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Test: Highway Materials & Testing- 2 - Civil Engineering (CE) MCQ


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10 Questions MCQ Test - Test: Highway Materials & Testing- 2

Test: Highway Materials & Testing- 2 for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Test: Highway Materials & Testing- 2 questions and answers have been prepared according to the Civil Engineering (CE) exam syllabus.The Test: Highway Materials & Testing- 2 MCQs are made for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Highway Materials & Testing- 2 below.
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Test: Highway Materials & Testing- 2 - Question 1

What is the weight of the charge used in the Los Angeles abrasion test?

Detailed Solution for Test: Highway Materials & Testing- 2 - Question 1

As per IS 2386 part 4, the steel balls are used as the charge for the test. They are of 48 mm diameter and each ball weighs around 416.67 g. Depending on the grading used for the test, the number of balls used changes.

Test: Highway Materials & Testing- 2 - Question 2

The following particulars are obtained after conducting the test for angularity number:
Volume of cylinder = 3000 g
Specific gravity = 2.68

What is the angularity number for the above sample?

Detailed Solution for Test: Highway Materials & Testing- 2 - Question 2

Angularity number is obtained using the formula, 

Where W represents the mean weight of aggregate (g),
C represents the volume of the cylinder (g) and,
Ga represents the specific gravity
From the readings, mean value, 


The angularity number is represented as a whole number and is rounded off to nearest one.

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Test: Highway Materials & Testing- 2 - Question 3

There are six types of tests to conduct the adhesion test on aggregates.

Detailed Solution for Test: Highway Materials & Testing- 2 - Question 3

The tests to determine the stripping value can be classified into six types. They are static immersion test, dynamic immersion test, chemical immersion test, immersion mechanical test, immersion trafficking test and coating test.

Test: Highway Materials & Testing- 2 - Question 4

The result for soundness test is expressed in terms of ______

Detailed Solution for Test: Highway Materials & Testing- 2 - Question 4

To conduct the soundness test, the aggregates are subjected to solutions of sodium sulphate or magnesium sulphate as per IS 2386. After cycles of immersion and drying, the loss in weight of aggregate is noted down in percentage and that gives the soundness result.

Test: Highway Materials & Testing- 2 - Question 5

The combined index is obtained by ______ the flakiness and elongation index.

Detailed Solution for Test: Highway Materials & Testing- 2 - Question 5

Combined index is obtained as the sum of both flakiness and elongation index. The sample is first subjected to flakiness test, then the non-flaky particles are subjected to the elongation test. Their indices are found out and added together.

Test: Highway Materials & Testing- 2 - Question 6

What is used as a charge in the Dorry abrasion test?

Detailed Solution for Test: Highway Materials & Testing- 2 - Question 6

Dorry abrasion test was used way back and is not used these days. The charge used for the test was sand. It was let into the machine to cause abrasive action. Crushed gravel cannot be used as it is the same material and it would cause attrition, not abrasion.

Test: Highway Materials & Testing- 2 - Question 7

After the abrasion test, the sample is passed through which sieve?

Detailed Solution for Test: Highway Materials & Testing- 2 - Question 7

The sample after removing from the abrasion machine is passed through 1.7 mm sieve and the weight is noted down. 2.36 mm is used in the impact and crushing test on aggregates.

Test: Highway Materials & Testing- 2 - Question 8

The aggregate impact test was conducted on a sample and the following readings were taken:
Weight of sample taken () = 350 g
Weight of sample passing 2.36 mm sieve () = 92 g
What will be the aggregate impact value for the sample?

Detailed Solution for Test: Highway Materials & Testing- 2 - Question 8

The aggregate impact value is obtained as the ratio of the weight of sample passing 2.36 mm sieve to the weight of the sample taken for the test. For the readings in the question, the aggregate impact value can be found out as

and is expressed as a whole number in percentage.

Test: Highway Materials & Testing- 2 - Question 9

Which of the below test – procedure pairs are matched correctly?

Detailed Solution for Test: Highway Materials & Testing- 2 - Question 9

As per IS 2386 part 3, in the impact test, the sample is filled in three layers and given 25 tamping each. As per IS 2386 part 1, the sample is filled in three layers and tamped 100 times each for the angularity number. As per IS 2386 part 3, in the bulk density test, the sample is filled in three layers and given 25 tamping each. As per IS 2386 part4, the sample for crushing test is filled in three layers and tamped 25 times each.

Test: Highway Materials & Testing- 2 - Question 10

The polished stone value of an aggregate is reported as the ______ of the two values of ______

Detailed Solution for Test: Highway Materials & Testing- 2 - Question 10

There are two stages conducted for this test. The sample is polished in the first stage and subjected to pendulum type friction tester in the second stage. The result obtained is the skid number and the mean of two values of the same is taken as the polished stone value.

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