74 + Interview Questions in Aggregates And Testing Of Aggregates in Concrete Technology Page 1 InterviewSolution

1.	A value less than 10 signifies an exceptionally _________ while above 35 would normally be regarded as _________(a) Strong aggregates, weak aggregates(b) Weak aggregates, strong aggregates(c) Strong aggregates, strong aggregates(d) Weak aggregates, weak aggregatesThe question was posed to me in final exam.My query is from Testing of Aggregates topic in chapter Aggregates and Testing of Aggregates of Concrete Technology
Answer» The correct CHOICE is (a) Strong aggregates, WEAK aggregates Explanation: A value LESS than 10 signifies an exceptionally strong aggregate while above 35 would normally be regarded as weak aggregates.

Discussion

2.	From the graph below, what is C?(a) Unloading(b) Loading(c) Permanent strain unrecovered(d) Resilient strain recoveredThis question was addressed to me in final exam.My doubt stems from Mechanical Properties of Aggregates topic in portion Aggregates and Testing of Aggregates of Concrete Technology
Answer» Right CHOICE is (c) Permanent strain unrecovered The best I can EXPLAIN: According to HIGHWAY Construction and MAINTENANCE, they prepared a graph of aggregates for stress vs strain in which they came to a CONCLUSION C is Permanent strain unrecovered.

Discussion

3.	In crushing test, dry aggregates passing through ________ mm sieve and retained ________ mm in a cylinder.(a) 12.5, 10(b) 11.5, 10(c) 12.5, 11.5(d) 10, 2.36This question was addressed to me in my homework.The above asked question is from Testing of Aggregates in section Aggregates and Testing of Aggregates of Concrete Technology
Answer» Right choice is (a) 12.5, 10 The best I can EXPLAIN: DRY aggregates passing through 12.5 mm sieves and retained 10 mm sieves are filled in a cylindrical MEASURE of 11.5 mm DIAMETER and 18 cm height in three layers.

Discussion

4.	What is soundness?(a) Soundness of cement is the property by virtue of which the cement does not undergo any appreciable expansion(b) Soundness of cement is the property by virtue of which the cement does undergo any appreciable expansion(c) Soundness of cement is the property by virtue of which the cement does not undergo any appreciable contraction(d) Soundness of cement is the property by virtue of which the cement does undergo any appreciable contractionThe question was posed to me during an interview.This question is from Soundness of Aggregates in division Aggregates and Testing of Aggregates of Concrete Technology
Answer» The correct OPTION is (a) SOUNDNESS of cement is the property by virtue of which the cement does not undergo any appreciable expansion Easy EXPLANATION: Soundness of cement is the property by virtue of which the cement does not undergo any appreciable expansion.

Discussion

5.	What is the size of fine aggregates?(a) 4.75mm(b) < 4.75mm(c) > 4.75mm(d) 12mmThe question was asked in an international level competition.Origin of the question is Classification of Aggregates topic in section Aggregates and Testing of Aggregates of Concrete Technology
Answer» RIGHT choice is (b) < 4.75mm Best explanation: The SIZE of the FINE aggregates is LESS than 4.75mm because it PASSES from 4.75 mm sieve at its lowest so there is no chance for more than 4.75mm in its size.

Discussion

6.	The loss in weight should not exceed _________ percent when tested with sodium sulphate and _________ percent with magnesium sulphate solution.(a) 12, 18(b) 18, 12(c) 10, 15(d) 15, 10This question was posed to me by my college director while I was bunking the class.Enquiry is from Mechanical Properties of Aggregates in division Aggregates and Testing of Aggregates of Concrete Technology
Answer» Right choice is (a) 12, 18 For explanation: The LOSS in WEIGHT should not EXCEED 12 percent when tested with sodium sulphate and 18 percent with magnesium sulphate solution.

Discussion

7.	What is B in the following figure?(a) Unloading(b) Loading(c) Permanent strain unrecovered(d) Resilient strain recoveredI got this question by my school principal while I was bunking the class.I'd like to ask this question from Mechanical Properties of Aggregates topic in portion Aggregates and Testing of Aggregates of Concrete Technology
Answer» Right answer is (a) UNLOADING To explain: According to Highway Construction and MAINTENANCE, they PREPARED a GRAPH of aggregates for stress vs strain in which stress is DECREASING wrt strain after a period of time i.e. unloading.

