121 + Interview Questions in Special Concrete And Concreting Methods in Concrete Technology Page 2 InterviewSolution

51.	The removal of excess air after placing concrete helps in increasing the strength of concrete by ___________(a) 15-20%(b) 20-25%(c) 30-50%(d) 50-70%I have been asked this question in a job interview.My enquiry is from Light Weight Concrete topic in portion Special Concrete and Concreting Methods of Concrete Technology
Answer» Correct answer is (a) 15-20% Best explanation: The removal of excess air after placing concrete helps in increasing the strength of concrete by 15-20%. To ATTAIN these positive effects, the typical INDIVIDUAL limitation for OPC replacement is COMMONLY estimated to be 15–20% for FA and 40–50% for GGBS.

Discussion

52.	No fines concrete is manufactured by _____________(a) By adding no fines materials from normal concrete(b) By eliminating no fines materials from normal concrete(c) By reducing its strength(d) By increasing its strengthThe question was posed to me in an interview for job.My query is from Special Concrete in chapter Special Concrete and Concreting Methods of Concrete Technology
Answer» The correct answer is (b) By eliminating no FINES materials from normal CONCRETE The explanation is: No fines concrete is one type of light weight concrete. As the name indicates that it is a concrete mix WITHOUT FINE aggregate or sand.

Discussion

53.	The __________ compressive strength required from structural consideration.(a) Nominal(b) Minimum(c) Maximum(d) NoI had been asked this question in an interview for job.The question is from Mix Design in section Special Concrete and Concreting Methods of Concrete Technology
Answer» Right choice is (b) Minimum The best EXPLANATION: Option d can be eliminated easily because we need atleast some compressive strength. The minimum compressive strength required from STRUCTURAL CONSIDERATION.

Discussion

54.	The addition of glass fibers are in the range of __________(a) 0-6%(b) 10%(c) 15-20%(d) 20%-25%I got this question in my homework.I would like to ask this question from Factors Affecting PIC, Cold Weather Concreting topic in division Special Concrete and Concreting Methods of Concrete Technology
Answer» Right option is (a) 0-6% EASIEST EXPLANATION: Most of the studies have reported the addition of GLASS fibers are in the range of 0-6% in PIC.

Discussion

55.	The moisture content of the aggregate shall not exceed from ____________(a) .1% – .5%(b) 1% – 55(c) 10% – 50%(d) 15%This question was addressed to me in an interview.My question is taken from Factors Affecting PIC, Cold Weather Concreting topic in portion Special Concrete and Concreting Methods of Concrete Technology
Answer» The correct CHOICE is (a) .1% – .5% Best explanation: It was recommend by the scientist later on that the moisture CONTENT of the aggregates shall not exceed from .1% to .5%.

Discussion

56.	What is the 10 day bending young’s modulus in N/mm^2?(a) 40(b) 1500(c) 3.4(d) 180The question was asked in a national level competition.This interesting question is from Concrete Cloth, Polymer Impregnated Concrete in section Special Concrete and Concreting Methods of Concrete Technology
Answer» Correct choice is (d) 180 To explain: This test is based on BS EN 12467:2004 and the 10 day BENDING YOUNG’s modulus is 180 N/mm^2.

Discussion

57.	___________ mm thickness is not available in concrete cloth.(a) 5(b) 8(c) 13(d) 18The question was asked in semester exam.Origin of the question is Concrete Cloth, Polymer Impregnated Concrete in chapter Special Concrete and Concreting Methods of Concrete Technology
Answer» Correct option is (d) 18 For explanation I would SAY: Concrete cloth is usually available in 3 thicknesses i.e., 5mm, 8mm and 13 MM whereas theoretically there is no limit in the thickness of concrete cloth and TYPICAL thickness lies in 2mm to 15 mm.

