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Questions in engineering

[Free] What do you do if you see the evaporator coil covered with dirt, hair, or matted with foreign material? A. Clean the coils as best you can and move on. B. Run away. C. Ignore it and finish the job. D. Inspect the filters and recommend changing the filters and quote a deep coil clean.

[Free] Which of the following components may have failed if a large amount of frost is present on the evaporator coil? A. Defrost timer, liquid line solenoid, or space thermostat B. Condenser fan motor, compressor contactor, or defrost heater C. Defrost timer, defrost heater, or defrost thermostat D. Defrost thermostat, compressor motor, or oil regulator

[Free] A indicates foam with a more fluid consistency. A. longer drain rate B. shorter drain rate C. longer expansion rate D. shorter expansion rate Which of the following statements is correct?

[Free] Where would you look on a system for a TXV to determine if you use superheat or subcool as the charging method? A. Before the compressor B. Before the filter drier C. Before the evaporator D. Before the condenser

[Free] Activity: Docking With Wind or Current Toward the Dock How should you approach the dock? * The wind/current direction is toward the dock. * A. at a 90-degree angle, bow first B. at a 90-degree angle, stern first C. quickly and into the wind D. slowly and with the boat parallel to the dock

[Free] Which of the following devices can help visually determine the moisture content of the refrigerant? A. filter-drier B. sight glass C. accumulator D. crankcase heater

[Free] What must be done when a refrigeration system has automatic leak detection equipment installed? A. It must be primed with refrigerant prior to use. B. It must be replaced every three years. C. All sensors must be replaced monthly. D. It must be calibrated periodically.

[Free] Medium-temperature refrigeration systems are classified as having evaporators that operate in what temperature range? A. -10 °F to 32 °F B. 0 °F to 20 °F C. 20 °F to 40 °F D. 32 °F to 50 °F

[Free] What additional feature does tagging an entire group offer in Yammer? A. Muting notifications for group members B. Automatically archiving the conversation C. Inviting external experts to join D. Hiding the conversation from others

[Free] What is this thing right here