Calculate the volume of soil that will be needed if the void

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1.A circular tube has an outside diameter of 150mm and an inside diameter of 100mm. If the allowable shearing stress is 55MPa, what is the allowable torque

2.If the BOD5 of waste is 327 mg/l, what sample size (in percent) should be selected to yield an oxygen consumption of 4.8 mg/l?

3.A 200,000 m^3 clay embarkment is to be constructed at an optimum water content of 16%. It is expected that 95% saturation will be attained. Calculate the volume of soil that will be needed if the void ratio of the fill material is 1.3

4.A -4% grade and a 0% grade meeting at sta. 24 + 40 and elevation 2421.54 ft are joined by an 800-ft vertical curve. The curve passes under an overpass at sta. 25+00. If the lowest elevation of the overpass is 2439.93 ft, calculate the available clearance.

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