Virtual Labs

The flakiness index of coarse aggregate is not conducted on sizes smaller then ___________ ?

a: 2.36 mm Explanation

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b: 4.75 mm Explanation

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c: 6.3 mm Explanation

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d: 5.5 mm Explanation

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What is the least dimension of a flaky aggregate that passes through 40 mm IS sieve and is retained on 25 mm IS sieve?

a: 18.1 mm Explanation

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b: 19.5 mm Explanation

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c: 15 mm Explanation

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d: 16.2 mm Explanation

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The average least dimension of flaky aggregate is less than ____?

a: 3/5 of its mean dimensions Explanation

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b: 4/5 of its mean dimensions Explanation

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c: 2/3 of its mean dimensions Explanation

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d: 5/6 of its mean dimensions Explanation

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Which apparatus is used to determine the flakiness index?

a: Length gauge Explanation

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b: 90 micron IS sieve Explanation

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c: Thickness gauge Explanation

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d: Pycnometer Explanation

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What is the effect of an excess of flaky particles on the workability of concrete?

a: Workability decreases Explanation

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b: Workability increases Explanation

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c: Both Explanation

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d: No effect Explanation

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Which of the following statement is correct?

a: Flaky aggregates are very thick and require less cement paste. Explanation

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b: Flaky aggregates have less thickness and require more cement paste. Explanation

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c: Flaky aggregates have a smooth surface and decrease the water/cement ratio. Explanation

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d: Flaky aggregates are smooth and have elongated sides. Explanation

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The thickness gauge slot opening width is typically ______ mm according to IS standards?

a: 5 Explanation

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b: 6 Explanation

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c: 8 Explanation

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d: 10 Explanation

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What is the range of aggregate sizes for which flakiness index testing is typically performed?

a: 4.75 mm to 40 mm Explanation

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b: 2.36 mm to 40 mm Explanation

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c: 6.3 mm to 50 mm Explanation

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d: 10 mm to 63 mm Explanation

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If an aggregate does not pass through the thickness gauge, it is classified as _____?

a: Elongated Explanation

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b: Not flaky Explanation

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c: Cubical Explanation

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d: Defective Explanation

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The flakiness index is calculated as the percentage of aggregates that pass through the thickness gauge relative to the _____ sample?

a: Total weight Explanation

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b: Dry weight Explanation

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c: Wet weight Explanation

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d: Initial weight Explanation

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Flakiness Index