2005级工程热力学考题(A卷)(外国英语资料).docVIP

2005级工程热力学考题(A卷) Documents from the network, I collected, finishing, and if there are omissions, errors, but also please correct me! Thermodynamic test questions of ring construction 2005 stage engineering (A volume) First, fill in the blanks (60 points) 1. (1 points) system in the absence of external influence, if the macro thermodynamic properties do not change with time, then the system is in a state 2. (1 points per empty) quasi-static process is a reversible process is a quasi static process without effect 4. (each 1 points, a total of 3 points) a gas storage container has a certain amount of the absolute pressure of 250kPa, if the air pressure is 0.1MPa, the pressure meter reading value is kPa If the vessel leaks, the reading of the pressure gauge is reduced to -100kPa, and the absolute pressure of the vessel is kPa, at which point the pressure is (above or below) the atmospheric pressure 5. (each 2 points, a total of 4 points) is a container filled with gas volume, pressure gauge readings, temperature of C, if the atmospheric pressure is, the quality of the gas in the container kg; if in the standard condition, the gas volume 6. (a total of 2 points), such as the average mass of the air under the temperature of 0~200, the specific heat is 200~500, and the average constant mass of the 0~500 is equal to the specific heat 8., the heat source A and B temperature are 500K and 300K, if the heat source A to the heat source B, the heat transferred is 570kJ Then the entropy change of heat source A and B is respectively, and the entropy production of the process is 8. (each 1 points, a total of 6 points) due to the presence of piston compressor clearance volume, the consumption of air compressor, gas, as the pressure ratio increases, the volume efficiency (fill in increase, change or reduced) If the 3 stage compressor is used, the initial pressure is the final pressure, then the optimum inter stage pressure is kPa 9. (each 2 points, a total of 4 points) of a steam tur