A graphical representation of the steps and operations in a process is a:
A) Pareto. B) root cause. C) flow chart. D) cause-and-effect.
C
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Adding a small can of sealant to the A/C system is a good preventive measure to stop leaks.
A) True B) False
Which of the following states has adopted OSHA-approved state safety plans?
A) Connecticut B) New York C) New Jersey D) All of the above
A) What is the efficiency of the compressor? B) If the refrigerator is required to produce 300 kJ/min of cooling, what is the required flow rate of refrigerant in mol/min? C) What is the coefficient of performance of the refrigeration cycle?
A refrigerator operates using the vapor-compression cycle. The steady-state refrigeration cycle and the physical properties of the refrigerant are summarized here: ? A boiler produces saturated vapor at P=0.03 MPa and T=5 °C, which has a specific enthalpy of 30 kJ/mol. ? The vapor is compressed to P=0.09 MPa. The ACTUAL temperature of the gas leaving the compressor is T=35 °C. ? The vapor is then condensed into saturated liquid at P=0.09 MPa, which has a specific enthalpy of 15 kJ/mol. ? The liquid enters a valve and experiences a pressure drop to P=0.03 MPa. ? The refrigerant then enters the boiler. The ideal gas heat capacity can be considered constant at CP*=15R.
The start capacitor is removed from the circuit of a CSCR compressor by:
A) A centrifugal switch. B) A high-pressure switch. C) A potential starting relay. D) The start capacitor does not drop out on a CSCR compressor.