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1.The compressive strength of concrete has a (population) mean of 2500 psi and a (population) standard deviation of 50 psi. Find the probability that a random sample of n= 5 specimens will have a sample mean strength that falls in the interval from 2490 psi and 2510 psi.
2.Determine the dimensions of the best hydraulic trapezoidal concrete channel section to convey water at a rate of 2200 gal per min on a channel slope of 0.015 m/m.
Estimate of the point load strength index Is(50) and suggest a realistic range for the Youngs modulus E.
Constructing the foundation causes changes in the levels of vertical stress at all points in the soil. One such point lies at the centre of the footing plan, and is at a depth of 10 m. Determine the increment of vertical stress there.
Specify a device describing briefly its principle of operation, that is typically installed downstream of a bursting disc as an indicator of disc rupture,
Determine the arrival rate assuming that it is unchanged over the duration of the observation period. An approach to a pretimed signal with a 60second cycle has nine vehicles in the queue at the beginning of the effective green.
An undisturbed soil sample was collected in a sampling tube of internal diameter 5cm. The length of the extracted sample was 10.2 cm and its mass was 360 g. After oven drying the mass reduced to 326.5 g.
What is the maximum length of trench that can be excavated by hand economically rather than by a trenching machine. It will cost $900.00 to transport a trenching machine to the job and back to the storage yard.
Determine the horizontal distance, given:Stadia Top=8.5 ,Stadia Bottom 6.21, vertical angle= -8 degrees 42 minutes.
A 250 mm- diameter and 16 m-long timber pile is driven into a sandy soil where f= 18 kN/m3 and f' = 34 degree. Estimate the maximum load allowed on the pile with a safety factor of 2.5.
you have been selected to assist the structural engineer for a bridge replacement project. your task is to design the
A flat plate weighing 220 N slides down a 15 degree incline with a velocity of 2.5 cm/sec. A thin film of oil with a viscosity of 1.29 N.sec/m^2 separates the plate from the ramp. if the plate is 50 cm by 75 cm, calculate the film thickness in cm.
Calculate the area of a circular tract of land which has a radius of 30 meters using the mathematical formula, Trapezoidal Rule, and Simpson's Rule. Compare your results. Use an offset of 5 meters.
A section of a road has a superelevation of .6% and a curve of 600ft radius. What speed limit will you recommend at this section of the highway
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