A concrete mass containing 5% of voids
[ A ] Increases its strength by 30%
[ B ] Reduces its strength by 30%
[ C ] Increases its strength by 5%
[ D ] Reduces its strength by 5%

1 Answer

Answer :

[ B ] Reduces its strength by 30%

Related questions

Description : Pick up the correct statement from the following: (A) The quality of water governs the strength of concrete (B) 10% excess of water reduces the strength of concrete by 15% (C) 30% excess of water reduces the strength of concrete by 50% (D) All the above

Last Answer : Answer: Option D

Description : Pick up the correct statement from the following: (A) Quick lime is obtained by burning pure lime stone (B) Hydraulic lime is obtained by burning lime stone containing clay 5% to 30% (C) Poor lime is obtained by burning lime stone containing impurities more than 5% (D) All the above

Last Answer : Answer: Option D

Description : Increase in the moisture content in concrete (A) Reduces the strength (B) Increases the strength (C) Does not change the strength (D) All of the above

Last Answer : Answer: Option A

Description : Pick up the incorrect statement from the following: (A) With passage of time, the strength of cement increases (B) With passage of time, the strength of cement decreases (C) After a ... of cement reduces to 50% (D) The concrete made with storage deteriorated cement, gains strength with time

Last Answer : Answer: Option A

Description : When percentage of mica present in sand is large, it (a) Reduces the strength of mortar, or concrete (b) Increases the strength of mortar or concrete (c) Has no effect on mortar, or concrete strength (d) Enhances the strength of mortar, or concrete, but only marginally

Last Answer : (c) Has no effect on mortar, or concrete strength

Description : Select incorrect statement from the following [ A ] With passage of time, the strength of cement decreases [ B ] With passage of time, the strength of cement increases [ C ] After a period ... cement reduces to 50% [ D ] The concrete made with storage deteriorated cement; gains strength with time.

Last Answer : [ B ] With passage of time, the strength of cement increases

Description : For preparing ordinary concrete, the quantity of water used, is (A) 5% by weight of aggregates plus 20% of weight of cement (B) 10% by weight of aggregates plus 10% of weight of cement (C) ... aggregates plus 30% of weight of cement (D) 30% by weight of aggregates plus 10% of weight of cement

Last Answer : Answer: Option C

Description : 1% of voids in a concrete mix would reduce its strength by about (A) 5 % (B) 10 % (C) 15 % (D) 20 %

Last Answer : (A) 5 %

Description : 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 ... in concrete increases the workability but also increases the liability to segregation (D) All the above

Last Answer : Answer: Option D

Description : Normally, the tensile strength of concrete is about____________of its compressive strength (a) 10 to 15% (b) 15 to 20% (c) 20 to 25% (d) 25 to 30%

Last Answer : (a) 10 to 15%

Description : The tensile strength of concrete is about ________ of its compressive strength [ A ] 10% to 15% [ B ] 30% to 40% [ C ] 50% [ D ] 60% to 75%

Last Answer : [ A ] 10% to 15%

Description : If 30% excess water is added, the strength of concrete is reduced by (a) 30% (b) 40% (c) 50% (d) 60%

Last Answer : (c) 50%

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%

Description : A concrete structure is set on fire and the temperature raises to 1000°C. The strength of concrete as compared to original strength reduces to (A) 10 % (B) 15 % (C) 20 % (D) 25 %

Last Answer : Answer: Option C

Description : Pick up the correct statement from the following: (A) O.M.C. refers to the moisture corresponding to the maximum point on the moisture content dry density curve (B) The line which shows moisture content dry ... void line (C) The free fall of hammer for compaction is 30.5 cm (D) All the above

Last Answer : (D) All the above

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

Description : 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 ... sand and the sand completely flooded with water, have practically the same volume (D) All the above

Last Answer : Answer: Option D

Description : A good brick earth should contain: (A) About 20% to 30% of alumina (B) About 50% to 60% of silica (C) Not more than 5% of lime (D) All the above

Last Answer : Answer: Option D

Description : The percentage of water for normal consistency, is (A) 5% to 15% (B) 10% to 25% (C) 15% to 25% (D) 20% to 30%

Last Answer : Answer: Option C

Description : Sensitivity of a soil can be defined as (A) Percentage of volume change of soil under saturated condition (B) Ratio of compressive strength of unconfined undisturbed soil to that of soil in a remoulded state (C) Ratio of volume of voids to volume of solids (D) None of the above

Last Answer : Answer: Option B

Description : The ultimate consolidation settlement of a structure resting on a soil (A) Decreases with the increase in the initial voids ratio (B) Decreases with the decrease in the plastic limit (C) Increases ... increase in the initial voids ratio (D) Increases with the decrease in the porosity of the soil

Last Answer : Answer: Option A

Description : Effective stress on soil (A) Increases voids ratio and decreases permeability (B) Increases both voids ratio and permeability (C) Decreases both voids ratio and permeability (D) Decreases voids ratio and increases permeability

Last Answer : Answer: Option C

Description : Pick up the correct statement from the following: (A) The concrete gains strength due to hydration of cement (B) The concrete does not set at freezing point (C) The strength of concrete increases with its age (D) All the above

Last Answer : Answer: Option D

Description : The ratio of the volume of water present in a given soil mass to the total volume of its voids, is known (A) Porosity (B) Void ratio (C) Percentage voids (D) Degree of saturation

