Normally pre-stressing wires are arranged in the

Correct Answer :

Show all Concrete Technology and Design MCQ

Related Questions

For ensuring quality of concrete, use

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

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

Pick up the correct statement from the following:

In order to obtain the best workability of concrete, the preferred shape of aggregate is

An aggregate is known as cyclopean aggregate if its size is more than

Permissible compressive strength of M 200 concrete grade is

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

If 20 kg of coarse aggregate is sieved through 80 mm, 40 mm, 20 mm, 10 mm, 4.75 mm, 2.36 mm, 1.18 mm, 600 micron, 300 micron and 150 micron standard sieves and the weights retained are 0 kg, 2 kg, 8 kg, 6 kg, 4 kg respectively, the fineness modulus of the aggregate, is

Concrete is unsuitable for compaction by a vibrator if it is

While designing an air entrained concrete

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

The maximum thickness of concrete floor of a cement warehouse, is

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

Water required per bag of cement, is

The type of aggregates of same nominal size, which contain less voids when compacted, are

Cement used for normal concrete construction, is obtained by burning a mixture of

Finer grinding of cement

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

If the effective working time is 7 hours and per batch time of concrete is 3 minutes, the output of a concrete mixer of 150 litre capacity, is

Allowable shear strength of concrete, depends upon

To ensure constant moisture content in aggregates

Select the incorrect statement

The ratio of various ingredients (cement, sand, aggregates) in concrete of grade M 200, is

If the depth of moist sand in a cylinder is 15 cm and the depth of the sand when fully inundated with water is 12 cm, the bulking of the moist sand, is

If X, Y and Z are the fineness modulli of coarse, fine and combined aggregates, the percentage (P) of fine aggregates to combined aggregates, is

M 150 grade of concrete approximates

The factor which affects workability, is

Select the incorrect statement

The following proportion of the ingredients of concrete mix, is not in conformation to arbitrary method of proportioning

Also checkout

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

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