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Determine the total induction length, from the point of intake entry of the tract to the head of the inlet valve, to optimize the wave ram effect at the following engine speeds: 2000, 3000, and 4000 rev/min. The crank angle for the pressure wave to travel through the tract form end to end and back again is ?t. Assuming an average values for ?t to be 85 degrees, and the velocity of sound in air to be C =330 m/s. Plot tract length (mm) versus engine speed from 1000 to 8000 rev/min.
determine the smallest allowable value of the coefficient of static friction between the collar and the rod if the collar is not to slide when a) a =15° b)a = 45°. Indicate for each case the direction of the impending motion.
a belt driven machine has a moment of inertia 240 ft-lb-sec2. the belt tensions differ by 80 lb as the belt passes over
Explain why metals are ductile and ceramics are brittle, in terms of their dislocation motion. Draw 2 pictures to sequentially show an edge dislocation gliding through a crystal, using dots to represent the atoms. Draw 2 pictures to show how a disloc..
muddy meadows earthmoving can purchase a bulldozer for 80000. after 7 years of use the bulldozer should have a salvage
two shafts whose axes are 8.5 in. apart are to be coupled together by standard spur gears with an angular velocity
A Stirling cycle operates with 1 kg of air between thermal energy reservoirs at 27oC and 527oC. The maximum cycle pressure is 2000 kPa and the minimum is 100 kPa. Assuming constant specific heat at room temperature,
in a tensile test for an alloy used for ballistic-missile launch tubes on boomer submarines the yield strength was
which emits more sox per unit amount of electricity produced a coal-fired plant with a 90 efficient so2 scrubber or an
A 74 wt% Ni-26 wt% Cu alloy is heated to a temperature within the ? + liquid phase region. If the composition of the phase is 80 wt% Ni, using figure 10.3
what is the pressure differeence between the inside of a soap bubble and the atmosphere for a 3 inch diameter bubble?
a copper-nickel alloy of composition 60 wt ni-40 wt cu is slowly heated from a temperature of 1000degc 2370degf. what
what is the suction specific speed for the pump that is operating under the conditions given in problem 14.16? is this
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