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An eight-cylinder, four-stroke diesel engine of 229 mm bore. 304 mm stroke, and compression ratio 14/1, has an output of 375 kW at 750 reviling. The volumetric efficiency is 78%, the mechanical efficiency is 90%. and the air-fuel ratio is 25/I. If the impel for the pumping loop is 0.345 bar, calculate the impel for the working loop. The engine is now fitted with an exhaust-driven turbo-blower which delivers air to the cylinders at 1.43 bar. The compression ratio is reduced to 13/I and the measured volumetric efficiency is 102%. It can he assumed that the exhaust pressure remains constant and equal to 1.011 bar, and that the imp of the main loop ts directly proportional to the mass of air induced. Calculate the hp which can be expected if the speed and mechanical efficiency remain the same. Compare the specific fuel consumption for the outcastes. if the air-fuel ratio for the supercharged engine is Mt, I. The air conditions are 1.013 hat and 15°C.
The blade on a snowplow turns the wet snow through an angle of 120- but off to one side at 30-. If the snow has a density of 500 kg/m3, what power is needed to move the blade at 40 mi/h if it scoops snow that is 15-cm deep and 3-m wide?
a 5.00in wide x .25in thick flat steel plate steps down to a width of 2.50in and is subjected to axial force. there is
Quarterly demand for flowers at a wholesaler are as shown. Forecast quarterly demand for year 5 using: 1. simple exponential smoothing with α=0.1 2. using Holt's model with α=0.1 and β=0.1
You are asked to measure the viscosity of an emulsion, so you use a tube flow viscometer, with the container open to the atmosphere. The length of the tube is 10 cm, its diameter is 2mm, and the diameter of the container is 3 in.
how did computers impact the field of engineers and technologiststechnicians? what future implications do you see
Sketch a dislocation loop in the form of a circle and specify the Burgers vector. Show portions of the dislocation that are screw-like and those that are edge-like in nature. Considering the energy per unit length of the screw dislocation being somew..
An ideal vapor-compression refrigeration system operates at steady state with Refrigerant 134a as the working fluid. Superheated vapor enters the compressor at 30 lbf/in2, 20F, and saturated liquid leaves the condenser at 140 lbf/in2. The refriger..
Determine the required force and moment components at the grip, A, necessary to do this. Establish axes at the rod's center of mass G, with + z upward, and + y directed along the axis of the rod toward A.
If the building and storm windows are at 20 and -10oC, respectively, what is the rate of heat loss by free convection across the air space?
If the crest of a hill has a radius of curvature i = 200ft, determine the maximum constant speed at which the car can travel over it without leaving the surface of the road. Neglect the size of the car in the calculation. The car has a weight of 3500..
a stream of humid air containing 1.00 mole water vapor and the balance dry air is to be humidified to a water content
an automobile having a mass of 2 mg travels up a 7 degree slope at a constant speed of v100 kmh. if mechanical friction
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