In a standard refrigeration cycle, the main purpose of the valve is: a. To liqui
ID: 2078727 • Letter: I
Question
In a standard refrigeration cycle, the main purpose of the valve is: a. To liquify the working fluid b. To vaporize the working fluid c. To remove heat from the working fluid d. To add heat to the working fluid e. To make the working fluid stronger f. To add unnecessary cost to the system can be removed An ideal gas is heated in a closed, rigid container. Which of the following is true? a. T_2/T_1 = P_1/P_2 b. T_2/T_1 = (P_1/P_2)^n/c_P c. T_2/T_1 = 1.0 d. T_2/T_1 = V_1/V_2 e. None are true Consider a process which occurs in a closed, rigid, well-insulated vessel with negligible potential and Kinetic energy effects. There is a shaft into the vessel. Which of the following is true? a. v_1 = v_2 b. u_1 = u_2 c. S_1 = S_2 d. a and b e. a and c. f. b and c. g. a, b and c In the standard refrigeration cycle: a. A COP of 1.0 is better than 1.5. b. The working fluid pressure is lowest in the condenser and highest in the evaporator c. The working fluid undergoes an isentropic process as it passes through the value d. The temperature of the working fluid in the evaporator must be below that of its immediate surroundings e. None of the above For a reversible Isothermal process in a closed system a. Q = 0 b. Delta T = 0 c. sigma > 0 d. a and b e. a and cExplanation / Answer
1)option b is correct.
The main purpose is to vaporize the fluid. It removes the pressure from liquid, so that it vaporizes easily.