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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 user will interact with a PC running HyperTerminal.
(a) The tension in the crane's cable when the hull is submerged in the water, and (b) The tension when the hull is completely out of the water.
a hot wire anemometer is a device to measure the velocity of a flow of air. it consists of a thin cylindrical wire in
the truck at b is used to hoist the cabinet up to the fourth floor of a building using the rope and pulley arrangement.
A tensile test was conducted on a mild steel bar. The following data was obtain from the testi. Dia of the steel bar= 3 cmii. Gauge length of the bar = 20cmiii. Load at elastic limit=250kNiiii. Extension at a load of 150 kN= .21mmv. Minimum load =380..
Determine the observed F value. Compare it to the critical table F value and decide whether to reject the null hypothesis. Perform a t test for independent measures on the data. Compare the t and F values. Are the results different? Use a = .05.
pushing a book against the wall.you are holding a book against a vertical wall by pushing upwards with your hand. the
Explain the principle of operation of an AB encoder and how this is used to read an optical encoder. Draw a diagram of the essential features of an optical encoder.
Two previously undeformed cylindrical specimens of brass are to be strain hardened by reducing their cross-sectional areas (while maintaining their circular cross sections). For one specimen, the initial and deformed radii are 17 and 12 mm, respectiv..
The two should be equal. Explain why this is so. Can you relate the viscous drag force and the wall shear stress to this energy result?
Consider two closely coiled helical springs, one made of steel, the other of copper, each 0.01m in wire diameter, one fitting with in the other. Each has an identical number of coils, n=20, and ends constrained to deflect the same amount.
carbon monoxide and water vapor react to form carbon dioxide and hydrogen. water at 25c is fed to the reactor 50 in
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