Weak current College】 【the air conditioning with cooling technology law questions and answers 1-Power By】 【China power house network.

<br> A, judgement (picture of growth, the wrong picture-H) <br> 1. in the same initial, final State, the irreversible process of change is greater than the amount of reversible processes of change. (x) < .br> 2. reversible process must be permitted static process. (∨) <br> 3, for the opening of the refrigerants of enthalpy represented as refrigerant flow and the total energy of the transfer. (x) <br> 4. compressor suction .outlet steam quality smaller vent steam quality volume. (x) <br> 5, wet steam, the greater the dryness x, wet steam from dry saturated vapor line distance. (x) <br> 6, the refrigerant vapor pressure and temperature is .a one-to-one relationship between. (x) <br> 7. low temperature heat source, the lower the temperature, the higher the temperature of the high temperature heat, refrigeration cycle refrigeration, the higher the coefficient. (x) < .br> 8, isobaric process variable exponent n = 0. (∨) <br> 9, adiabatic process in the system and the outside world without heat exchange processes of variation in entropy Δ S = 0. (∨) <br> 10, .ideal gas, energy and gas temperature, quality is directly proportional to the volume. (x) <br> 11, thermal processes in the power of the size and procedure independent of the way, just the initial, final State. (x) < .br> 12, gaseous refrigerant condensers condense liquefaction process is fixed temperature constant pressure process. (∨) <br> 13, the first law of thermodynamics is the essence of the conservation of energy. (∨) <br> 14, reversible heat engine .efficiency higher than non-reversible heat engine efficiency. (x) <br> 15, although non-equilibrium system is not balanced State, but its status is OK. (x) <br> 16, spontaneous process is not reversible and non- .spontaneous process is reversible. (x) <br> 17, as long as no volume change, external devices may not work. (x) <br> 18, the same latent heat of vaporization of azeotropic with pressure increases and decreases. (∨ .) <br> 19, describes the physical state of the system is known as the state parameter. (∨) <br> 20. system from one State to start experiencing a series of state changes and return to the initial state, the closed thermal .cycles known as thermal process. (∨) <br> 21, liquid at any point within the static pressure has nothing to do with the role of surface orientation. (∨) <br> 22. in order to overcome local resistance and consumption of .quality fluid mechanical energy, called along the losses. (x) <br> 23, different diameter, different physical properties of fluids in the critical Reynolds number flow velocity is basically the same ReC. (∨) <br> 24, works on Reynolds .number ReC to identify fluids flowing, Re <2000 to turbulence. (x) <br> 25, the size of the heat transfer and heat proportional to temperature, and heat resistance inversely. (∨) <br> There are 26, heat .conduction, convection and radiation heat transfer in three ways. (∨) <br> 27, hydrostatic pressure distribution and container shapes and sizes. (x) <br> 28, unit volume and the quality of the fluid has called the severe fluid. .(x) <br> 29, fluid density ρ countdown is fluid quality volume υ. (∨) <br> 30, fluid flowing in the pipeline. Along the Canal radial branch into many flow velocity layers, Centre, maximum pipe wall velocity is .zero. (∨) <br> 31, fluid at any point within the direction of the size of the static pressure. (x) <br> 32, fluid flow layer resulting in internal friction is sticky. (∨) <br> 33 ., to the level of outside pressure energy equivalent to liquid internal transfer in all directions. (∨) <br> 34, table pressure on behalf of a fluid in the actual pressure at the point. (X) <br> 35, table pressure .is absolute pressure and local atmospheric pressure. (X) <br> 36, fluid loss and along the length of the pipe, also known as proportional to the length of the loss. (∨) <br> 37, hot and cold two fluids .in direct contact with a heat exchanger is called mixed-type heat exchanger. (∨) <br> 38, R717 refrigerant R12 is a high temperature and low pressure, refrigerant. (X) <br> 39, freon in destroying the atmosphere's ozone .layer. (X) <br> 40, mixed refrigerant has azeotropic solution and non-azeotropic solution. (∨) <br> 41, freon is chemically stable, not combustion and explosion, no corrosion of metal, insoluble and oil. (X .) <br> 42, the Montreal Protocol developed in 2030, deactivate the excessive sexual material HCFCs. (∨) <br> 43, binary solution of the constant pressure of vaporization process is the cooling process, but its constant pressure condensation process is the .warming process. (X) <br> 44, absorption refrigeration uses refrigerants "on", a boiling point lower substance known as absorbents, boiling substances known as refrigerants. (X) <br> 45, brine of solidification temperature with its salt quality .score increases. (X) <br> 46, refrigeration compressors used in the refrigeration oil cannot be used in place of the universal engine oil. (∨) <br> 47, N32, viscosity grade national standard refrigeration oil equivalent of the old standard .18, refrigeration oil, (growth) <br> 48, substances belonging to the CFC R12, R22, belonging to HCFC substances substances belonging to the HFC R134a. (∨) <br> 49, CFC, HCFC substances on atmospheric ozone is due .to the damage, and type of material to the HFC ozone is due to the destructive effect. (∨) <br> 50, market sale of so-called "non-fluoride refrigerator" is no freon refrigerator as refrigerants. (X) < .br>.