NICET Soils level 1 | Questions and Answers with complete solution

Define C117 - The determination of the amount of material finer than a 75-um (No.200) sieve What is the significance of C136? - -To determine the grading of materials, -compliance of particle size distribution, -provide data for control of production of various aggregate -developing relationships concerning porosity and packing What procedure should always be used unless otherwise specified in c117? - Procedure A What is an appropriate wetting agent to use for sieving through a No.200 sieve? - Water or any dispersing agent that will promote separation of the fine materials What should the temperature of the oven be when drying samples?(C117) - 110 °C (+-5) If used, how much wetting agent should be used in procedure B? C117 - Enough to produce a small amount of suds when the sample was agitated Report the amount retained by wash by....?(C117) - <10%-report to the .1% >10%-report to the nearest whole number How long do you sieve material? C136 - so that not more than 1% of material retained on any sieve will pass during 1 minute of hand sieving How accurate shall balances be fo fine aggregate? C136 - readable to the nearest .1 Gram or .1% How accurate shall balances be for course aggregate or mixtures? C136 - readable to the nearest .5 gram or nearest .1%What is the significance of C117? - Accurate determination of material finer than 75-um in mineral aggregate by washing What practice is used for sampling aggregate? - D75 The investigation of potential sample material should be performed by....? D75 - A responsible, trained and experienced person What should a stockpile be visually inspected of? D75 - Discernable Variations Where shall a sample be obtained where practicable?D75 - From the finished product After a sample is obtained what shall not be done unless required for testing purposes? D75 - Further crushing or manual reduction