Discussion

8.	What is the range of water absorption of aggregates used in road?(a) 2.5-2.9(b) .1-2(c) .1-2.5(d) 2-2.9The question was asked in an online interview.I want to ask this question from Testing of Aggregates topic in section Aggregates and Testing of Aggregates of Concrete Technology
Answer» Correct CHOICE is (b) .1-2 Easy explanation: The specific gravity of AGGREGATES normally used in road RANGES from about 2.5 to 2.9. Water absorption values range from 0.1 to about 2.0 PERCENT for aggregates normally used in road surfacing.

Discussion

9.	What is A in the following figure?(a) Unloading(b) Loading(c) Permanent strain unrecovered(d) Resilient strain recoveredThe question was asked by my school teacher while I was bunking the class.This question is from Mechanical Properties of Aggregates in division Aggregates and Testing of Aggregates of Concrete Technology
Answer» CORRECT OPTION is (b) Loading The best explanation: According to Highway CONSTRUCTION and MAINTENANCE, they prepared a graph of aggregates for stress vs strain in which stress is increasing wrt strain at first i.e. loading.

Discussion

10.	If the coefficient of thermal expansion of coarse aggregates and cement paste differs too much, then what happen?(a) A small change in temperature may introduce(b) No change(c) A large change in temperature may introduce(d) A small change in pressure may introduceI have been asked this question in homework.I want to ask this question from Thermal Properties topic in portion Aggregates and Testing of Aggregates of Concrete Technology
Answer» The correct CHOICE is (c) A large change in temperature may INTRODUCE Easiest EXPLANATION: If it happens then a large change in temperature may introduce differential MOVEMENT which may break the BOND between the aggregates and the paste.

Discussion

11.	What is the size of caliper?(a) 30cm(b) 50cm(c) 30mm(d) 40mmThis question was addressed to me during an interview.Question is taken from Soundness of Aggregates in portion Aggregates and Testing of Aggregates of Concrete Technology
Answer» Correct answer is (a) 30CM The explanation: Generally the SIZE of the caliper is 30cm with the LEAST count of .5mm with the 100ml of measuring cylinder.

Discussion

12.	Pick up the most appropriate statement from the following.(a) Sp. Gr. = c/a-b(b) Sp. Gr. = c/(a-b)(c) Sp. Gr. = a-b/c(d) Sp. Gr. = (a-b)/cThe question was posed to me during an online interview.My question is taken from Strength of Aggregates in chapter Aggregates and Testing of Aggregates of Concrete Technology
Answer» Right option is (b) Sp. Gr. = c/(a-b) The BEST explanation: Specific gravity is the ratio of the DENSITY of a substance to the density of a reference substance; EQUIVALENTLY, it is the ratio of the MASS of a substance to the mass of a reference substance for the same GIVEN volume.

Discussion

13.	The average specific gravity of natural aggregate is?(a) 2.7(b) 3(c) 1.5(d) 1I got this question in examination.This question is from Strength of Aggregates in section Aggregates and Testing of Aggregates of Concrete Technology
Answer» Right answer is (a) 2.7 The explanation is: The AVERAGE specific GRAVITY of majority of NATURAL aggregates LIES between 2.6 and 2.8.

Discussion

14.	The unit weight of heavy weight concrete varies from __________ kg/m^3.(a) 1000(b) 2400(c) 2000(d) 1400This question was posed to me in a job interview.The query is from Strength of Aggregates in section Aggregates and Testing of Aggregates of Concrete Technology
Answer» Correct choice is (b) 2400 The best I can explain: The unit weight of HEAVY weight concrete varies from 2400 kg/m^3 with sp.gr range from 4.0 to 4.6. (EG: mineral ORE sand barite).

