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1.Air at 37 psi and 60oF is being forced into a tire at a velocity of 180 ft/s through a ¼ in. diameter opening. The tire has a volume of 17 ft3. Determine the rate of change of density in the tire. (3.01 *10-5 slugs/ft3 s)
2.A centrifugal water pump has an impeller with r1 = 4”, r2 = 12”, ?1 = 160°, ?2 = 170°. The impeller is 2” wide at the inlet end and ¾” at the outlet. For a speed of 1800 rpm, neglecting losses and vane thickness, determine the discharge (in ft3/sec) for shock-less entry (?1 = 90°), the Torque and the angle, ?2 at the exit for the first problem in degrees.
3.An air compressor is used to pressurize a cylindrical tank which contains air at atmospheric pressure. The tank’s diameter is 3 ft and it is 5 ft long. The supply line is 1 inch in diameter. The air compressor’s output pressure is a constant 80 psi at 90oF with a 10 ft/s velocity. The tank’s temperature stays at a constant 70oF. Determine the time required for the tank pressure to reach 50 psi. (995 s or 16.58 min)
Pure n-butane is contained in a laboratory cell in which the volume can be varied. The cell is maintained at a temperature of 200°F. The volume is changed until a few drops of liquid n-butane are present. What is the pressure in the cell
Describe the given types of bonding agents found with clay minerals. a) hydrogen bond b) covalent bond c) van der walls forces d) james bond e) ward bonds f) war bonds.
A car weighing 4000 pounds strikes the stopping barrier depicted below head on at a speed of 70 mph. The stopping force in the barrier is a function of how far the car penetrates into the barrier.
Plot the magnitude of the force exerted on the gate by the brace as a function of the angle of the gate, , for . Assume the weight of the gate is negligible.
A 100ft tape is calibrated at 68 degrees F, fully supported with 15 Ibs of tension and found to be 99.987 ft long. Is this tape is used fully supported with 15 Ibs of tension at 86 degrees F to measure a distance that is recorded as 136.48 ft,
A truck is designed to measure concrete roughness. During a typical test the driver will bring the vehicle to a constant test velocity, v, and then suddenly lock the brakes bringing the vehicle to a complete stop.
A centrifugal pump is used to pump Vodka (S.G. 0.8) at a rate of 20 gallons per minute to the top of a 30 foot tall tank. The owner wants to use the same pump to pump orange juice (S.G. 1.1). Explain how this change in fluid will affect:
Raw primary sludge at a solids concentration of 4% is mixed with waste activated sludge at a solids concentration of 0.5%. The flows are 20 and 24 gal/min, respectively. What is the resulting solids concentration
A rapid sand filter has a loading rate of 8.00 m/h, surface dimension of 10m x 8m, an effective filtration rate of 7.70 m/h, and a production efficiency of 96 percent.
Determine the factors of safety against sliding and against overturning, and also the soil pressure at the heel and toe. Assume hydrostatic uplift varies uniformly from full hydrostatic head at the heel of the dam to zero at the toe. consider 1m l..
A sewer pipe is to be laid from station 10+00 to station 13+20on a -1% grade, starting with invert elevation 326.32ft. at 10+00.Calculate invert elevations at each 50ft station along line.
at s=0 the driver applies the brakes hard enough to cause the car to skid. Assume that the car keeps sliding until it stops, and assume that throughout this process acceleration is a= -7.4556. compute the car's stopping distance and time.
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