When testing the efficiency of a (10 seer are lower) air cooled condenser, the refrigerant condensing temperature should be no more than higher than the entering air temperature.

Which of the following is an example of how telecommunication devices people do their jobs? a.) a security guard checks the time using a digital watch. b.) a banker does some quick math using a solar calculator. c.) a nurse uses a digital thermometer to take a patient’s temperature. d.) a construction worker reports in to his office using a cell phone.