Q1.What is the primary purpose of soil-compaction testing?

Q2.When performing a compaction test on a sandy soil, (a) what mold should you use and (b) how many tamper blows per layer are required?

Q3.What is the overall objective of density testing? 

Q4.In the sand-displacement method of density testing, the sand is calibrated to determine its bulk density. Why must you do this before each test?

Q5.The California bearing ratio (CBR) test measures the capacity of a soil to resist what type of force?

Q6.Of the cements discussed in the TRAMAN, which one is most sulphate resistant?

Q7.When the cement paste in a concrete mix does not bond with the aggregate particles, what is the probable cause?

Q8.When a concrete mix contains an excessive amount of silt or clay, what surface defect may occur when the concrete is placed?

Q9.As related to aggregate used in concrete, define the term surface moisture.

Q1O.What is the primary reason for adding an air-entraining agent to a concrete mix?

Q11.Define the term hydration as it applies to concrete.

Q12.In concrete flexural-strength testing, when should you use the formula R = 3Pa/bd²?

Q14.To identify an unknown bituminous material what is the first field test that you should perform?

Q15.To distinguish the type and determine the approximate grade of an unknown asphalt cutback, what laboratory test should you perform?

A11. The chemical reaction between cement and water that causes a concrete to harden.

A12. When the test specimen breaks outside the middle third of span length by less than 5 percent.