Workability improved by adding (A) Air-entraining agent (B) Foaming agent (C) Oily-agent (D) All the above

Workability improved by adding
(A) Air-entraining agent
(B) Foaming agent
(C) Oily-agent
(D) All the above
by

1 Answer

Answer :

(D) All the abov
by

Related questions

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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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 workability of concrete can be improved by adding (a) Hydrated lime (b) Fly ash (c) Calcium chloride (d) All the above

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The strength of concrete using air entraining cement gets reduced by (a) 5 to 10% (b) 10 to 15% (c) 15 to 20% (d) 20 to 25%

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A member which is subjected to reversible tensile or compressive stress may fail at a stress lower than the ultimate stress of the material. This property of metal, is called (A) Plasticity of the metal (B) Elasticity of the metal (C) Fatigue of the metal (D) Workability of the metal

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Proper batching ensures (A) Economy (B) Durability (C) Workability (D) All the above

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Grading of sand causes great variation in (A) Workability of concrete (B) Strength of concrete (C) Durability of concrete (D) All the above

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For given water content, workability decreases if the concrete aggregates contain an excess of (A) Thin particles (B) Flat particles (C) Elongated particles (D) All the above

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Wp and Wf are the weights of a cylinder containing partially compacted and fully compacted concrete. If the compaction factor (Wp/Wf ) is 0.95, the workability of concrete is (A) Extremely low (B) Very low (C) Low (D) High

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Proper proportioning of concrete, ensures (A) Desired strength and workability (B) Desired durability (C) Water tightness of the structure (D) All the above

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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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If the slump of a concrete mix is 60 mm, its workability is (A) Very low (B) Low (C) Medium (D) High

Description : If the slump of a concrete mix is 60 mm, its workability is (A) Very low (B) Low (C) Medium (D) High

Last Answer : Answer: Option C

Addition of pozzolana to cement (A) Decreases workability (B) Increases strength (C) Increases heat of hydration (D) None of these

Description : Addition of pozzolana to cement (A) Decreases workability (B) Increases strength (C) Increases heat of hydration (D) None of these

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Higher workability of concrete is required if the structure is (A) Made with cement concrete (B) Thick and reinforced (C) Thin and heavily reinforced (D) Thick and heavily reinforced

Description : Higher workability of concrete is required if the structure is (A) Made with cement concrete (B) Thick and reinforced (C) Thin and heavily reinforced (D) Thick and heavily reinforced

Last Answer : Answer: Option D

Pick up the correct statement from the following: (A) Higher workability indicates unexpected increase in the moisture content (B) Higher workability indicates deficiency of sand (C) If the concrete mix is dry, the slump is zero (D) All the above

Description : Pick up the correct statement from the following: (A) Higher workability indicates unexpected increase in the moisture content (B) Higher workability indicates deficiency of sand (C) If the concrete mix is dry, the slump is zero (D) All the above

Last Answer : Answer: Option D

As compared to ordinary Portland cement, use of pozzolana cement (A) Reduces workability (B) Increases bleeding (C) Increases shrinkage (D) Increases strength

Description : As compared to ordinary Portland cement, use of pozzolana cement (A) Reduces workability (B) Increases bleeding (C) Increases shrinkage (D) Increases strength

Last Answer : Answer: Option C

Pick up the correct statement from the following: (A) An increase in water content must be accompanied by an increase in cement content (B) Angular and rough aggregates reduce the workability of the concrete (C) The slump of the concrete mix decreases due to an increase in temperature (D) All the above

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Last Answer : Answer: Option D

C.R.R.I. charts are used to obtain a relationship between strength of concrete and (A) Water cement ratio (B) Workability (C) Grading of aggregate (D) Fineness modulus

Description : C.R.R.I. charts are used to obtain a relationship between strength of concrete and (A) Water cement ratio (B) Workability (C) Grading of aggregate (D) Fineness modulus

Last Answer : Answer: Option A

Workability of concrete is measured by (A) Vicat apparatus test (B) Slump test (C) Minimum void method (D) Talbot Richa

Description : Workability of concrete is measured by (A) Vicat apparatus test (B) Slump test (C) Minimum void method (D) Talbot Richa

Last Answer : Answer: Option B

The maximum amount of dust which may be permitted in aggregates is (A) 5% of the total aggregates for low workability with a coarse grading (B) 10% of the total aggregates for low workability with a fine grading (C) 20% of the total aggregates for a mix having high workability with fine grading (D) All the above

Description : The maximum amount of dust which may be permitted in aggregates is (A) 5% of the total aggregates for low workability with a coarse grading (B) 10% of the total aggregates for low workability with ... of the total aggregates for a mix having high workability with fine grading (D) All the above

Last Answer : Answer: Option D