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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which test is used to determine the dimensions of any object?(a) Ultrasonic test(b) Torsion test(c) Eddy current test(d) Compression testI have been asked this question in class test.This interesting question is from Testing topic in section Concrete Mix Design of Concrete Technology |
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Answer» Correct answer is (C) Eddy current test |
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| 2. |
The loss in weight should not exceed ________ % when tested with Na2SO4 and ________ % with MgSO4 solution.(a) 12, 18(b) 18, 12(c) 10, 15(d) 15, 10This question was addressed to me in class test.Query is from Sampling in division Concrete Mix Design of Concrete Technology |
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Answer» The correct choice is (a) 12, 18 |
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| 3. |
IS code for Specification for coarse and fine aggregates from natural sources for concrete?(a) IS 269:1989(b) IS 383:197(c) IS 455:1989(d) IS 456:2000The question was posed to me during a job interview.The question is from Mix Design for Pumpable Concrete topic in chapter Concrete Mix Design of Concrete Technology |
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Answer» CORRECT choice is (B) IS 383:197 The explanation is: IS 383:1970 – Specification for coarse and FINE aggregates from NATURAL sources for concrete. |
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| 4. |
Maximum size of aggregates should not be larger than _______________(a) 1/3 the thickness of a slab(b) 1/2 the thickness of a slab(c) 1/1 the thickness of a slab(d) 1/4 the thickness of a slabI had been asked this question in an interview for job.This interesting question is from American Concrete Method of Mix Design topic in portion Concrete Mix Design of Concrete Technology |
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Answer» Right ANSWER is (a) 1/3 the thickness of a slab |
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| 5. |
__________ water-cement ratio content to give adequate durability for the particular site conditions.(a) Minimum(b) Nominal(c) .5(d) MaximumThis question was posed to me during an interview.Origin of the question is Concept of Concrete Mix Design topic in portion Concrete Mix Design of Concrete Technology |
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Answer» The correct choice is (d) Maximum |
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| 6. |
This cement content should ________ the cement content required based on durability criteria.(a) Be more than(b) Be equal to(c) Be less than(d) Not be less thanThe question was asked during an interview for a job.This intriguing question comes from American Concrete Method of Mix Design topic in section Concrete Mix Design of Concrete Technology |
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Answer» The CORRECT CHOICE is (d) Not be LESS than |
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| 7. |
The _________ compressive strength required from structural consideration.(a) Nominal(b) Minimum(c) Maximum(d) NoThis question was posed to me during an interview.My question is taken from Concept of Concrete Mix Design in portion Concrete Mix Design of Concrete Technology |
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Answer» RIGHT option is (b) MINIMUM To elaborate: Option d can be eliminated EASILY because we need atleast some compressive strength. The minimum compressive strength required from structural CONSIDERATION. |
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| 8. |
The indenter used in Brinell hardness test is a ________________(a) Ball(b) Cone(c) Cylinder(d) PyramidThis question was addressed to me during an online interview.I would like to ask this question from Testing topic in division Concrete Mix Design of Concrete Technology |
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Answer» The correct answer is (B) Cone |
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| 9. |
During compression test of cast iron, the failure occurs i.e. the crack appears along the _________(a) Diagonal(b) Surface parallel to load applied(c) Surface perpendicular to load applied(d) LateralI have been asked this question in an interview for job.My doubt is from Testing in portion Concrete Mix Design of Concrete Technology |
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Answer» Correct answer is (a) Diagonal |
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| 10. |
On cooling below 1250^oC, C3S decomposes ____________(a) Fast(b) Slowly(c) Never(d) Depends on the conditionsI have been asked this question in final exam.The doubt is from Sampling in portion Concrete Mix Design of Concrete Technology |
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Answer» Right answer is (b) Slowly |
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| 11. |
Determine the _______ either from strength considerations or from durability considerations.(a) Slump value(b) The maximum size of aggregate(c) The amount of mixing water(d) The minimum water-cement ratioI got this question in an online interview.My question is taken from American Concrete Method of Mix Design in chapter Concrete Mix Design of Concrete Technology |