Discussion

58.	What is the 10 day compressive young’s modulus in N/mm^2?(a) 40(b) 1500(c) 3.4(d) 180The question was posed to me in class test.Question is from Concrete Cloth, Polymer Impregnated Concrete topic in portion Special Concrete and Concreting Methods of Concrete Technology
Answer» CORRECT choice is (b) 1500 The BEST explanation: This test is BASED on ASTM C473 – 07 and the 10 day COMPRESSIVE young’s modulus is 1500 N/mm^2.

Discussion

59.	The compressive strength of no fines concrete varies between __________(a) 0-5 MPa(b) 4-14 MPa(c) 25 MPa(d) >15 MPaThe question was posed to me in exam.I need to ask this question from No Fines Concrete, High Density Concrete topic in division Special Concrete and Concreting Methods of Concrete Technology
Answer» Right ANSWER is (B) 4-14 MPa The BEST I can explain: The COMPRESSIVE strength of no fines CONCRETE varies between the ranges of 4MPa to 14 MPa.

Discussion

60.	Aerated Concrete is ______________(a) Very heavy weight(b) Heavy weight(c) Medium weight(d) Light weightI had been asked this question in an interview for internship.This intriguing question comes from Special Concrete topic in division Special Concrete and Concreting Methods of Concrete Technology
Answer» The CORRECT answer is (d) LIGHT weight Explanation: Aerated concrete is ALSO referred to as gas concrete, foam concrete, CELLULAR concrete. In India, we have at PRESENT a few factories manufacturing aerated concrete.

Discussion

61.	Compressive strength of hardened concrete is done by _______(a) Cube test(b) Tensile splitting test(c) Concrete core test(d) Flexure testI got this question in final exam.My question is based upon Various Testing Methods in chapter Special Concrete and Concreting Methods of Concrete Technology
Answer» The correct choice is (a) CUBE test For EXPLANATION: Compressive strength of hardened CONCRETE is DONE by cube test. For cube test two TYPES of specimens either cubes of 15cm X 15cm X 15cm or 10cm X 10cm x 10cm depending upon the size of aggregate are used.

Discussion

62.	A ___________ paste structure undergoes ___________ creep.(a) Good, high(b) Poor, high(c) Good, average(d) Poor, lowI got this question by my college professor while I was bunking the class.This question is from Complexity in Special Concrete, India in SCC topic in section Special Concrete and Concreting Methods of Concrete Technology
Answer» Right answer is (b) Poor, high Best explanation: The amount of paste CONTENT and its QUALITY is one of the most important FACTORS influencing CREEP. A poorer paste structure UNDERGOES higher creep.

Discussion

63.	Water-filled voids ranges from _______ % of the total volume of the component for gap-graded concrete.(a) 5(b) 15(c) 10(d) 20I got this question during an online interview.My question is taken from Concrete Cloth, Polymer Impregnated Concrete topic in portion Special Concrete and Concreting Methods of Concrete Technology
Answer» The correct option is (b) 15 To EXPLAIN I would SAY: Water-filled voids ranges from 15 % of the total VOLUME of the component for gap-graded CONCRETE where as 5 % is for dense concrete.

Discussion

64.	Water-filled voids ranges from _______ % of the total volume of the component for dense concrete.(a) 5(b) 15(c) 10(d) 20I got this question during an online interview.Question is from Concrete Cloth, Polymer Impregnated Concrete topic in division Special Concrete and Concreting Methods of Concrete Technology
Answer» Correct answer is (a) 5 The explanation is: Water-filled VOIDS ranges from 5 % of the TOTAL VOLUME of the component for dense concrete where as 15 % is for gap-graded concrete.

Discussion

65.	What is the linear coefficient of thermal expansibility for this concrete in 10^-6/K?(a) 8-12(b) 8-10(c) 10-15(d) 12-15The question was asked in my homework.I'm obligated to ask this question of Sulphur Infiltrated Concrete, FRC topic in division Special Concrete and Concreting Methods of Concrete Technology
Answer» CORRECT answer is (a) 8-12 To explain: 810^-6/K to 1210^-6/K is the linear COEFFICIENT of thermal expansibility for sulphur infiltered CONCRETE where as 810^-6/K to 1010^-6/K is for OPC.