Discussion

15.	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/cm^2(b) Between 350 to 600 kg/cm^2(c) Between 150 to 400 kg/cm^2(d) Less than 200 kg/cm^2This question was posed to me during an interview.This intriguing question originated from Strength of Aggregates topic in portion Aggregates and Testing of Aggregates of Concrete Technology
Answer» The correct OPTION is (d) Less than 200 kg/cm^2 Easiest explanation: The 28 days cube strength of MASS CONCRETE using aggregates of MAXIMUM size 5 cm for gravity dams should be less than 200 kg/cm^2.

Discussion

16.	If the coefficient of the two materials differ by more than 5.4 * 10^-6 per ^oC, then?(a) Workability of concrete may freeze(b) Durability of concrete subjected to freezing(c) Durability of concrete subjected to boiling(d) Workability of concrete subjected to boilingThe question was asked in a job interview.My doubt is from Thermal Properties in chapter Aggregates and Testing of Aggregates of Concrete Technology
Answer» The correct choice is (B) Durability of concrete subjected to freezing The best I can explain: If the COEFFICIENT of the two materials DIFFER by more than 5.4 * 10^-6 per ^oC, then the Durability of concrete subjected to freezing and thawing MAY be affected.

Discussion

17.	The ratio of the mass of the aggregate dried in an oven at ___________ for 24 hours to the mass of the water occupying a volume equal to that of solid.(a) 100-110^oC(b) 150-180^oC(c) 100^oC(d) 1500^oCThe question was asked in an interview for job.This interesting question is from Strength of Aggregates in portion Aggregates and Testing of Aggregates of Concrete Technology
Answer» Correct OPTION is (a) 100-110^oC Explanation: First SIEVE the sample aggregate, aggregate passing 12.5mm sieve and retaining 10mm sieve is OVEN DRIES at 100-110^oC for 3-4 hrs.

Discussion

18.	Le Chatelier apparatus consist of ___________(a) Brass mould(b) Steel mould(c) Aluminum mould(d) Wooden mouldI have been asked this question in quiz.This interesting question is from Soundness of Aggregates topic in section Aggregates and Testing of Aggregates of Concrete Technology
Answer» RIGHT answer is (a) Brass mould Best EXPLANATION: Le Chatelier apparatus CONSIST of brass mould with the DIAMETER of 30mm and height of 30 MM.

Discussion

19.	For the construction of cement concrete floor, the maximum permissible size of aggregate is ________(a) 4.75mm(b) 8mm(c) 10mm(d) 15mmI got this question in class test.My question is based upon Source of Aggregates in division Aggregates and Testing of Aggregates of Concrete Technology
Answer» The correct answer is (C) 10mm Easiest explanation: 40 MM for massive works like dams, retaining walls, ETC. 20 mm for Reinforced member. 10 mm for floors.

Discussion

20.	Natural aggregates come in which category?(a) Based on size(b) Based on origin(c) Based on density(d) Based on shapeThis question was posed to me in my homework.My enquiry is from Source of Aggregates in portion Aggregates and Testing of Aggregates of Concrete Technology
Answer» The CORRECT ANSWER is (b) BASED on origin Explanation: The word NATURAL itself says that it COMES from nature which comes in origin. And there are 2 types of aggregates in based on origin i.e. natural and artificial aggregates.

Discussion

21.	Which type of aggregate is shown below?(a) Angular aggregate(b) Rounded aggregate(c) Flaky aggregate(d) Irregular or partially aggregateI got this question by my college professor while I was bunking the class.My enquiry is from Classification of Aggregates topic in division Aggregates and Testing of Aggregates of Concrete Technology
Answer» Correct choice is (b) ROUNDED aggregate To explain: FULLY water WORM or completely shaped by ATTRITION. These are generally found in river or sea SHORE.

Discussion

22.	What do you mean by bulking?(a) The volume increase of fine aggregate due to presence of moisture content in it(b) The moisture present in aggregate forms a film around each particle(c) Fine aggregate shows completely realistic volume(d) The state of setting someone or something apart from othersI have been asked this question in a job interview.This question is from Bulking of Aggregates in section Aggregates and Testing of Aggregates of Concrete Technology
Answer» Right option is (a) The volume INCREASE of fine aggregate due to PRESENCE of moisture content in it For explanation: The volume increase of fine aggregate due to presence of moisture content is known as BULKING. Fine sand bulks more as compared to coarse sand.