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Answer» CORRECT OPTION is (d) The MINIMUM water-cement RATIO For explanation: Determine the minimum water-cement ratio either from strength considerations or from durability considerations. |
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| 12. |
IS code for Specification for ordinary Portland cement, 33 grade?(a) IS 269:1989(b) IS 383:197(c) IS 455:1989(d) IS 456:2000The question was posed to me in final exam.My enquiry is from Mix Design for Pumpable Concrete topic in division Concrete Mix Design of Concrete Technology |
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Answer» Correct option is (a) IS 269:1989 |
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| 13. |
According to IRC:15-2011, Minimum cement content for 4.5 N/mm^2 characteristic flexural strength for OPC + fly ash mix OPC shall ____________(a) Shall not be less than 360 kg/m^3(b) Shall not be less than 425 kg/m^3(c) Shall not be less than 340 kg/m^3(d) Shall not be less than 500 kg/m^3The question was posed to me by my college professor while I was bunking the class.My question is from Road Method of Mix Design in portion Concrete Mix Design of Concrete Technology |
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Answer» RIGHT answer is (C) Shall not be LESS than 340 kg/m^3 The best explanation: According to IRC:15-2011, Minimum CEMENT content for 4.5 N/mm^2 characteristic flexural strength for OPC + fly ash mix OPC shall not be less than 340 kg/m^3 and for opc itshouldn’t be less than 360 kg/m^3. |
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| 14. |
Maximum size of aggregates should not be larger than ___________(a) 1/5 the minimum dimension of structural members(b) 1/4 the minimum dimension of structural members(c) 1/3 the minimum dimension of structural members(d) 1/6 the minimum dimension of structural membersI had been asked this question in semester exam.Question is taken from American Concrete Method of Mix Design topic in chapter Concrete Mix Design of Concrete Technology |
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Answer» The correct CHOICE is (a) 1/5 the minimum dimension of structural MEMBERS |
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| 15. |
In universal testing machine, for a circular section specimen, the gauge length is taken to be _____________(a) 3.65 √A(b) 4.65 √A(c) 5.65 √A(d) 6.65 √A where A is the area of cross section of the specimenThis question was posed to me in unit test.The question is from Testing topic in portion Concrete Mix Design of Concrete Technology |
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Answer» Right OPTION is (C) 5.65 √A |
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| 16. |
IS 1199:1959 is for ____________(a) Specification for standard sand for testing of cement(b) Methods of sampling and analysis of concrete(c) Specification for Portland-pozzolana cement: Part 2 Calcined clay based(d) Methods of test for pozzolanic materialsThe question was asked in an interview for internship.My question is from Mix Design for Pumpable Concrete in portion Concrete Mix Design of Concrete Technology |
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Answer» RIGHT choice is (a) Specification for standard sand for testing of cement Easy EXPLANATION: IS 1199:1959 METHODS of sampling and analysis of CONCRETE to the need of CIVIL engineering. |
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| 17. |
According to IRC:15-2011, Minimum cement content for 4.5 N/mm^2 characteristic flexural strength for PPCshall _________(a) Shall not be less than 360 kg/m^3(b) Shall not be less than 425 kg/m^3(c) Shall not be less than 340 kg/m^3(d) Shall not be less than 500 kg/m^3I got this question in a job interview.My question is based upon Road Method of Mix Design topic in section Concrete Mix Design of Concrete Technology |
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Answer» Correct OPTION is (b) Shall not be LESS than 425 kg/m^3 |
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| 18. |
The lower the w/c ratio ___________ the strength of concrete.(a) Higher(b) Lower(c) Poor(d) ModerateI have been asked this question during an online interview.This intriguing question originated from American Concrete Method of Mix Design topic in portion Concrete Mix Design of Concrete Technology |
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Answer» Right choice is (a) HIGHER |
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| 19. |
For the given slump and maximum size of coarse aggregate determine the ______________(a) Slump value(b) The maximum size of aggregate(c) The amount of mixing water(d) The minimum water-cement ratioThe question was asked in exam.My question is based upon American Concrete Method of Mix Design in division Concrete Mix Design of Concrete Technology |
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Answer» The CORRECT option is (c) The amount of mixing water |
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| 20. |
Depending on the degree of workability and placing condition determine the ___________(a) Slump value(b) The maximum size of aggregate(c) The amount of mixing water(d) The minimum water-cement ratioI had been asked this question during an interview.My question is based upon American Concrete Method of Mix Design in portion Concrete Mix Design of Concrete Technology |
