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4

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

Correct Answer :

C. 45 m


Related Questions

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4

Ultimate strength of cold drawn high steel wires

A. Increases with increase in diameter of bar

B. Decreases with increase in diameter of bar

C. Does not depend on diameter of bar

D. None of the above

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4

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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4

Batching error means inaccuracy in the quantity of

A. Aggregates

B. Cement

C. Water

D. All the above

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4

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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4

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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4

The permissible diagonal tensile stress in reinforced brick work is

A. About 0.1 N/mm²

B. Zero

C. 0.3 N/mm² to 0.7 N/mm²

D. About 1.0 N/mm²

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4

According to I.S. : 456, the number of grades of concrete mixes, is

A. 3

B. 4

C. 5

D. 7

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4

The rock which is not calcareous, is:

A. Lime stone

B. Chalk

C. Laterite

D. None of these

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4

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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4

For the construction of cement concrete floor, the maximum permissible size of aggregate, is

A. 4 mm

B. 6 mm

C. 8 mm

D. 10 mm

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4

Pick up the correct statement from the following:

A. Cement should be mixed for at least one minute

B. 10% of water is placed in the rotating drum before adding dry material

C. 10% of water is added after placing the other ingredients in the drum

D. All the above

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4

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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4

In working stress design, permissible bond stress in the case of deformed bars is more than that in plain bars by

A. 10 %

B. 20 %

C. 30 %

D. 40 %

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4

For given workability the grading requiring the least amount of water is one that gives

A. Greatest surface area for the given cement and aggregates

B. Least surface area for the given cement and aggregates

C. Least weight for the given cement and aggregates

D. Greatest weight for the given cement and aggregates

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4

Inert material of a cement concrete mix, is

A. Water

B. Cement

C. Aggregate

D. None of these

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4

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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4

To hydrate 500kg of cement full water needed, is

A. 100 kg

B. 110 kg

C. 120 kg

D. 130 kg

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4

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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4

The load factors for live load and dead load are taken respectively as

A. 1.5 and 2.2

B. 2.2 and 1.5

C. 1.5 and 1.5

D. 2.2 and 2.2

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4

The entrained air in concrete

A. Increases workability

B. Decreases workability

C. Decreases resistance to weathering

D. Increases strength

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4

Gypsum is added for

A. Colour

B. Strength

C. Controlling setting time

D. None of these

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4

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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4

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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4

Diagonal tension in a beam

A. Is maximum at neutral axis

B. Decreases below the neutral axis and increases above the neutral axis

C. Increases below the neutral axis and decreases above the neutral axis

D. Remains same

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4

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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4

Horizontal construction joints in concrete walls are generally provided at

A. Soffit level

B. Window sill level

C. Floor level

D. All the above

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4

According to IS: 4561978, the column or the strut is the member whose effective length is greater than

A. The least lateral dimension

B. 2 times the least lateral dimension

C. 3 times the least lateral dimension

D. 4 times the least lateral dimension

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4

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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4

Minimum pitch of transverse reinforcement in a column is

A. The least lateral dimension of the member

B. Sixteen times the smallest diameter of longitudinal reinforcement bar to be tied

C. Forty-eight times the diameter of transverse reinforcement

D. Lesser of the above three values

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4

The average permissible stress in bond for plain bars in tension is

A. Increased by 10% for bars in compression

B. Increased by 25% for bars in compression

C. Decreased by 10% for bars in compression

D. Decreased by 25% for bars in compression