Which of the following is a main component of a typical A/C system?

The compressor is a main component of a typical air conditioning system because it plays a crucial role in the refrigerant cycle. Its primary function is to compress the refrigerant gas, which increases its pressure and temperature. This compressed refrigerant is then circulated through the system, allowing it to absorb heat from the indoor air and release it outside through the condenser. The effectiveness of the entire cooling process relies on the compressor's ability to maintain proper pressure and flow of the refrigerant.

In an A/C system, the compressor is often referred to as the "heart" of the system, as it enables the movement of refrigerant through the evaporator and condenser coils, facilitating heat exchange. Without the compressor, the air conditioning system would not function. In contrast, electric heaters, boilers, and water pumps are not central to the standard operation of a typical air conditioning unit, as they serve different purposes related to heating and water circulation, rather than cooling.