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Answer» Right option is (a) Slump value |
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| 21. |
The adequate workability necessary for _________ compaction with the compacting equipment available.(a) Half(b) Quarter(c) Full(d) DoubleThe question was asked in a national level competition.Question is taken from Concept of Concrete Mix Design in chapter Concrete Mix Design of Concrete Technology |
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Answer» Correct OPTION is (c) FULL |
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| 22. |
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 465-2000This question was addressed to me in examination.This is a very interesting question from Concept of Concrete Mix Design topic in section Concrete Mix Design of Concrete Technology |
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Answer» Right option is (a) IS 456-2000 |
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| 23. |
What is the approx. mix proportion for M20?(a) 1:3:6(b) 1:2:4(c) 1:1.5:3(d) 1:1:2This question was posed to me in a job interview.The question is from Concept of Concrete Mix Design in portion Concrete Mix Design of Concrete Technology |
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Answer» The CORRECT answer is (c) 1:1.5:3 |
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| 24. |
In charpy test specimen, the angle of v-notch section is ___________(a) 30 degrees(b) 45 degrees(c) 60 degrees(d) 90 degreesI got this question in a job interview.I'm obligated to ask this question of Testing in division Concrete Mix Design of Concrete Technology |
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Answer» Correct OPTION is (b) 45 degrees |
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| 25. |
According to IRC:15-2011, maximum free W/C ratio for PPC is _________(a) .45(b) .4(c) .5(d) .55The question was asked during a job interview.Query is from Road Method of Mix Design topic in section Concrete Mix Design of Concrete Technology |
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Answer» RIGHT answer is (c) .5 For explanation: According to IRC:15-2011, maximum FREE water CEMENT ratio for PPC is .5 and for opc it’s .45. |
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| 26. |
According to IRC:15-2011, maximum free W/C ratio for OPC is ________________(a) .45(b) .4(c) .5(d) .55I have been asked this question in an online interview.Enquiry is from Road Method of Mix Design in division Concrete Mix Design of Concrete Technology |
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Answer» Right answer is (a) .45 |
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| 27. |
The mineral oil if present in mixing for concrete ______________(a) Improves strength(b) Reduces strength(c) Gives more slump(d) Gives a smooth surfaceThis question was addressed to me at a job interview.My question comes from Sampling in chapter Concrete Mix Design of Concrete Technology |
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Answer» RIGHT option is (a) Improves strength The BEST I can explain: The mineral oil is present in MIXING for concrete INCREASES strength for the concentration up to 2%. |
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| 28. |
According to IRC:15-2011, Maximum nominal size of aggregates is ________(a) 20 mm crushed aggregates(b) 31.5 mm crushed aggregates(c) 25 mm crushed aggregates(d) 30.5 mm crushed aggregatesI had been asked this question in my homework.The above asked question is from Road Method of Mix Design in section Concrete Mix Design of Concrete Technology |
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Answer» CORRECT ANSWER is (B) 31.5 mm crushed aggregates To explain I would say: According to IRC:15-2011, the MAXIMUM nominal size of aggregates is 31.5 mm crushed aggregates and 20mm was according to 2002. |
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| 29. |
According to IRC:15-2011 _______% Fly ash is required to be replaced with the total cementitious materials.(a) 15(b) 20(c) 25(d) 30I had been asked this question in an international level competition.My question comes from Road Method of Mix Design in section Concrete Mix Design of Concrete Technology |
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Answer» The CORRECT answer is (B) 20 |
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| 30. |
_________ cement content to avoid shrinkage cracking due to temperature cycle in mass concrete.(a) Minimum(b) Nominal(c) .5(d) MaximumI got this question during an internship interview.The query is from Concept of Concrete Mix Design in portion Concrete Mix Design of Concrete Technology |
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Answer» CORRECT answer is (d) Maximum The explanation is: Maximum cement content to avoid SHRINKAGE cracking DUE to the temperature cycle in mass concrete. It gives adequate durability for the particular site condition. |
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| 31. |
To neutralize 200 ml of sample should not require more than 10 ml of __________ normal HCI using methyl orange.(a) 1(b) .1(c) 10(d) .01The question was asked in an interview for job.My question comes from Sampling topic in section Concrete Mix Design of Concrete Technology |