Discussion

23.	Generally angular aggregates are the example of natural aggregates.(a) True(b) FalseI had been asked this question in homework.My question is based upon Source of Aggregates topic in chapter Aggregates and Testing of Aggregates of Concrete Technology
Answer» CORRECT answer is (a) True For explanation I would say: Artificial AGGREGATES obtained by mechanically crushing rocks, BOULDERS, or cobbles. Normally angular in shape and have rough surface TEXTURE.

Discussion

24.	What is the total percentage of aggregates in concrete by volume?(a) 50-60%(b) 60-75%(c) 85%(d) 50%The question was posed to me in examination.Origin of the question is Classification of Aggregates topic in portion Aggregates and Testing of Aggregates of Concrete Technology
Answer» Correct option is (b) 60-75% To ELABORATE: AGGREGATES, which ACCOUNT for 60-75% of the total volume of CONCRETE, are divided into 2 CATEGORIES.

Discussion

25.	What is the percentage of bulk if fine aggregates manufactured by extremely fine sand?(a) 20(b) 30(c) 40(d) 50This question was addressed to me by my college professor while I was bunking the class.Query is from Bulking of Aggregates topic in chapter Aggregates and Testing of Aggregates of Concrete Technology
Answer» RIGHT answer is (c) 40 To explain I would SAY: EXTREMELY FINE sand particularly the manufactured fine aggregate bulks as MUCH as about 40%.

Discussion

26.	For majority of aggregates, the coefficientof thermal expansion lies between approximately ____________(a) 5.4 * 10^-6 and 12.6 * 10^-6 per ^oC(b) 10.8 * 10^-6 and 16.2 * 10^-6 per ^oC(c) 5.4 * 10^-6 and 10.8 * 10^-6 per ^oC(d) 10.8 * 10^-6 and 12.6 * 10^-6 per ^oCI got this question in semester exam.My doubt stems from Thermal Properties in section Aggregates and Testing of Aggregates of Concrete Technology
Answer» The CORRECT OPTION is (a) 5.4 * 10^-6 and 12.6 * 10^-6 per ^OC Explanation: The coefficientof thermal expansion lies between APPROXIMATELY 5.4 * 10^-6 and 12.6 * 10^-6 per ^oC.

Discussion

27.	According to geological origin, aggregates is/are classified into __________ types.(a) 1(b) 2(c) 3(d) 4I had been asked this question in a national level competition.My question comes from Classification of Aggregates in division Aggregates and Testing of Aggregates of Concrete Technology
Answer» Correct OPTION is (B) 2 For explanation I WOULD SAY: There are 2 types of aggregates based on geological origin. They are natural aggregates and artificial aggregates.

Discussion

28.	According to IS: 2386 part-IV, each layer is tamped ________ times in crushing test.(a) 20(b) 25(c) 30(d) 10The question was asked during an interview.Question is taken from Testing of Aggregates in section Aggregates and Testing of Aggregates of Concrete Technology
Answer» Right choice is (b) 25 The explanation is: Each LAYER is tamped 25 TIMES with at standard TAMPING ROD. The test sample is weighed and placed in the test cylinder in three layers each layer being tamped again.

Discussion

29.	How many principal thermal properties are there for aggregates?(a) 1(b) 2(c) 3(d) 4The question was posed to me during an interview.The above asked question is from Thermal Properties topic in chapter Aggregates and Testing of Aggregates of Concrete Technology
Answer» Correct OPTION is (C) 3 Explanation: There are 3 principal thermal properties for aggregates: coefficient of thermal expansion, SPECIFIC heat, thermal CONDUCTIVITY.

Discussion

30.	For hydrated Portland cement, the coefficient of thermal expansion lies between approximately ____________(a) 5.4 * 10^-6 and 12.6 * 10^-6 per ^oC(b) 10.8 * 10^-6 and 16.2 * 10^-6 per ^oC(c) 5.4 * 10^-6 and 10.8 * 10^-6 per ^oC(d) 10.8 * 10^-6 and 12.6 * 10^-6 per ^oCI had been asked this question during an interview.This interesting question is from Thermal Properties topic in division Aggregates and Testing of Aggregates of Concrete Technology
Answer» The correct choice is (b) 10.8 * 10^-6 and 16.2 * 10^-6 PER ^oC To explain I would say: The COEFFICIENT of thermal expansion for hydrated PORTLAND cement LIES between approximately 10.8 * 10^-6 and 16.2 * 10^-6 per ^oC.

