A thermostatic expansion valve system operating with a refrigerant overcharge will have:
A) Higher temperature drop across the evaporator. B) A low superheat.
C) A high system subcooling. D) A low system subcooling.
C
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Which of the following is not explicitly part of the five-step process for establishing a new enterprise?
A. Refine the concept B. Determine the human resources required C. Identify opportunities D. Acquire preliminary resources
The old adage "you cannot teach old dogs new tricks" is well-founded and attempts to do so are a waste of time
A. True B. False
The thermal conductivity of a solid material can be determined using a setup similar to the one shown in the accompanying figure. The thermocouples are placed at 2.5 cm- intervals in the known material (copper alloy, K=52W/m·K) and the unknown sample as shown. The known material is heated on the top by a heating element, and the bottom surface of the sample is cooled by running water through the heat sink shown. Determine the thermal conductivity of the unknown sample for the set of data given in the accompanying table. Assume no heat loss to the surroundings and perfect thermal contact at the common interface of the sample and the copper.
In recent years, a soil test for nitrogen has been developed and widely used in humid regions in predicting how much nitrogen will need to be applied to supplement natural mineralization in the soil. This test is called the:
A) diagnosis and recommendation integrated system (DRIS). B) pre-sidedress nitrate test (PSNT). C) soil nitrogen partial analysis (SNPA). D) Differential Nitrate Extraction Test (DNET). E) Mehlich II nitrogen test.