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Propane and air are supplied to an internal combustion engine such that the air-fuel ratio is 16.1 when the pressure is 95 kPa and the temperature is 30°C. The compression ratio of the engine is 9.5.1. If the compression process is isentropic, determine the required work input for this compression process, in kJ/kg of mixture.
First consider highway driving. Assume a constant velocity of 27 m/s (60.4 mph) on level ground. Under these conditions the efficiency of the engine plus auxiliaries is 30 percent and the efficiency of the drivetrain is 85 percent. What is the fuel c..
A 2000 ft vertical curve connects to a +3% grade to a -5% grade. If the vertical tangents intersect at station 52+60.55 and elevation 877.62 ft, calculate the elavations at the VPC, VPT, high point and station 54+00.
A cube has side dimensions of 18.00 in. It is made of steel having a specific weight of 491 pcf. What force is required to hold it in equilibrium under mercury
An automobile traveling at 30 miles per hour on level pavement with a coefficient of kinetic friction of 0.6. Weighs 3,000 lb. Sixty percent of its weight is on the front axle and 40% on the rear axle.
Radon from well water may pose a radiological health hazard. One treatment technique is simply to hod the water in storage, allowing the radon to decay. The decay rate is first order:
A town is installing a new 10" main to carry drinking water. The only section remaining to be installed is a segment through the middle of town. However, the excavators discover an archaeological site.
for the retaining wall shown below determine the followinga whether the wall has adequate sliding resistance b whether
A rectangle channel 20 feet wide carries a discharge Q= 200cfs. Compute the critical depth and critical velocity for the flow in the channel.
A completely mixed activated-sludge plan is being designed for a wastewater flow of 3.0 mgd. The BOD of 225 mg/l is 200 mg/l soluble. The effluent soluble BOD requirement is 7 mg/l (70 percent of the total 10 mg/l).
Water flows from a ground storage tank that is 450 feet above a town's water distribution system. The pressure at the entrance of the system must be at least 75 psi and the demand is 1350 GPM.
A 250 cubic meter reaction tank contains a waste water having an ultimate BOD concentration of 755 mg/L. If the BOD reaction rate constant is -0.352/day, how much BOD is remaining after 12.0 days?
A pitot-static tube connected to a differential manometer measuring the fluid velocity in a pipe. what happens to the reading in the manometer, h, if the fluid velocity in the pipe is halved?
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