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Answer» RIGHT choice is (b) .1 Best explanation: To neutralize 200 ml of water sample the value of 0.1 NORMAL HCI using methyl ORANGE as an indicator should not require more than 10 ml. |
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| 32. |
IS Code of practice for plain and reinforced concrete is ________(a) IS 269:1989(b) IS 383:197(c) IS 455:1989(d) IS 456:2000The question was asked in examination.I would like to ask this question from Mix Design for Pumpable Concrete in section Concrete Mix Design of Concrete Technology |
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Answer» Correct choice is (d) IS 456:2000 |
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| 33. |
According to IRC:15-2002 _______% Fly ash is required to be replaced with the total cementitious materials.(a) 15(b) 20(c) 25(d) 30I had been asked this question during an internship interview.Asked question is from Road Method of Mix Design in division Concrete Mix Design of Concrete Technology |
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Answer» Correct answer is (c) 25 |
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| 34. |
According to IRC:15-2011, Characteristic Flexural Strength at 28 days is ____________(a) 4 N/mm^2(b) 4.5 N/mm^2(c) 5 N/mm^2(d) 3.5 N/mm^2I got this question in an international level competition.My question is taken from Road Method of Mix Design in division Concrete Mix Design of Concrete Technology |
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Answer» Right answer is (B) 4.5 N/mm^2 |
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| 35. |
IS 457:1957 is for ____________(a) Code of practice for general construction of plain and reinforced concrete for dams and other massive structures(b) Specification for Portland pozzolana cement flyash based(c) Specification for Portland pozzolana cement calcined clay based(d) Methods of test for pozzolanic materialsThis question was posed to me in an interview for job.My question is taken from Mix Design for Pumpable Concrete topic in portion Concrete Mix Design of Concrete Technology |
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Answer» CORRECT answer is (a) Code of practice for general CONSTRUCTION of plain and REINFORCED CONCRETE for dams and other massive structures Explanation: IS 457:1957 Code of practice for general construction of plain and reinforced concrete for dams and other massive structures. |
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| 36. |
Determine the amount of cement per unit volume of concrete from ______________(a) Slump value(b) The maximum size of aggregate(c) The amount of mixing water(d) The maximum size of aggregate and the amount of mixing waterI got this question in an interview.Enquiry is from American Concrete Method of Mix Design in chapter Concrete Mix Design of Concrete Technology |
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Answer» Right choice is (d) The maximum size of AGGREGATE and the amount of MIXING water |
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| 37. |
What is the approx. mix proportion for M10?(a) 1:3:6(b) 1:2:4(c) 1:1.5:3(d) 1:1:2This question was posed to me during an interview.This intriguing question comes from Concept of Concrete Mix Design topic in chapter Concrete Mix Design of Concrete Technology |
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Answer» The CORRECT answer is (a) 1:3:6 |
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| 38. |
In which type of test the capillary action principle is used?(a) Probe test(b) Bend liquid test(c) Dye penetrant test(d) Torsion testThe question was asked in an online interview.This key question is from Testing topic in portion Concrete Mix Design of Concrete Technology |
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Answer» Correct choice is (c) Dye penetrant test |
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| 39. |
When sand is fully dry then it’s volume is _________(a) Equal(b) Less(c) More(d) Can’t sayThe question was asked during an internship interview.Question is taken from Sampling topic in portion Concrete Mix Design of Concrete Technology |
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Answer» RIGHT CHOICE is (a) Equal For EXPLANATION: When the sand is fully dry then there is 0 bulking in it. THEREFORE, the VOLUME of sand will be same. |
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| 40. |
Loss on Ignition (L.O.I.) is the loss in weight of cement after being heated to ____________(a) 1000°C(b) 100°C(c) 500°C(d) 1500°CThis question was posed to me by my college professor while I was bunking the class.This is a very interesting question from Sampling in chapter Concrete Mix Design of Concrete Technology |
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Answer» Correct option is (a) 1000°C |
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| 41. |
IS 1727:1967 is for __________________(a) Code of practice for general construction of plain and reinforced concrete for dams and other massive structures(b) Specification for Portland pozzolana cement Part 1 Fly ash based(c) Specification for Portland-pozzolana cement: Part 2 Calcined clay based(d) Methods of test for pozzolanic materialsThe question was posed to me in quiz.This key question is from Mix Design for Pumpable Concrete topic in chapter Concrete Mix Design of Concrete Technology |