Discussion

31.	Aggregate abrasion value is determined by__________(a) Aggregates crushing strength(b) Los Angeles abrasion test(c) Aggregates Impact value test(d) Ten percent fine testI have been asked this question during an online exam.The above asked question is from Strength of Aggregates topic in chapter Aggregates and Testing of Aggregates of Concrete Technology
Answer» Right option is (b) Los ANGELES ABRASION test For EXPLANATION: AGGREGATE abrasion VALUE is determined by Los Angeles abrasion test as described in IS: 2386.

Discussion

32.	What is the maximum size of split?(a) 1mm(b) .5mm(c) 10mm(d) 2mmThe question was asked in an internship interview.Origin of the question is Soundness of Aggregates topic in chapter Aggregates and Testing of Aggregates of Concrete Technology
Answer» RIGHT choice is (b) .5mm For EXPLANATION: There is a SPLIT in MOULD and it does not exceed 0.50 mm. On EITHER side of split, there are two indicators with pointed ends. The thickness of mould cylinder is 0.50 mm.

Discussion

33.	Which type of aggregate is shown below?(a) Angular aggregate(b) Rounded aggregate(c) Flaky aggregate(d) Irregular or partially aggregateI got this question in an online interview.This intriguing question originated from Classification of Aggregates in portion Aggregates and Testing of Aggregates of Concrete Technology
Answer» Correct OPTION is (c) Flaky aggregate Explanation: Material USUALLY ANGULAR of which the thickness is small relative to the WIDTH.

Discussion

34.	Which type of aggregate is shown below?(a) Angular aggregate(b) Rounded aggregate(c) Flaky aggregate(d) Irregular or partially aggregateI have been asked this question in examination.This intriguing question comes from Classification of Aggregates topic in chapter Aggregates and Testing of Aggregates of Concrete Technology
Answer» The correct option is (a) Angular aggregate To explain I WOULD SAY: POSSESSING well defined EDGES FORMED at the intersection of roughly planar faces.

Discussion

35.	When the cement paste is filled in mould and kept in water. Then what should be the temperature of water?(a) 24-35°C(b) 20°C(c) 30-40°C(d) 50°CThis question was addressed to me during an interview.My question is taken from Soundness of Aggregates topic in chapter Aggregates and Testing of Aggregates of Concrete Technology
Answer» The correct choice is (a) 24-35°C To explain I would SAY: A small WEIGHT is placed at TOP and the WHOLE assembly is submerged in water for 24 hours. The temperature of water should be between 24°C to 35°C.

Discussion

36.	An aggregate is said to be flaky if its least dimension is less than ___________(a) 1/5th of mean dimension(b) 2/5th of mean dimension(c) 3/5th of mean dimension(d) 4/5th of mean dimensionThe question was posed to me in a national level competition.My question is based upon Source of Aggregates in division Aggregates and Testing of Aggregates of Concrete Technology
Answer» Correct option is (c) 3/5th of mean dimension The explanation is: An AGGREGATE is said to be flaky if its LEAST dimension is LESS than 3/5th of mean dimension.

Discussion

37.	From the graph below, what is D?(a) Unloading(b) Loading(c) Permanent strain unrecovered(d) Resilient strain recoveredI got this question in a national level competition.Query is from Mechanical Properties of Aggregates in chapter Aggregates and Testing of Aggregates of Concrete Technology
Answer» CORRECT option is (d) RESILIENT strain recovered For EXPLANATION: According to Highway CONSTRUCTION and MAINTENANCE, they prepared a graph of aggregates for stress vs strain, where D is resilient strain recovered.

