The property of fresh concrete, in which the water in the mix tends to rise to the surface while placing and compacting, is called (A) Segregation (B) Bleeding (C) Bulking (D) Creep

The property of fresh concrete, in which the water in the mix tends to rise to the surface while
placing and compacting, is called
(A) Segregation
(B) Bleeding
(C) Bulking
(D) Creep
by

1 Answer

Answer :

Answer: Option B
by

Related questions

The property of the ingredients to separate from each other while placing the concrete is called (A) Segregation (B) Compaction (C) Shrinkage (D) Bulking

Description : The property of the ingredients to separate from each other while placing the concrete is called (A) Segregation (B) Compaction (C) Shrinkage (D) Bulking

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The separation of water or water cement mixture from the freshly laid concrete is known as [ A ] Workability [ B ] Segregation [ C ] Bleeding [ D ] Creep

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The continuous strain, which the concrete undergoes due to application of external loads is called [ A ] Creep [ B ] Bleeding [ C ] Workability [ D ] Segregation

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The process of hardening the concrete by keeping its surface moist is known (A) Placing (B) Wetting (C) Curing (D) Compacting

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Excess quantity of water (a) Makes the concrete mix harsh (b) Makes the concrete mix unworkable (c) Causes segregation in concrete (d) Causes bleeding in concrete.

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Insufficient quantity of water (a) Makes the concrete mix harsh (b) Makes the concrete mix unworkable (c) Causes segregation in concrete (d) Causes bleeding in concrete.

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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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The process of mixing, transporting, placing and compacting the cement, concrete should not take more than. (a) 30 minutes (b) 60minutes (c) 90 minutes (d) 120mm

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The increased cohesiveness of concrete, makes it (A) Less liable to segregation (B) More liable to segregation (C) More liable to bleeding (D) More liable for surface scaling in frosty weather

Description : The increased cohesiveness of concrete, makes it (A) Less liable to segregation (B) More liable to segregation (C) More liable to bleeding (D) More liable for surface scaling in frosty weather

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To prevent segregation, the maximum height for placing concrete, is (A) 100 cm (B) 125 cm (C) 150 cm (D) 200 cm

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Pick up the incorrect statement from the following: (A) Concrete for which preliminary tests are conducted, is called controlled concrete (B) Bulking of sand depends upon the fineness of grains (C) Concrete mix 1 : 6 : 12, is used for mass concrete in piers (D) All the above

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Separation of water or water sand cement from a freshly concrete, is known (A) Bleeding (B) Creeping (C) Segregation (D) Flooding

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A concrete using an air entrained cement (A) Has strength less than 10% to 15% (B) Has more resistance to weathering (C) Is more plastic and workable (D) Is free from segregation and bleeding

Description : A concrete using an air entrained cement (A) Has strength less than 10% to 15% (B) Has more resistance to weathering (C) Is more plastic and workable (D) Is free from segregation and bleeding

Last Answer : Answer: Option C

A badly mixed cement concrete results in (A) Segregation (B) Bleeding (C) Honey combing (D) None of these

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Slump cone test is used to determine [ A ] Shrinkage of concrete mix [ B ] Creep of concrete [ C ] Workability of concrete mix [ D ] Soundness of concrete

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For compacting plain concrete road surface of thickness less than 20 cm, we use (A) Internal vibrator (B) Screed vibrator (C) Form vibrator (D) None of these

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Last Answer : Answer: Option B

For compacting plain concrete road surface of thickness less than 20 cm, the following vibrator is used. [ A ] Internal vibrator [ B ] Screed vibrator [ C ] Form vibrator [ D ] None of the above

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While compacting the concrete by a mechanical vibrator, the slump should not exceed (A) 2.5 cm (B) 5.0 cm (C) 7.5 cm (D) 10 cm

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The process of consolidating concrete mix after placing it in position is termed as. (a) Curing (b) Wetting (c) Compaction (d) All of these

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Last Answer : (c) Compaction

Pick up the correct statement from the following: (A) The theory of formation of concrete is based on the phenomena of formation of voids (B) The bulking of sand is taken into account while volumetric proportioning of the aggregates (C) The dry sand and the sand completely flooded with water, have practically the same volume (D) All the above

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The concrete mix which causes difficulty in obtaining a smooth finish, possess (A) Segregation (B) Internal friction (C) Hardness (D) Bleedin

Description : The concrete mix which causes difficulty in obtaining a smooth finish, possess (A) Segregation (B) Internal friction (C) Hardness (D) Bleeding

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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

Description : 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

Last Answer : Answer: Option D

In order to avoid segregation, fresh concrete should be dropped from a height of [ A ] Less than one meter [ B ] Less than two metres [ C ] More than one metre [ D ] More than two metres

Description : In order to avoid segregation, fresh concrete should be dropped from a height of [ A ] Less than one meter [ B ] Less than two metres [ C ] More than one metre [ D ] More than two metres