Discussion

66.	Maximum size of aggregates are used to produce 70MPa compressive strength?(a) 20-30 mm(b) 10-20 mm(c) 30-40 mm(d) 40-50 mmI have been asked this question in an internship interview.This intriguing question comes from No Fines Concrete, High Density Concrete topic in division Special Concrete and Concreting Methods of Concrete Technology
Answer» Right CHOICE is (a) 20-30 MM The explanation is: Maximum SIZE of aggregates is 20-30 mm are used to PRODUCE 70MPa compressive STRENGTH.

Discussion

67.	The density of concrete made with saturated aggregate is ___________(a) High(b) Low(c) Very high(d) Very lowThe question was asked in a national level competition.Asked question is from Mix Design of LWC, Aerated Concrete in division Special Concrete and Concreting Methods of Concrete Technology
Answer»

Discussion

68.	A higher temperature of fresh concrete results in a __________ hydration of cement.(a) More rapid(b) Rapid(c) Low(d) Very lowThe question was asked in unit test.Asked question is from Hot Weather Concreting, Prepacked and Vacuum Cement in portion Special Concrete and Concreting Methods of Concrete Technology
Answer» Correct choice is (a) More RAPID Explanation: A higher temperature of fresh CONCRETE results in a more rapid HYDRATION of cement and leads to REDUCED workability/ ACCELERATED setting.

Discussion

69.	Identify the type of destructive testing.(a) Radiographic test(b) Dye penetrant test(c) Creep test(d) Visual testingThis question was posed to me by my school teacher while I was bunking the class.The origin of the question is Various Testing Methods topic in chapter Special Concrete and Concreting Methods of Concrete Technology
Answer» Correct OPTION is (c) Creep test To EXPLAIN: Creep test is a type of DESTRUCTIVE test. It is defined as slow plastic DEFORMATION at high temperatures for a longer time under constant stresses. Creep OCCURS at room temperature and at high temperatures.

Discussion

70.	Why the time period for removal of form work has to be increased.(a) The development of strength of concrete is retarded compared with development at normal temperature(b) The development of strength of concrete is accelerate compared with development at normal temperature(c) The development of strength of concrete is advanced compared with development at normal temperature(d) The development of strength of concrete is precocious compared with development at normal temperatureThis question was posed to me during an interview.This key question is from Factors Affecting PIC, Cold Weather Concreting topic in chapter Special Concrete and Concreting Methods of Concrete Technology
Answer» Right choice is (a) The development of strength of CONCRETE is RETARDED compared with development at normal temperature The EXPLANATION is: When the temperature is falling to about 50C or below, the development of strength of concrete is retarded compared with development at normal temperature. Thus, the time PERIOD for removal of FORM work has to be increased.

Discussion

71.	Due to low w/c ratio _____________(a) It doesn’t cause any problems(b) It causes problems(c) Workability is easy(d) Strength is moreI have been asked this question during an interview.My question is from No Fines Concrete, High Density Concrete topic in division Special Concrete and Concreting Methods of Concrete Technology
Answer» The correct ANSWER is (b) It causes problems The BEST I can EXPLAIN: Due to LOW water cement RATIO, it causes many problems that’s why superplasticizers are used.

Discussion

72.	Air contents should be _________ % by volume.(a) 1-2(b) 2-3(c) 3-4(d) 4-5The question was asked by my school teacher while I was bunking the class.My question is based upon Mix Design of LWC, Aerated Concrete topic in portion Special Concrete and Concreting Methods of Concrete Technology
Answer» Correct answer is (c) 3-4 Explanation: This type of CEMENT was first of all developed in U.S.A. It is RECOMMENDED that AIR contents should be 03-04 % by VOLUME.

Discussion

73.	Polypropylene fibers is hydrophobic in nature.(a) True(b) FalseThis question was posed to me in an interview for job.I'm obligated to ask this question of Sulphur Infiltrated Concrete, FRC topic in portion Special Concrete and Concreting Methods of Concrete Technology
Answer» Right option is (a) True The explanation: POLYPROPYLENE FIBERS is hydrophobic in NATURE that’s why they can be EASILY mixed as they do not NEED long time during mixing.

