Select the incorrect statement

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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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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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Poisson's ratio for concrete

A. Remains constant

B. Increases with richer mixes

C. Decreases with richer mixes

D. None of 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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If fineness modulus of sand is 2.5, it is graded as

A. Very fine sand

B. Fine sand

C. Medium sand

D. Coarse sand

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In a spherical dome subjected to concentrated load at crown or uniformly distributed load, the meridional force is always

A. Zero

B. Tensile

C. Compressive

D. Tensile or compressive

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Too wet concrete may cause

A. Weakness of concrete

B. Excessive laitance

C. Segregation

D. All the above

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The compressive strength of 100 mm cube as compared to 150 mm cube is always

A. Less

B. More

C. Equal

D. None of the above

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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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The load carrying capacity of a helically reinforced column as compared to that of a tied column is about

A. 5 % less

B. 10 % less

C. 5 % more

D. 10 % more

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Strength of concrete with passage of time

A. Increases

B. Decreases

C. Fluctuates

D. Remains constant

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Half of the main steel in a simply supported slab is bent up near the support at a distance of x from the center of slab bearing where x is equal to (Where l is the span)

A. l/3

B. l/5

C. l/7

D. l/10

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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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Workability improved by adding

A. Air-entraining agent

B. Foaming agent

C. Oily-agent

D. All the above

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For quality control of Portland cement, the test essentially done is

A. Setting time

B. Tensile strength

C. Consistency

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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Maximum percentage reinforcement in case of slabs is limited to

A. 2

B. 4

C. 6

D. 8

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If P, Y and Z are the weights of cement, fine aggregates and coarse aggregates respectively and W/C is the water cement ratio, the minimum quantity of water to be added to first batch, is obtained by the equation

A. 0.1P + 0.3Y + 0.1Z = W/C × P

B. 0.3P + 0.1Y + 0.01Z = W/C × P

C. 0.4P + 0.2Y + 0.01Z = W/C × P

D. 0.5P + 0.3Y + 0.01Z = W/C × P

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The internal dimensions of a ware house are 15 m × 5.6 m, and the maximum height of piles is 2.70 m, the maximum number of bags to be stored in two piles, are

A. 1500 bags

B. 2000 bags

C. 2500 bags

D. 3000 bags

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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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Pick up the incorrect statement from the following:

A. A rich mix of concrete possesses higher strength than that a lean mix of desired workability with excessive quantity of water

B. The strength of concrete decreases as the water cement ratio increases

C. Good compaction by mechanical vibrations, increases the strength of concrete

D. None of these

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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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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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For a longitudinal reinforcing bar in a column, the minimum cover shall neither be less than the diameter of bar nor less than

A. 15 mm

B. 25 mm

C. 30 mm

D. 40 mm

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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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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. 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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Which of the following statements is incorrect?

A. Higher Vee-Bee time shows lower workability

B. Higher slump shows higher workability

C. Higher compacting factor shows higher workability

D. None of the above

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Maximum distance between expansion joints in structures as per IS: 456 1978 is

A. 20 m

B. 30 m

C. 45 m

D. 60 m

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If the storey height is equal to length of RCC wall, the percentage increase in strength is

A. 0

B. 10

C. 20

D. 30

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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

Discuss this answer

Accepted Answer

D. None of the above

Select the incorrect statement

Correct Answer :

Show all Concrete Technology and Design MCQ

Related Questions

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

Poisson's ratio for concrete

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

If fineness modulus of sand is 2.5, it is graded as

In a spherical dome subjected to concentrated load at crown or uniformly distributed load, the meridional force is always

Too wet concrete may cause

The compressive strength of 100 mm cube as compared to 150 mm cube is always

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

The load carrying capacity of a helically reinforced column as compared to that of a tied column is about

Strength of concrete with passage of time

Half of the main steel in a simply supported slab is bent up near the support at a distance of x from the center of slab bearing where x is equal to (Where l is the span)

Pick up the correct statement from the following:

Workability improved by adding

For quality control of Portland cement, the test essentially done is

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

Maximum percentage reinforcement in case of slabs is limited to

If P, Y and Z are the weights of cement, fine aggregates and coarse aggregates respectively and W/C is the water cement ratio, the minimum quantity of water to be added to first batch, is obtained by the equation

The internal dimensions of a ware house are 15 m × 5.6 m, and the maximum height of piles is 2.70 m, the maximum number of bags to be stored in two piles, are

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

Pick up the incorrect statement from the following:

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

To ensure constant moisture content in aggregates

For a longitudinal reinforcing bar in a column, the minimum cover shall neither be less than the diameter of bar nor less than

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

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:

Which of the following statements is incorrect?

Maximum distance between expansion joints in structures as per IS: 456 1978 is

If the storey height is equal to length of RCC wall, the percentage increase in strength is

Construction joints are provided

Also checkout

Select the incorrect statement

Correct Answer :

Show all Concrete Technology and Design MCQ

Related Questions

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

Poisson's ratio for concrete

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

If fineness modulus of sand is 2.5, it is graded as

In a spherical dome subjected to concentrated load at crown or uniformly distributed load, the meridional force is always

Too wet concrete may cause

The compressive strength of 100 mm cube as compared to 150 mm cube is always

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

The load carrying capacity of a helically reinforced column as compared to that of a tied column is about

Strength of concrete with passage of time

Half of the main steel in a simply supported slab is bent up near the support at a distance of x from the center of slab bearing where x is equal to (Where l is the span)

Pick up the correct statement from the following:

Workability improved by adding

For quality control of Portland cement, the test essentially done is

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

Maximum percentage reinforcement in case of slabs is limited to

If P, Y and Z are the weights of cement, fine aggregates and coarse aggregates respectively and W/C is the water cement ratio, the minimum quantity of water to be added to first batch, is obtained by the equation

The internal dimensions of a ware house are 15 m × 5.6 m, and the maximum height of piles is 2.70 m, the maximum number of bags to be stored in two piles, are

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

Pick up the incorrect statement from the following:

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

To ensure constant moisture content in aggregates

For a longitudinal reinforcing bar in a column, the minimum cover shall neither be less than the diameter of bar nor less than

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

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:

Which of the following statements is incorrect?

Maximum distance between expansion joints in structures as per IS: 456 1978 is

If the storey height is equal to length of RCC wall, the percentage increase in strength is

Construction joints are provided

Also checkout

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