Civil Engineering MCQAE Level Civil Engineering
Los Angeles abrasion test measures:
Transportation EngineeringRoad MaterialsEASY
Choose the correct answer
A
Flakiness index of aggregate
B
Percentage wear of aggregate under impact and abrasion of steel balls in rotating drum
C
Specific gravity of aggregate
D
Bitumen adhesion
Correct Answer
B. Percentage wear of aggregate under impact and abrasion of steel balls in rotating drum
Why is this the answer?
LA test (IS 2386 Part IV): aggregate + steel balls in drum, 500 rev; % worn = (loss in mass/original mass)×100. Max % loss for surface course: 30% (bituminous), 35% (WBM); base course: 40%.
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This MCQ belongs to Magic Mock Test Series — UPSC ESE Civil (Paper II). Full tests include timed attempts, rank comparison and subject-wise analysis.