Discussion

74.	Which of the following are the advantages of this concrete?(a) Low density(b) Low strength(c) It can’t be use in RCC structure(d) Cannot be measured by any available standard methodsThis question was addressed to me in a national level competition.The origin of the question is No Fines Concrete, High Density Concrete topic in section Special Concrete and Concreting Methods of Concrete Technology
Answer» Right OPTION is (a) Low DENSITY To explain: DUE to low density i.e., it is light weight which is good for our construction purpose because it will be EASY to transport.

Discussion

75.	In bridges, HDC is used.(a) True(b) FalseThe question was posed to me during an interview for a job.I'd like to ask this question from Special Concrete in division Special Concrete and Concreting Methods of Concrete Technology
Answer» The correct CHOICE is (a) True To explain I would say: In BRIDGES, High Density Concrete is being USED to reduce the number of BEAMS for supporting SPAN.

Discussion

76.	After finishing concrete surface must be kept __________(a) Dry(b) First dry it and then wet it(c) First wet it and then dry it(d) WetThis question was addressed to me in examination.My question is from Complexity in Special Concrete, India in SCC in division Special Concrete and Concreting Methods of Concrete Technology
Answer» RIGHT CHOICE is (d) WET To explain: After finishing concrete surface MUST be kept wet, so that it’d be prevented from EVAPORATION.

Discussion

77.	Which one is not the polymeric resin?(a) Polyester resin(b) Epoxy resin(c) Vinyl ester resin(d) SulphatesThe question was asked in my homework.My query is from Factors Affecting PIC, Cold Weather Concreting in section Special Concrete and Concreting Methods of Concrete Technology
Answer» Right answer is (d) Sulphates The explanation: POLYMERIC RESINS that are commonly used in polymer concrete are methacrylate, polyester RESIN, epoxy resin, VINYL ester resin, and FURAN resins.

Discussion

78.	What is the time required to give heating to remove the moisture from the concrete?(a) 6-8 hrs(b) 10 hrs(c) 24 hrs(d) 48 hrsI had been asked this question by my college director while I was bunking the class.The above asked question is from Concrete Cloth, Polymer Impregnated Concrete topic in division Special Concrete and Concreting Methods of Concrete Technology
Answer» Correct answer is (a) 6-8 hrs For explanation I WOULD say: 6 to 8 hours are MUST to give HEAT supply to REMOVE the moisture from the Polymer Impregnated Concrete.

Discussion

79.	Glass fiber is made up from _______ individual filaments.(a) 100-200(b) 200-400(c) 500(d) >500I got this question in examination.Question is from Sulphur Infiltrated Concrete, FRC topic in portion Special Concrete and Concreting Methods of Concrete Technology
Answer» Correct option is (b) 200-400 The explanation: Glass fiber is made up from 200-400 individual FILAMENTS which are loosely BONDED to MAKE up a single stand. These STANDS can be chopped into various lengths, or combined to make cloth mat or tape.

Discussion

80.	What is the value of modulus of elasticity?(a) 60-115 MPa(b) 10-16 MPa(c) 35-50 GPa(d) 500 GPaI had been asked this question in semester exam.This question is from Sulphur Infiltrated Concrete, FRC topic in section Special Concrete and Concreting Methods of Concrete Technology
Answer» CORRECT OPTION is (c) 35-50 GPa For explanation I would say: 35-60 GPa is the range of modulus of elasticity for the Sulphur infiltered concrete whereas the OPC has the range of 25-28 GPa.

Discussion

81.	Maximum size of aggregates are used to produce 100MPa compressive strength?(a) 20-30 mm(b) 10-20 mm(c) 30-40 mm(d) 40-50 mmI got this question during an interview.My doubt stems from No Fines Concrete, High Density Concrete in chapter Special Concrete and Concreting Methods of Concrete Technology
Answer» The correct CHOICE is (b) 10-20 mm Easiest EXPLANATION: Maximum size of aggregates is 10-20 mm are used to PRODUCE 100MPa COMPRESSIVE strength.