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Answer» The correct answer is (d) Methods of test for POZZOLANIC MATERIALS |
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| 42. |
According to IRC:15-2002, Maximum nominal size of aggregates is ________(a) 20 mm crushed aggregates(b) 31.5 mm crushed aggregates(c) 25 mm crushed aggregates(d) 30.5 mm crushed aggregatesThis question was addressed to me in my homework.I would like to ask this question from Road Method of Mix Design topic in chapter Concrete Mix Design of Concrete Technology |
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Answer» Correct option is (a) 20 mm CRUSHED aggregates |
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| 43. |
IS 1489(Part 1):1991 is for ____________(a) Code of practice for general construction of plain and reinforced concrete for dams and other massive structures(b) Specification for Portland pozzolana cement Part 1 Flyash based(c) Specification for Portland-pozzolana cement: Part 2 Calcined clay based(d) Methods of test for pozzolanic materialsThe question was posed to me in quiz.The question is from Mix Design for Pumpable Concrete in section Concrete Mix Design of Concrete Technology |
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Answer» The correct OPTION is (B) SPECIFICATION for Portland pozzolana cement Part 1 Flyash BASED |
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| 44. |
What is the approx. mix proportion for M15?(a) 1:3:6(b) 1:2:4(c) 1:1.5:3(d) 1:1:2I got this question in examination.I'd like to ask this question from Concept of Concrete Mix Design in chapter Concrete Mix Design of Concrete Technology |
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Answer» Right choice is (b) 1:2:4 |
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| 45. |
The aim of the designer should always be to get concrete mixtures of optimum strength at _________ cement content and ________ workability.(a) Maximum, Nonacceptable(b) Minimum, Nonacceptable(c) Maximum, acceptable(d) Minimum, acceptableI got this question in an international level competition.I would like to ask this question from American Concrete Method of Mix Design in portion Concrete Mix Design of Concrete Technology |
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Answer» The CORRECT choice is (d) Minimum, acceptable |
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| 46. |
During radiography test, which region absorbs less radiation and transmits more?(a) Low and high density regions absorb and transmit same amount of radiation(b) High density region(c) Low density region(d) Low and high density regions adsorbI had been asked this question at a job interview.Query is from Testing topic in division Concrete Mix Design of Concrete Technology |
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Answer» Correct choice is (C) Low DENSITY region |
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| 47. |
IS 650:1991 is for ____________(a) Specification for standard sand for testing of cement(b) Methods of sampling and analysis of concrete(c) Specification for pozzolana cement(d) Methods of test for pozzolanic materialsThis question was posed to me in semester exam.I would like to ask this question from Mix Design for Pumpable Concrete topic in section Concrete Mix Design of Concrete Technology |
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Answer» RIGHT choice is (a) Specification for STANDARD sand for testing of CEMENT Explanation: IS 650:1991 Specification for standard sand for testing of cement to the need of CIVIL engineering. |
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| 48. |
If the moisture content of 5 to 10% by weight, then the bulking of sand is increased by __________(a) 20(b) 30(c) 40(d) 50The question was posed to me during an online interview.The origin of the question is Sampling in chapter Concrete Mix Design of Concrete Technology |
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Answer» RIGHT choice is (d) 50 For explanation I WOULD say: With the moisture CONTENT of 5 to 10% by weight, the bulking of sand is increased by 50. |
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| 49. |
IS 1489(Part 2):1991 is for ____________(a) Code of practice for general construction of plain and reinforced concrete for dams and other massive structures(b) Specification for Portland pozzolana cement Part 1 Flyash based(c) Specification for Portland-pozzolana cement: Part 2 Calcined clay based(d) Methods of test for pozzolanic materialsI got this question in quiz.This is a very interesting question from Mix Design for Pumpable Concrete in section Concrete Mix Design of Concrete Technology |
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Answer» Right choice is (C) Specification for Portland-pozzolana cement: PART 2 Calcined CLAY BASED |
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| 50. |
IS code for Specification for Portland slag cement?(a) IS 269:1989(b) IS 383:197(c) IS 455:1989(d) IS 456:2000This question was posed to me in an interview for job.My doubt is from Mix Design for Pumpable Concrete topic in section Concrete Mix Design of Concrete Technology |
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Answer» CORRECT answer is (C) IS 455:1989 To explain: IS 455:1989 is for specification for PORTLAND SLAG CEMENT to the need of civil engineering. |
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