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1.Discuss how the NEC3 form of contract provides stimulus to good management and compare and contrast this where possible with other forms of contract
2.Water flows through a 75 mm constriction in a horizontal 150 mm pipe. If the pressure in the 150 mm section is 345 kPa and that in the constriction 207 kPa, calculate the velocity in the constriction and the flowrate.
3.The sports car has a mass of 2.3 Mg and accelerates. at 6m=s2, starting from rest. If the drag resistance on the car. due to the wind is F D = (10v) N, where v is the velocity in m/s,. determine the power supplied to the engine when t=5s. the engine has a running efficiency of e=.68
A steel rod to which three disks are attached is shown below. The rod is fixed against rotation at its left end, but free to rotate in a bearing at its right end. Each disk is 300mm in diameter.
The contractor ran out of gunite mixture and finished the deep corner of a 5-m-wide swimming pool, with a quarter circle pipe of PVC pipe, . compute the horizontal and vertical forces on the curved panel AB.
Air at 90 psia and 70 degrees F flows through a 4.5 inch diameter welded steel pipe (e = 0.00015) at 60 lb/min. Find the friction head loss and pressure drop in 200 ft of this pipe. Assume the air to be of constant density.
A rectangular tube has an outside dimensions that are 2in wide and 4in deep and a wall thickness of 0.25in. The tube is acted on by a bending moment of 12,000lb-in. A.)Determine the maximum tensile and compressive bending stresses.
Explain the difference between materials considered to have “homogeneous” and “isotropic” material properties. Give examples of materials that are considered isotropic but not homogeneous and others that are considered homogeneous and anisotropic.
A mass of 5 kg of saturated liquid-vapor mixture of water is contained in a piston-cylinder device at 125 kPa. Initially, 2 kg of the water is in the liquid phase and the rest is in the vapor phase
A piston-cylinder device contains helium gas initially at 150 kPa, 20 degrees C, and 0.5 m^3. The helium is now compressed in a polytropic process (PV^n = constant) to 400 kPa and 140 degrees C. Determine the heat loss or gain during this process.
Water under a gage pressure of 350kPa flows with a velocity of 5 m/s through a right-angled bend that has a uniform diameter of 250 mm
A 40-mm-diameter jet has a velocity of 25 m/s. If this jet were to strike a large flat plate normally, what would be the resultant force on the plate?
1.5-kg collar is attached to a spring and slides without friction along a circular rod in a vertical plane. Knowing that the tension in the spring is70 N and the speed of the collar is 3.8 m/s as it passes through point A,
A nozzle is shaped so that the velocity of flow varies linearly from base to tip. Assuming quasi-one-dimensional flow, what is the convective acceleration midway if v-base= 1 ft/sec, v-tip = 4 ft/sec, and L=18"
Assume the 20 percent of the annual precipitation reaches the watershed outlet as stream flow. Determine the mean stream flow rate in ac-ft/yr, sfd/yr, and square meter/second
A groundwater has an alkalinity of 200 mg/L as CaCO3.Assume that all of the alkalinity is bicarbonate. Express thisbicarbonate concentration in units of meq/L, moles/L, and mg/L.
A Class I rural highway segment of 10 miles in level terrain has a base free-flow speed (BFFS) of 65 mph. The cross section has 12-ft lanes and 6-ft clear shoulders on both sides of the road.
If the defect rate for the flash drivers is 0.5% and you randomly select four of them for inspection: a) What is the probability that none of them has a defect b) What is the probability that all four have a defect
A saturated sample of clay with an sl 20 has a natural water content of 32%. What would its dry volume be as a percentage of its original volume of Gs.= 2.67.
A two post in ground car lift uses compressed air to force water under two aluminum pistons that move in unison (both pistons at same elevation) to raise and lower the vehicles.
For a temperature of 10 degree C, calculate the time needed for the following particles to settle 0.3m: a) a 20um mineral particle with a specific gravity of 2.1, and b) a 2 um organic particle with a specific gravity of 1.2
The 75 lb block is released from rest 5 ft above the plate. Determine the compression of each spring when the block momentarily comes to rest after striking the plate.
Calculate Earth's gravitational force on the Shuttle astronauts while orbiting at an altitude of 220 miles (or 354 km) above Earth's surface.
In a water table aquifer bounded on the ends by rivers, the hydraulic conductivity is 50 m/day. The hydraulic heads at x = 0 and x = 1000 m are 100 m and 90 m, respectively.
A 48-in water main carries 79 cfs and branches into two pipes at point A. The branching pipes are 36 and 20 in. in diameter and 2800 and 5000 ft long, respectively. These pipes rejoin at point B and again form a single 48-in.
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