Discussion

82.	Light weight cement content for compressive strength 2500 psi is _______ pounds per cubic yard.(a) 400-510(b) 440-560(c) 530-660(d) 630-750The question was asked during an internship interview.I'd like to ask this question from Structural Light Weight Concrete topic in portion Special Concrete and Concreting Methods of Concrete Technology
Answer» Correct option is (a) 400-510 The best I can EXPLAIN: Light WEIGHT cement content for compressive STRENGTH 2500 psi is 400-510 pounds PER cubic yard and 440-560 for compressive strength 3000 psi.

Discussion

83.	Most low-density aggregates are ________ in origin.(a) Volcanic(b) Sea water(c) Highly dense area(d) Low dense areaThe question was asked at a job interview.My question is based upon Light Weight Concrete in section Special Concrete and Concreting Methods of Concrete Technology
Answer» Right answer is (a) Volcanic The EXPLANATION is: Most low-density AGGREGATES are volcanic in ORIGIN and include pumice, tuff, scoria, and CINDERS.

Discussion

84.	Maximum nominal size of aggregates to be used in concrete may be as large as possible within the limits prescribed by _______(a) IS 456-2000(b) IS 456-2010(c) IS 513-1999(d) IS 465-2000I got this question in an online interview.Query is from Mix Design in portion Special Concrete and Concreting Methods of Concrete Technology
Answer» Correct answer is (a) IS 456-2000 Easy explanation: Option can be eliminated because there is no such CODE. MAXIMUM nominal SIZE of aggregates to be USED in concrete may be as large as possible within the limits prescribed by IS 456:2000.

Discussion

85.	Prepacked concrete _________ water proofing concrete.(a) Is(b) Is not(c) May be(d) Is but depends on temperatureThis question was posed to me in an online interview.The doubt is from Hot Weather Concreting, Prepacked and Vacuum Cement topic in portion Special Concrete and Concreting Methods of Concrete Technology
Answer» Right OPTION is (a) Is The explanation: Prepacked CONCRETE is water PROOFING concrete with QUALITY plaster which prevents water seepage.

Discussion

86.	The cement concrete, from which entrained air and excess water are removed after placing it in position, is called _________(a) Vacuum concrete(b) LWC(c) Prestressed concrete(d) Sawdust concreteI got this question in an international level competition.I need to ask this question from Light Weight Concrete in portion Special Concrete and Concreting Methods of Concrete Technology
Answer» The correct choice is (a) VACUUM CONCRETE Explanation: Vacuum concrete is the TYPE of concrete in which the excess water is removed for improving concrete strength. The water is removed by use of vacuum mats connected to a vacuum PUMP.

Discussion

87.	Which temperature avoids flammability?(a) 35(b) 120-150(c) 100(d) 60-150This question was posed to me in an interview for internship.This interesting question is from Concrete Cloth, Polymer Impregnated Concrete topic in section Special Concrete and Concreting Methods of Concrete Technology
Answer» Correct choice is (a) 35 The BEST EXPLANATION: 35 ^oC is the TEMPERATURE that helps to AVOID flammability and at that temperature cooling is DONE after the complete removal of moisture.

Discussion

88.	It is difficult to retain moisture for hydration for RAPID EVAPORATION OF WATER DURING CURING PERIOD.(a) True(b) FalseI have been asked this question in class test.This question is from Hot Weather Concreting, Prepacked and Vacuum Cement in chapter Special Concrete and Concreting Methods of Concrete Technology
Answer» Correct option is (a) True Easiest explanation: It is difficult to retain moisture for hydration and maintain REASONABLY uniform TEMPERATURE CONDITIONS during the CURING period.

