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Question
When conducting CBR test, it is observed that the load dial reading at 2.5 mm penetration is 33 divisions, if the one division represents 190 kg load in the calibration chart, what is the CBR at 2.5 mm penetration?
A.
3.6
B.
5.6
C.
4.6
D.
2.6
Answer ( Option C)

4.6

Solution

Given data: 
The load dial reading at 2.5 mm penetration = 33 divisions 
One division = 190 kg load 
Sustained load at 2.5 mm penetration = 33 × 190 = 6270 kg 
At 2.5 mm penetration:
 

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