The bulk density of aggregates, is generally expressed as

Question

The bulk density of aggregates, is generally expressed as

A. Tonnes/cubic metre

B. kg/cubic metre

C. kg/litre

D. g/cm3

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Which of the following losses of pre-stress occurs only in pretensioning and not in post-tensioning?

A. Elastic shortening of concrete

B. Shrinkage of concrete

C. Creep of concrete

D. Loss due to friction

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For preparing a test-specimen, it is necessary

A. To mix cement and fine aggregate by dry hand

B. To mix coarse aggregates

C. To mix water to the cement, fine aggregates and coarse aggregates

D. All the above

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In reinforced concrete footing on soil, the minimum thickness at edge should not be less than

A. 100 mm

B. 150 mm

C. 200 mm

D. 250 mm

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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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Addition of pozzolana to cement

A. Decreases workability

B. Increases strength

C. Increases heat of hydration

D. None of these

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Curing

A. Reduces the shrinkage of concrete

B. Preserves the properties of concrete

C. Prevents the loss of water by evaporation

D. All of the above

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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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The percentage of reinforcement in case of slabs, when high strength deformed bars are used is not less than

A. 0.15

B. 0.12

C. 0.30

D. 1.00

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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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The cement whose strength is a little lower than the ordinary cement during the first three months but attains afterwards the same strength, is known as

A. Low-heat Portland cement

B. Rapid hardening Portland cement

C. Portland blast slag cement

D. Portland pozzolana cement

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Admixtures which cause early setting and hardening of concrete are called

A. Workability admixtures

B. Accelerators

C. Retarders

D. Air entraining agents

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The mixture of different ingredients of cement, is burnt at

A. 1000°C

B. 1200°C

C. 1400°C

D. 1600°C

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Pozzolana cement is used with confidence for construction of

A. Dams

B. Massive foundations

C. R.C.C. structures

D. All the above

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For a good concrete

A. Aggregates should be hard and durable

B. Water should be free from organic materials

C. Cement should be sufficient to produce the required strength

D. All the above

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Segregation is responsible for

A. Honey-combed concrete

B. Porous layers in concrete

C. Surface scaling in concrete

D. All the above

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The minimum diameter of longitudinal bars in a column is

A. 6 mm

B. 8 mm

C. 12 mm

D. 16 mm

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The produce impermeable concrete

A. Thorough mixing of concrete is required

B. Proper compaction of concrete is required

C. Proper curing of concrete is required

D. All the above

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M10 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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For an ordinary Portland cement

A. Residual does not exceed 10% when sieved through IS Sieve No. 9

B. Soundness varies from 5 to 10 mm

C. Initial setting time is not less than 30 minutes

D. Compressive stress after 7 days, is not less than 175 kg/cm²

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Concrete mainly consists of

A. Cement

B. Aggregates

C. Water

D. All the above

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Ordinary Portland cement is manufactured from

A. Lime stone and clay

B. Gypsum and lime

C. Pozzolana

D. Lime, pozzolana and clay

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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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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

Discuss this answer

Pick up the correct statement from the following:

A. Calcium chloride acts as a retarder

B. Calcium chloride acts as an accelerator

C. Gypsum (calcium sulphate) acts as a retarder

D. Both (b) and (c)

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Strength of concrete increases with

A. Increase in water-cement ratio

B. Increase in fineness of cement

C. Decrease in curing time

D. Decrease in size of aggregate

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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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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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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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Shrinkage of concrete depends upon
(i) Humidity of atmosphere
(ii) Passage of time
(iii) Stress The correct answer is

A. (i) and (ii)

B. (ii) and (iii)

C. Only (iii)

D. All (i), (ii) and (iii)

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'Ware house pack' of cement means

A. Full capacity of the ware house

B. Pressure exertion of the bags of upper layers

C. Pressure compaction of the bags on lower layers

D. Packing the ware house

Discuss this answer

Accepted Answer

C. kg/litre

The bulk density of aggregates, is generally expressed as

Correct Answer :

Show all Concrete Technology and Design MCQ

Related Questions

Which of the following losses of pre-stress occurs only in pretensioning and not in post-tensioning?

For preparing a test-specimen, it is necessary

In reinforced concrete footing on soil, the minimum thickness at edge should not be less than

Select the incorrect statement

Addition of pozzolana to cement

Curing

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

The percentage of reinforcement in case of slabs, when high strength deformed bars are used is not less than

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

The cement whose strength is a little lower than the ordinary cement during the first three months but attains afterwards the same strength, is known as

Admixtures which cause early setting and hardening of concrete are called

The mixture of different ingredients of cement, is burnt at

Pozzolana cement is used with confidence for construction of

For a good concrete

Segregation is responsible for

The minimum diameter of longitudinal bars in a column is

The produce impermeable concrete

M10 grade of concrete approximates

For an ordinary Portland cement

Concrete mainly consists of

Ordinary Portland cement is manufactured from

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

Pick up the correct statement from the following:

Pick up the correct statement from the following:

Strength of concrete increases with

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

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

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)

Shrinkage of concrete depends upon
(i) Humidity of atmosphere
(ii) Passage of time
(iii) Stress The correct answer is

'Ware house pack' of cement means

Also checkout

The bulk density of aggregates, is generally expressed as

Correct Answer :

Show all Concrete Technology and Design MCQ

Related Questions

Which of the following losses of pre-stress occurs only in pretensioning and not in post-tensioning?

For preparing a test-specimen, it is necessary

In reinforced concrete footing on soil, the minimum thickness at edge should not be less than

Select the incorrect statement

Addition of pozzolana to cement

Curing

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

The percentage of reinforcement in case of slabs, when high strength deformed bars are used is not less than

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

The cement whose strength is a little lower than the ordinary cement during the first three months but attains afterwards the same strength, is known as

Admixtures which cause early setting and hardening of concrete are called

The mixture of different ingredients of cement, is burnt at

Pozzolana cement is used with confidence for construction of

For a good concrete

Segregation is responsible for

The minimum diameter of longitudinal bars in a column is

The produce impermeable concrete

M10 grade of concrete approximates

For an ordinary Portland cement

Concrete mainly consists of

Ordinary Portland cement is manufactured from

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

Pick up the correct statement from the following:

Pick up the correct statement from the following:

Strength of concrete increases with

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

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

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)

Shrinkage of concrete depends upon (i) Humidity of atmosphere (ii) Passage of time (iii) Stress The correct answer is

'Ware house pack' of cement means

Also checkout

Shrinkage of concrete depends upon
(i) Humidity of atmosphere
(ii) Passage of time
(iii) Stress The correct answer is