Discussion

38.	The loss in weight should not exceed ______________ percent when tested with sodium sulphate and ________ percent with magnesium sulphate solution.(a) 12, 18(b) 18, 12(c) 10, 15(d) 15, 10I have been asked this question in homework.My question is based upon Testing of Aggregates in division Aggregates and Testing of Aggregates of Concrete Technology
Answer» Correct answer is (a) 12, 18 The EXPLANATION is: The LOSS in weight should not EXCEED 12 percent when tested with sodium sulphate and 18 percent with MAGNESIUM sulphate SOLUTION.

Discussion

39.	Los Angeles machine consists of circular drum of internal diameter ________ mm and length ________ mm.(a) 700, 700(b) 520, 520(c) 520, 700(d) 700, 520I got this question by my college director while I was bunking the class.This key question is from Testing of Aggregates in division Aggregates and Testing of Aggregates of Concrete Technology
Answer» The CORRECT ANSWER is (d) 700, 520 The explanation: Los Angeles MACHINE consists of circular drum of internal diameter 700 mm and length 520 mm MOUNTED on horizontal axis ENABLING it to be rotated.

Discussion

40.	The linear thermal coefficient of expansion lies between approximately ____________(a) 5.4 * 10^-6 and 12.6 * 10^-6 per ^oC(b) 10.8 * 10^-6 and 16.2 * 10^-6 per ^oC(c) 5.8 * 10^-6 and 14 * 10^-6 per ^oC(d) 10.8 * 10^-6 and 12.6 * 10^-6 per ^oCI had been asked this question in exam.My question comes from Thermal Properties topic in section Aggregates and Testing of Aggregates of Concrete Technology
Answer» Correct option is (c) 5.8 * 10^-6 and 14 * 10^-6 per ^oC For explanation: The linear THERMAL coefficient of expansion lies between approximately 5.8 * 10^-6 and 14 * 10^-6 per ^oC DEPENDING upon the type of AGGREGATES.

Discussion

41.	Which apparatus we need to find soundness?(a) Le Chatelier(b) Vicat’s apparatus(c) CTM(d) Pat testThis question was posed to me at a job interview.I want to ask this question from Soundness of Aggregates topic in division Aggregates and Testing of Aggregates of Concrete Technology
Answer» Correct choice is (a) Le Chatelier Easiest explanation: This test is performed with the help of Le Chatelier apparatus as SHOWN in figure below. It consists of a brass mould of DIAMETER 30 mm and height 30 mm.

Discussion

42.	The light weight aggregates are obtained from(a) Sedimentary rocks(b) Metamorphic rocks(c) Igneous rocks(d) Volcanic sourceI had been asked this question in an internship interview.The query is from Source of Aggregates topic in section Aggregates and Testing of Aggregates of Concrete Technology
Answer» RIGHT OPTION is (d) Volcanic source The BEST I can EXPLAIN: For making light weight masonry BLOCKS (to improved their thermal and insulating properties and nailing characteristic).

Discussion

43.	Which apparatus we don’t need to calculate the bulking of fine aggregates?(a) Measuring cylinder(b) Weighing balance(c) Steel rule(d) Vicat’s mouldI had been asked this question in my homework.The query is from Bulking of Aggregates in chapter Aggregates and Testing of Aggregates of Concrete Technology
Answer» Correct answer is (d) Vicat’s mould To explain: Vicat’s mould don’t come in use to CALCULATE the BULKING percentage because it is used to FIND initial and FINAL setting TIME.

Discussion

44.	What is the size of coarse aggregates?(a) 4.75mm(b) < 4.75mm(c) > 4.75mm(d) 12mmThe question was asked in quiz.This is a very interesting question from Classification of Aggregates topic in chapter Aggregates and Testing of Aggregates of Concrete Technology
Answer» The CORRECT choice is (C) > 4.75mm Best explanation: The size of the FINE aggregates is less than 4.75mm because it PASSES from 4.75 mm sieve but the aggregates which don’t PASS through it are coarse aggregates.

Discussion

45.	Bulking ___________ with increase in moisture.(a) Increase(b) Decrease(c) First increase then decrease(d) First decrease then increaseThis question was addressed to me in an online interview.Enquiry is from Bulking of Aggregates topic in portion Aggregates and Testing of Aggregates of Concrete Technology
Answer» Right choice is (c) First INCREASE then decrease For explanation: Bulking increases with increase in MOISTURE CONTENT UPTO a CERTAIN limit and beyond that the further increase in moisture content results in decrease in volume.