Discussion

89.	At what temperature the heat is supplied to concrete to remove moisture in ^oC?(a) 35(b) 120-150(c) 100(d) 60-150The question was posed to me in an interview for job.The doubt is from Concrete Cloth, Polymer Impregnated Concrete topic in chapter Special Concrete and Concreting Methods of Concrete Technology
Answer» The CORRECT choice is (b) 120-150 Explanation: 120 ^oC to 150 ^oC is the TEMPERATURE required to give the heating to remove moisture in Polymer IMPREGNATED CONCRETE.

Discussion

90.	The compressive strength varies from____________(a) < 200 kg/cm^2(b) > 550 kg/cm^2(c) 200-550 kg/cm^2(d) 700 kg/cm^2The question was posed to me in examination.Question is from No Fines Concrete, High Density Concrete in portion Special Concrete and Concreting Methods of Concrete Technology
Answer» The CORRECT ANSWER is (c) 200-550 kg/cm^2 For EXPLANATION I would say: Compressive strengths varying from 200 -550 kg/sq cm can be produced using STEEL punchings as COARSE aggregate.

Discussion

91.	The range of the density for this concrete is ___________(a) >5000 kg/cu. m(b)
Answer» Correct ANSWER is (C) 3400-5600 kg/cu m Explanation: Test results indicate that high DENSITY concrete with DENSITIES ranging from 3400 -5600 kg/cu m.

Discussion

92.	Density of no fines concrete with light weight aggregate vary from _________ kg/m^3.(a) 1600-1900(b) 2500(d) >300The question was posed to me in an internship interview.Asked question is from No Fines Concrete, High Density Concrete in division Special Concrete and Concreting Methods of Concrete Technology
Answer» Right answer is (B) <300 The explanation is: The range of the density of no fines AGGREGATES with the LIGHT weight aggregates vary from less than 300 kg/m^3.

Discussion

93.	Aerated concrete is made in the density of approx. _________ kg/m^3.(a) 50(b) 150(c) 250(d) 350I have been asked this question in an interview.My question is from Mix Design of LWC, Aerated Concrete topic in section Special Concrete and Concreting Methods of Concrete Technology
Answer» Right ANSWER is (d) 350 The best I can explain: AERATED concrete is MADE in the density RANGE from 300 kg/m^3 to about 800 kg/m^3.

Discussion

94.	Entrainment of air while applying cement, increases resistance to frost action.(a) True(b) FalseI had been asked this question in an internship interview.My question is based upon Mix Design of LWC, Aerated Concrete topic in portion Special Concrete and Concreting Methods of Concrete Technology
Answer» Correct choice is (a) True The EXPLANATION: It is found that entrainment of air or gas bubbles while applying cement, increases RESISTANCE to FROST ACTION.

Discussion

95.	Aerated Concrete is _________(a) Very heavy weight(b) Heavy weight(c) Medium weight(d) Light weightThe question was asked in class test.This is a very interesting question from Mix Design of LWC, Aerated Concrete topic in division Special Concrete and Concreting Methods of Concrete Technology
Answer» Correct CHOICE is (d) LIGHT weight The best explanation: Aerated concrete is also referred to as GAS concrete, foam concrete, cellular concrete. In India we have at PRESENT a few factories manufacturing aerated concrete.

Discussion

96.	Light weight cement content for compressive strength 34.47MPa is _______ kg/m^3.(a) 237-303(b) 261-332(c) 314-392(d) 373-445I have been asked this question during an interview.My enquiry is from Structural Light Weight Concrete topic in chapter Special Concrete and Concreting Methods of Concrete Technology
Answer» CORRECT choice is (d) 373-445 Best EXPLANATION: LIGHT weight CEMENT content for compressive STRENGTH 34.47 MPa is 373-445 kg/m^3. 314-392 is the compressive strength of 27.58 MPa.

Discussion

97.	The sound absorption coefficient of light weight concrete is nearly __________(a) Twice(b) Thrice(c) Four times(d) Six timesThis question was posed to me in unit test.My doubt stems from Light Weight Concrete in division Special Concrete and Concreting Methods of Concrete Technology
Answer» The correct CHOICE is (a) Twice Explanation: The SOUND absorption coefficient of light weight concrete is nearly twice. Lightweight aggregates used in structural lightweight concrete are typically expanded CLAY materials that have been HEATED in a ROTARY kiln to develop a porous structure.

