Which of the following microfarad values indicates a good start capacitor rated at 145-175 mfd?

A start capacitor rated between 145-175 microfarads (mfd) is designed to provide the necessary boost of electrical energy to start the compressor motor in an air conditioning system. The correct answer, which is 160 mfd, falls perfectly within this specified range.

This means that a reading of 160 mfd indicates a capacitor that is functioning properly and can supply the necessary capacitance to assist in motor start-up. Capacitors are often tested for their microfarad rating to ensure they are operating within the manufacturer's specifications, which is key to maintaining the efficiency and performance of the HVAC system.

On the other hand, readings like 130, 180, or 190 mfd can indicate that the capacitor is either below the required specification or significantly above it, which could result in inadequate starting assistance or potentially damage to the compressor motor due to excessive voltage or current. Thus, it is crucial to select a capacitor that meets or is within the recommended range to ensure reliable operation of the air conditioning system.