Discussion

46.	Fine aggregate do not show any bulking when it is absolutely dry.(a) True(b) FalseThe question was asked in my homework.This intriguing question comes from Bulking of Aggregates topic in section Aggregates and Testing of Aggregates of Concrete Technology
Answer» The CORRECT answer is (a) True Explanation: Fine aggregate do not show any BULKING when it is ABSOLUTELY DRY or completely saturated.

Discussion

47.	A maximum value of _________ percent is allowed for WBM base course in Indian conditions.(a) 25(b) 35(c) 40(d) 50I had been asked this question during an interview.My question is based upon Testing of Aggregates in section Aggregates and Testing of Aggregates of Concrete Technology
Answer» The correct option is (C) 40 Easy EXPLANATION: The AGGREGATE crushing value provides a relative measure of a MAXIMUM value of 40%age is ALLOWED for WBM base course in Indian conditions.

Discussion

48.	The coefficient of thermal expansion affects the heat resistance.(a) False(b) TrueThis question was posed to me in an interview.Asked question is from Thermal Properties in portion Aggregates and Testing of Aggregates of Concrete Technology
Answer» The correct choice is (b) True Explanation: COEFFICIENT of thermal expansion and FIRE resistance both are RELATED to the HEAT content.

Discussion

49.	What is the standard value of expansion for super sulphated cement?(a) 10mm(b) 5mm(c) 1mm(d) .5mmThe question was posed to me in a national level competition.This interesting question is from Soundness of Aggregates topic in section Aggregates and Testing of Aggregates of Concrete Technology
Answer» Correct option is (b) 5mm To EXPLAIN I WOULD SAY: It is the standard value for super sulphated cement under IS:6909-1990.

Discussion

50.	When sand is fully dry then it’s volume is ____________(a) Equal(b) Less(c) More(d) Can’t sayI got this question in semester exam.This question is from Bulking of Aggregates in chapter Aggregates and Testing of Aggregates of Concrete Technology
Answer»

Discussion

Explore topic-wise InterviewSolutions in .

From the graph below, what is C?(a) Unloading(b) Loading(c) Permanent strain unrecovered(d) Resilient strain recoveredThis question was addressed to me in final exam.My doubt stems from Mechanical Properties of Aggregates topic in portion Aggregates and Testing of Aggregates of Concrete Technology

What is the size of fine aggregates?(a) 4.75mm(b) < 4.75mm(c) > 4.75mm(d) 12mmThe question was asked in an international level competition.Origin of the question is Classification of Aggregates topic in section Aggregates and Testing of Aggregates of Concrete Technology

What is the range of water absorption of aggregates used in road?(a) 2.5-2.9(b) .1-2(c) .1-2.5(d) 2-2.9The question was asked in an online interview.I want to ask this question from Testing of Aggregates topic in section Aggregates and Testing of Aggregates of Concrete Technology

What is the size of caliper?(a) 30cm(b) 50cm(c) 30mm(d) 40mmThis question was addressed to me during an interview.Question is taken from Soundness of Aggregates in portion Aggregates and Testing of Aggregates of Concrete Technology

The average specific gravity of natural aggregate is?(a) 2.7(b) 3(c) 1.5(d) 1I got this question in examination.This question is from Strength of Aggregates in section Aggregates and Testing of Aggregates of Concrete Technology

The unit weight of heavy weight concrete varies from __________ kg/m^3.(a) 1000(b) 2400(c) 2000(d) 1400This question was posed to me in a job interview.The query is from Strength of Aggregates in section Aggregates and Testing of Aggregates of Concrete Technology

Le Chatelier apparatus consist of ___________(a) Brass mould(b) Steel mould(c) Aluminum mould(d) Wooden mouldI have been asked this question in quiz.This interesting question is from Soundness of Aggregates topic in section Aggregates and Testing of Aggregates of Concrete Technology