Discussion

98.	________ has designated the concrete mixes into a number of grades as M10, M15.(a) IS 456-2000(b) IS 456-2010(c) IS 513-1999(d) IS 465-2000I had been asked this question in examination.My question comes from Mix Design in portion Special Concrete and Concreting Methods of Concrete Technology
Answer» Correct option is (a) IS 456-2000 Easiest explanation: IS 456-2000 has designated the concrete MIXES into a number of GRADES as M10, M15, M20, M25, M30, M35 and M40.

Discussion

99.	Large temperature differentials within the concrete member may promote __________(a) Elastic shrinkage(b) Cracking(c) High workability(d) Good strengthI had been asked this question during an internship interview.I would like to ask this question from Factors Affecting PIC, Cold Weather Concreting topic in division Special Concrete and Concreting Methods of Concrete Technology
Answer» Correct choice is (B) Cracking For explanation: Large TEMPERATURE DIFFERENTIALS within the concrete member may promote cracking and affect its durability adversely.

Discussion

100.	IS: 7861 part-2 deals with __________(a) Hot weathering concrete(b) Cold weathering concrete(c) Air entertained concrete(d) OPCThe question was asked in my homework.My question comes from Factors Affecting PIC, Cold Weather Concreting in division Special Concrete and Concreting Methods of Concrete Technology
Answer» Correct OPTION is (b) Cold WEATHERING concrete Easiest explanation: IS: 7861 part-1 DEALS with HOT weather concreting and Part-2 deals with cold weather concreting.

Discussion

Explore topic-wise InterviewSolutions in .

The __________ compressive strength required from structural consideration.(a) Nominal(b) Minimum(c) Maximum(d) NoI had been asked this question in an interview for job.The question is from Mix Design in section Special Concrete and Concreting Methods of Concrete Technology

The addition of glass fibers are in the range of __________(a) 0-6%(b) 10%(c) 15-20%(d) 20%-25%I got this question in my homework.I would like to ask this question from Factors Affecting PIC, Cold Weather Concreting topic in division Special Concrete and Concreting Methods of Concrete Technology

What is the 10 day bending young’s modulus in N/mm^2?(a) 40(b) 1500(c) 3.4(d) 180The question was asked in a national level competition.This interesting question is from Concrete Cloth, Polymer Impregnated Concrete in section Special Concrete and Concreting Methods of Concrete Technology

___________ mm thickness is not available in concrete cloth.(a) 5(b) 8(c) 13(d) 18The question was asked in semester exam.Origin of the question is Concrete Cloth, Polymer Impregnated Concrete in chapter Special Concrete and Concreting Methods of Concrete Technology

What is the 10 day compressive young’s modulus in N/mm^2?(a) 40(b) 1500(c) 3.4(d) 180The question was posed to me in class test.Question is from Concrete Cloth, Polymer Impregnated Concrete topic in portion Special Concrete and Concreting Methods of Concrete Technology

Aerated Concrete is ______________(a) Very heavy weight(b) Heavy weight(c) Medium weight(d) Light weightI had been asked this question in an interview for internship.This intriguing question comes from Special Concrete topic in division Special Concrete and Concreting Methods of Concrete Technology

Compressive strength of hardened concrete is done by _______(a) Cube test(b) Tensile splitting test(c) Concrete core test(d) Flexure testI got this question in final exam.My question is based upon Various Testing Methods in chapter Special Concrete and Concreting Methods of Concrete Technology

The density of concrete made with saturated aggregate is ___________(a) High(b) Low(c) Very high(d) Very lowThe question was asked in a national level competition.Asked question is from Mix Design of LWC, Aerated Concrete in division Special Concrete and Concreting Methods of Concrete Technology

Air contents should be _________ % by volume.(a) 1-2(b) 2-3(c) 3-4(d) 4-5The question was asked by my school teacher while I was bunking the class.My question is based upon Mix Design of LWC, Aerated Concrete topic in portion Special Concrete and Concreting Methods of Concrete Technology

