ME 3310 Midterm: me3310test1summer13
31 Jan 2019
School
Department
Course
Professor
Document Summary
Problem 1: (30 points) calculate the absolute pressure in the tank above the water surface. The barometric (atmospheric) pressure is 30 in hg. (answer: p = 217 kpa) Problem 2: (40 points) a piston encloses 1 lbm of water in an initial volume of 0. 3 ft3. The piston leaves the stops at a pressure of 150 psia. The water is heated from its initial state to a final temperature of 400 f. Show the process on a p-v diagram with respect to saturation lines. Evaluate the work done by the h2o. (answer: w = 81. 5 btu) Problem 3: (30 points) air with a mass of 1 kg and initially at p = 101. 3 kpa and t = 300 k is contained within a cylinder as shown. The cup on top of the piston is then filled at a constant rate until it contains 50 kg of water, thus compressing the air.