For the construction of cement concrete floor, the maximum permissible size of aggregate is ________(a) 4.75mm(b) 8mm(c) 10mm(d) 15mmI got this question in class test.My question is based upon Source of Aggregates in division Aggregates and Testing of Aggregates of Concrete Technology

Natural aggregates come in which category?(a) Based on size(b) Based on origin(c) Based on density(d) Based on shapeThis question was posed to me in my homework.My enquiry is from Source of Aggregates in portion Aggregates and Testing of Aggregates of Concrete Technology

Generally angular aggregates are the example of natural aggregates.(a) True(b) FalseI had been asked this question in homework.My question is based upon Source of Aggregates topic in chapter Aggregates and Testing of Aggregates of Concrete Technology

What is the total percentage of aggregates in concrete by volume?(a) 50-60%(b) 60-75%(c) 85%(d) 50%The question was posed to me in examination.Origin of the question is Classification of Aggregates topic in portion Aggregates and Testing of Aggregates of Concrete Technology

According to geological origin, aggregates is/are classified into __________ types.(a) 1(b) 2(c) 3(d) 4I had been asked this question in a national level competition.My question comes from Classification of Aggregates in division Aggregates and Testing of Aggregates of Concrete Technology

According to IS: 2386 part-IV, each layer is tamped ________ times in crushing test.(a) 20(b) 25(c) 30(d) 10The question was asked during an interview.Question is taken from Testing of Aggregates in section Aggregates and Testing of Aggregates of Concrete Technology

How many principal thermal properties are there for aggregates?(a) 1(b) 2(c) 3(d) 4The question was posed to me during an interview.The above asked question is from Thermal Properties topic in chapter Aggregates and Testing of Aggregates of Concrete Technology

What is the maximum size of split?(a) 1mm(b) .5mm(c) 10mm(d) 2mmThe question was asked in an internship interview.Origin of the question is Soundness of Aggregates topic in chapter Aggregates and Testing of Aggregates of Concrete Technology

From the graph below, what is D?(a) Unloading(b) Loading(c) Permanent strain unrecovered(d) Resilient strain recoveredI got this question in a national level competition.Query is from Mechanical Properties of Aggregates in chapter Aggregates and Testing of Aggregates of Concrete Technology

Which apparatus we need to find soundness?(a) Le Chatelier(b) Vicat’s apparatus(c) CTM(d) Pat testThis question was posed to me at a job interview.I want to ask this question from Soundness of Aggregates topic in division Aggregates and Testing of Aggregates of Concrete Technology

The light weight aggregates are obtained from(a) Sedimentary rocks(b) Metamorphic rocks(c) Igneous rocks(d) Volcanic sourceI had been asked this question in an internship interview.The query is from Source of Aggregates topic in section Aggregates and Testing of Aggregates of Concrete Technology

What is the size of coarse aggregates?(a) 4.75mm(b) < 4.75mm(c) > 4.75mm(d) 12mmThe question was asked in quiz.This is a very interesting question from Classification of Aggregates topic in chapter Aggregates and Testing of Aggregates of Concrete Technology

Fine aggregate do not show any bulking when it is absolutely dry.(a) True(b) FalseThe question was asked in my homework.This intriguing question comes from Bulking of Aggregates topic in section Aggregates and Testing of Aggregates of Concrete Technology

A maximum value of _________ percent is allowed for WBM base course in Indian conditions.(a) 25(b) 35(c) 40(d) 50I had been asked this question during an interview.My question is based upon Testing of Aggregates in section Aggregates and Testing of Aggregates of Concrete Technology

The coefficient of thermal expansion affects the heat resistance.(a) False(b) TrueThis question was posed to me in an interview.Asked question is from Thermal Properties in portion Aggregates and Testing of Aggregates of Concrete Technology

What is the standard value of expansion for super sulphated cement?(a) 10mm(b) 5mm(c) 1mm(d) .5mmThe question was posed to me in a national level competition.This interesting question is from Soundness of Aggregates topic in section Aggregates and Testing of Aggregates of Concrete Technology

When sand is fully dry then it’s volume is ____________(a) Equal(b) Less(c) More(d) Can’t sayI got this question in semester exam.This question is from Bulking of Aggregates in chapter Aggregates and Testing of Aggregates of Concrete Technology