Question

According to IS: 2386 part-IV, each layer is tamped ________ times in crushing test.

(a) 20

(b) 25

(c) 30

(d) 10

The question was asked during an interview.

Question is taken from Testing of Aggregates in section Aggregates and Testing of Aggregates of Concrete Technology

Answer 1

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.