Last Answer : [ A ] Less than one meter

Explain two causes of each i) Segregation ii) Bleeding of concrete

Description : Explain two causes of each i) Segregation ii) Bleeding of concrete

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For concreting of heavily reinforced sections without vibration, the workability of concrete expressed as compacting factor should be (A) 0.75 - 0.80 (B) 0.80 - 0.85 (C) 0.85 - 0.92 (D) Above 0.92

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The correct proportioning of various ingredients of concrete largely (a) Bulking of sand (b) Water context (c) Absorption (d) All the above

Description : The correct proportioning of various ingredients of concrete largely (a) Bulking of sand (b) Water context (c) Absorption (d) All the above

Last Answer : (d) All the above

When the steel bars are embedded in concrete. The concrete after setting, adheres to the surface of the bars and thus resist any force that tends to pull or push this road. The intensity of this adhesive force is called. (a) Bond stress (b) Shear stress (c) Compressive stress (d) All of these

Description : When the steel bars are embedded in concrete. The concrete after setting, adheres to the surface of the bars and thus resist any force that tends to pull or push this road. The intensity of this adhesive force is called. (a) Bond stress (b) Shear stress (c) Compressive stress (d) All of these

Last Answer : (a) Bond stress

While placing of concrete the thickness of each layer for R.C.C. is [ A ] 150 to 300 mm [ B ] 450 mm [ C ] 500 to 750 mm [ D ] 500 mm

Description : While placing of concrete the thickness of each layer for R.C.C. is [ A ] 150 to 300 mm [ B ] 450 mm [ C ] 500 to 750 mm [ D ] 500 mm

Last Answer : [ A ] 150 to 300 mm

Segregation is responsible for (A) Honey-combed concrete (B) Porous layers in concrete (C) Surface scaling in concrete (D) All the above

Description : Segregation is responsible for (A) Honey-combed concrete (B) Porous layers in concrete (C) Surface scaling in concrete (D) All the above

Last Answer : (D) All the above

Segregation in concrete results in (a) Honey combing (b) Porous Layers (c) Surface scaling (d) All the above

Description : Segregation in concrete results in (a) Honey combing (b) Porous Layers (c) Surface scaling (d) All the above

Last Answer : (d) All the above

Separation of coarse aggregates from mortar during transportation, is known (A) Bleeding (B) Creeping (C) Segregation (D) Shrinkage

Description : Separation of coarse aggregates from mortar during transportation, is known (A) Bleeding (B) Creeping (C) Segregation (D) Shrinkage

Last Answer : Answer: Option C

During the process of hardening of cement, _______ will takes place [ A ] Bleeding [ B ] Segregation [ C ] Hydration [ D ] All the above

Description : During the process of hardening of cement, _______ will takes place [ A ] Bleeding [ B ] Segregation [ C ] Hydration [ D ] All the above

Last Answer : [ C ] Hydration

The process of hardening of concrete in the presence of water is called [ A ] Creep [ B ] Hydration [ C ] Shrinkage [ D ] Curing

Description : The process of hardening of concrete in the presence of water is called [ A ] Creep [ B ] Hydration [ C ] Shrinkage [ D ] Curing

Last Answer : [ B ] Hydration

Define the following special types of concretes with its one use. i) Vacuum concrete ii) Fiber reinforced concrete iii) High performance concrete iv) Self-compacting concrete

Description : Define the following special types of concretes with its one use. i) Vacuum concrete ii) Fiber reinforced concrete iii) High performance concrete iv) Self-compacting concrete

Last Answer : The uses of special types of concretes are as follows.  i) Vacuum concrete: It is the concrete in which entrained air and excess water form concrete mix is taken out from vacuum pump, ... . large bridge and machine foundations iii. Pumped concrete for floors and slabs. iv. Pre-stressed concrete

The lower water cement ratio in concrete, introduces (A) Smaller creep and shrinkage (B) Greater density and smaller permeability (C) Improved frost resistance (D) All the above

Description : The lower water cement ratio in concrete, introduces (A) Smaller creep and shrinkage (B) Greater density and smaller permeability (C) Improved frost resistance (D) All the above

Last Answer : Answer: Option D

Which one of the following statements is not correct with respect to PSC beams? (a) Loss due to shrinkage is proportional to water-cement ratio used in concrete (b) Loss due to creep is proportional to the age of the member at the time of loading. (c) Loss due to elastic deformation is directly proportionally to the modulus of elasticity of concrete (d) Loss due to friction occurs in post tensioned concrete members

Description : Which one of the following statements is not correct with respect to PSC beams? (a) Loss due to shrinkage is proportional to water-cement ratio used in concrete (b) Loss due to creep is ... to the modulus of elasticity of concrete (d) Loss due to friction occurs in post tensioned concrete members

Last Answer : (c) Loss due to elastic deformation is directly proportionally to the modulus of elasticity of concrete

The process of keeping the concrete structure moist is called [ A ] Hydration [ B ] Curing [ C ] Creep [ D ] Shrinkage

Description : The process of keeping the concrete structure moist is called [ A ] Hydration [ B ] Curing [ C ] Creep [ D ] Shrinkage