Polypropylene fibers is hydrophobic in nature.(a) True(b) FalseThis question was posed to me in an interview for job.I'm obligated to ask this question of Sulphur Infiltrated Concrete, FRC topic in portion Special Concrete and Concreting Methods of Concrete Technology

In bridges, HDC is used.(a) True(b) FalseThe question was posed to me during an interview for a job.I'd like to ask this question from Special Concrete in division Special Concrete and Concreting Methods of Concrete Technology

Which one is not the polymeric resin?(a) Polyester resin(b) Epoxy resin(c) Vinyl ester resin(d) SulphatesThe question was asked in my homework.My query is from Factors Affecting PIC, Cold Weather Concreting in section Special Concrete and Concreting Methods of Concrete Technology

Glass fiber is made up from _______ individual filaments.(a) 100-200(b) 200-400(c) 500(d) >500I got this question in examination.Question is from Sulphur Infiltrated Concrete, FRC topic in portion Special Concrete and Concreting Methods of Concrete Technology

What is the value of modulus of elasticity?(a) 60-115 MPa(b) 10-16 MPa(c) 35-50 GPa(d) 500 GPaI had been asked this question in semester exam.This question is from Sulphur Infiltrated Concrete, FRC topic in section Special Concrete and Concreting Methods of Concrete Technology

Maximum size of aggregates are used to produce 100MPa compressive strength?(a) 20-30 mm(b) 10-20 mm(c) 30-40 mm(d) 40-50 mmI got this question during an interview.My doubt stems from No Fines Concrete, High Density Concrete in chapter Special Concrete and Concreting Methods of Concrete Technology

Most low-density aggregates are ________ in origin.(a) Volcanic(b) Sea water(c) Highly dense area(d) Low dense areaThe question was asked at a job interview.My question is based upon Light Weight Concrete in section Special Concrete and Concreting Methods of Concrete Technology

Which temperature avoids flammability?(a) 35(b) 120-150(c) 100(d) 60-150This question was posed to me in an interview for internship.This interesting question is from Concrete Cloth, Polymer Impregnated Concrete topic in section Special Concrete and Concreting Methods of Concrete Technology

The compressive strength varies from____________(a) < 200 kg/cm^2(b) > 550 kg/cm^2(c) 200-550 kg/cm^2(d) 700 kg/cm^2The question was posed to me in examination.Question is from No Fines Concrete, High Density Concrete in portion Special Concrete and Concreting Methods of Concrete Technology

The range of the density for this concrete is ___________(a) >5000 kg/cu. m(b)

Aerated concrete is made in the density of approx. _________ kg/m^3.(a) 50(b) 150(c) 250(d) 350I have been asked this question in an interview.My question is from Mix Design of LWC, Aerated Concrete topic in section Special Concrete and Concreting Methods of Concrete Technology

Entrainment of air while applying cement, increases resistance to frost action.(a) True(b) FalseI had been asked this question in an internship interview.My question is based upon Mix Design of LWC, Aerated Concrete topic in portion Special Concrete and Concreting Methods of Concrete Technology

Aerated Concrete is _________(a) Very heavy weight(b) Heavy weight(c) Medium weight(d) Light weightThe question was asked in class test.This is a very interesting question from Mix Design of LWC, Aerated Concrete topic in division Special Concrete and Concreting Methods of Concrete Technology

The sound absorption coefficient of light weight concrete is nearly __________(a) Twice(b) Thrice(c) Four times(d) Six timesThis question was posed to me in unit test.My doubt stems from Light Weight Concrete in division Special Concrete and Concreting Methods of Concrete Technology

________ has designated the concrete mixes into a number of grades as M10, M15.(a) IS 456-2000(b) IS 456-2010(c) IS 513-1999(d) IS 465-2000I had been asked this question in examination.My question comes from Mix Design in portion Special Concrete and Concreting Methods of Concrete Technology