Last Answer : Answer: Option D

Description : Pick up the incorrect statement from the following. If water cement ratio is (A) Increased, strength of concrete increases (B) Decreased, strength of concrete increases (C) Increased, strength of concrete is not affected (D) None of these

Last Answer : Answer: Option C

Description : 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

Last Answer : (B) Increase in fineness of cement

Description : Air entrainment in the concrete increases (A) Workability (B) Strength (C) The effects of temperature variations (D) The unit weight

Last Answer : (A) Workability

Description : Strength of concrete with passage of time (A) Increases (B) Decreases (C) Fluctuates (D) Remains constant

Last Answer : A

Description : High temperature (A) Increases the strength of concrete (B) Decreases the strength of concrete (C) Has no effect on the strength of concrete (D) None of these

Last Answer : Answer: Option B

Description : The use of air-entraining agents in concretes (a) Increases workability of concrete (b) Decreases bleeding (c) Decreases strength (d) All of these

Last Answer : (d) All of these

Description : The strength of cement concrete increases with (a) The increase of water cement ratio. (b) The decrease of water cement ratio. (c) The increase of cement ratio (d) None of these

Last Answer : (a) The increase of water cement ratio.

Description : Segregation of concrete (a) Increases the strength of concrete (b) Decreased the strength of concrete. (c) Not effect to strength of concrete. (d) None of these.

Last Answer : (b) Decreased the strength of concrete.

Description : Increase in water content in a cement concrete (i) Increases workability (ii) Increases the strength [ A ] i [ B ] ii [ C ] both (i) and (ii) [ D ] neither (i) nor (ii)

Last Answer : [ A ] i

Description : The entrained air in concrete [ A ] Increases the strength [ B ] Decreases the resistance to weathering [ C ] Increases the workability [ D ] Decreases the workability

Last Answer : [ C ] Increases the workability

Description : Select the incorrect statement [ A ] R.C.C has better fire resistance than steel [ B ] R.C.C. structure is economical than steel structure [ C ] Strength of concrete decreases as age increases [ D ] R.C.C can be used for under water and marine structures

Last Answer : [ C ] Strength of concrete decreases as age increases

Description : Voids ratio of a soil mass can (A) Never be greater than unity (B) Be zero (C) Take any value greater than zero (D) Take values between 0 and 1 only

Last Answer : (C) Take any value greater than zero

Description : The ratio of the volume of voids to the volume of soil solids in a given soil mass, is known (A) Porosity (B) Specific gravity (C) Void ratio (D) Water content

Last Answer : (C) Void ratio

Description : The ratio of volume of voids to the total volume of soil mass is called (A) Air content (B) Porosity (C) Percentage air voids (D) Voids ratio

Last Answer : (B) Porosity

Description : If the volume of voids is equal to the volume of solids in a soil mass, then the values of porosity and voids ratio respectively are (A) 1.0 and 0.0 (B) 0.0 and 1.0 (C) 0.5 and 1.0 (D) 1.0 and 0.5

Last Answer : (C) 0.5 and 1.0

Description : The ratio of the volume of voids to the total volume of the given soil mass, is known (A) Porosity (B) Specific gravity (C) Void ratio (D) Water content

Last Answer : (A) Porosity

Description : The water content of soil is defined as the ratio of (A) Volume of water to volume of given soil (B) Volume of water to volume of voids in soil (C) Weight of water to weight of air in voids (D) Weight of water to weight of solids of given mass of soil

Last Answer : Answer: Option D

Description : If the voids of a soil mass are full of air only, the soil is termed as (A) Air entrained soil (B) Partially saturated soil (C) Dry soil (D) Dehydrated soil

Last Answer : Option C

Description : the water content of a fully saturated soil mass is 100%, then the voids ratio of the sample is (A) Less than specific gravity of soil (B) Equal to specific gravity of soil (C) Greater than specific gravity of soil (D) Independent of specific gravity of soil

Last Answer : Answer: Option B

Description : With increase in the carbon percentage in the steel, its (A) Hardness increases (B) Ductility reduces (C) Tensile strength increases (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

Description : The keyway, (A) Reduces strength of shaft (B) Reduces rigidity of shaft (C) Increases stress concentration (D) All of above

Last Answer : (D) All of above

Description : Water is always involved with landslides. This is because it: (A) reduces the shear strength of rocks (B) increases the weight of the overburden (C) enhances chemical weathering (D) is a universal solvent

Last Answer : Answer: B  A landslide is a geological phenomenon that includes a wide range of ground movements. Rockfalls, deep failure of slopes and shallow debris flows were common. Landslides can occur in ... , which destabilize the already fragile slopes. 7) vibrations from machinery or traffic. 8) blasting

Description : The 28 days cube strength of mass concrete using aggregates of maximum size 5 cm for gravity dams should be (A) Between 150 to 300 kg/cm2 (B) Between 350 to 600 kg/cm2 (C) Between 150 to 500 kg/cm2 (D) Below 200 kg/cm2

Last Answer : Answer: Option D

Description : Specific dynamic action of proteins is about (A) 5% (B) 13% (C) 20% (D) 30%

Last Answer : Answer : D

Description : Specific dynamic action of carbohydrates is about (A) 5% (B) 13% (C) 20% (D) 30%

Last Answer : Answer : A

Description : Proteins have the SDA: (A) 5% (B) 10% (C) 20% (D) 30%

Last Answer : Answer : D