Last Answer : [ B ] Curing

Pick up the correct statement from the following: (A) Bulking of sand is caused due to formation of a thin film of surface moisture (B) Fine sand bulks more than coarse sand (C) The volume of fully saturated sand, is equal to the volume of dry and loose sand (D) All the above

Description : Pick up the correct statement from the following: (A) Bulking of sand is caused due to formation of a thin film of surface moisture (B) Fine sand bulks more than coarse sand (C) The volume of fully saturated sand, is equal to the volume of dry and loose sand (D) All the above

Last Answer : Answer: Option D

Bulking of sand is caused due to (A) Surface moisture (B) Air voids (C) Viscosity (D) Clay contents

Description : Bulking of sand is caused due to (A) Surface moisture (B) Air voids (C) Viscosity (D) Clay contents

Last Answer : Answer: Option A

Bulking of sand takes place due to [ A ] Surface tension [ B ] Viscosity [ C ] Capillarity [ D ] None of the above

Description : Bulking of sand takes place due to [ A ] Surface tension [ B ] Viscosity [ C ] Capillarity [ D ] None of the above

Last Answer : [ A ] Surface tension

The risk of segregation is more for (A) Wetter mix (B) Larger proportion of maximum size aggregate (C) Coarser grading (D) All the above

Description : The risk of segregation is more for (A) Wetter mix (B) Larger proportion of maximum size aggregate (C) Coarser grading (D) All the above

Last Answer : Answer: Option D

After pre-stressing process is completed, a loss of stress is due to (A) Shrinkage of concrete (B) Elastic shortening of concrete (C) Creep of concrete (D) All the above

Description : After pre-stressing process is completed, a loss of stress is due to (A) Shrinkage of concrete (B) Elastic shortening of concrete (C) Creep of concrete (D) All the above

Last Answer : Answer: Option D

If C is creep coefficient, f is original pre-stress in concrete, m is modular ratio, E is Young's modulus of steel and e is shrinkage strain, the combined effect of creep and shrinkage is: (A) (1 - C)mf - eEB) (C - 1)mf + eE(C) (C - 1)mf - eE(D) (1 - C)mf + eE

Description : If C is creep coefficient, f is original pre-stress in concrete, m is modular ratio, E is Young's modulus of steel and e is shrinkage strain, the combined effect of creep and shrinkage is: (A) (1 - C)mf - eE B) (C - 1)mf + eE (C) (C - 1)mf - eE (D) (1 - C)mf + eE

Last Answer : Answer: Option B

Which of the following losses of pre-stress occurs only in pre-tensioning and not in posttensioning? (A) Elastic shortening of concrete (B) Shrinkage of concrete (C) Creep of concrete (D) Loss due to frictio

Description : Which of the following losses of pre-stress occurs only in pre-tensioning and not in posttensioning? (A) Elastic shortening of concrete (B) Shrinkage of concrete (C) Creep of concrete (D) Loss due to friction

Last Answer : Answer: Option A

For the supply of materials for concrete, form work reinforcing and placing of concrete, removal of form work and curing of concrete, number of bar(s) required on bar chart, is (A) 1 (B) 2 (C) 3 (D) 4

Description : For the supply of materials for concrete, form work reinforcing and placing of concrete, removal of form work and curing of concrete, number of bar(s) required on bar chart, is (A) 1 (B) 2 (C) 3 (D) 4

Last Answer : (A) 1

Consider the following operations: 1. Drilling 2. Blasting 3. Mucking 4. Placing steel 5. Placing concrete The correct sequence of these operations in tunnel construction is (A) 1, 2, 4, 3, 5 (B) 1, 3, 2, 4, 5 (C) 1, 2, 3, 4, 5 (D) 1, 3, 4, 2,

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Last Answer : (C) 1, 2, 3, 4, 5

The process of keeping concrete moist for a certain period after its finishing, is known as (A) Finishing of concrete (B) Curing of concrete (C) Placing of concrete (D) Compaction of concrete

Description : The process of keeping concrete moist for a certain period after its finishing, is known as (A) Finishing of concrete (B) Curing of concrete (C) Placing of concrete (D) Compaction of concrete

Last Answer : Answer: Option B

The removal of excess air after placing concrete helps in increasing the strength of concrete by (a) 15 to 20% (b) 20 to 30% (c) 30 to 50% (d) 50 to 70%

Description : The removal of excess air after placing concrete helps in increasing the strength of concrete by (a) 15 to 20% (b) 20 to 30% (c) 30 to 50% (d) 50 to 70%

Last Answer : (a) 15 to 20%

Too wet concrete may cause (A) Weakness of concrete (B) Excessive laitance (C) Segregation (D) All the above

Description : Too wet concrete may cause (A) Weakness of concrete (B) Excessive laitance (C) Segregation (D) All the above

Last Answer : (D) All the above

Pick up the correct statement from the following: (A) Continuous grading is not necessary for obtaining a minimum of air voids (B) The omission of a certain size of aggregate is shown by a straight horizontal line on the grading curve (C) The omission of a certain size of aggregate in concrete increases the workability but also increases the liability to segregation (D) All the above

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Last Answer : Answer: Option D