An air compressor is equipped with an intercooler and an after cooler to __________.

Correct Answer: Option C — increase compressor efficiency and economy

Intercoolers and aftercoolers remove the heat of compression, which reduces the specific volume of the air. This allows for more efficient multi-stage compression and prevents excessive temperatures that could degrade lubricating oil or cause carbon deposits. Cooling the air also promotes moisture condensation, improving overall system efficiency and air quality.