19. Changing the filter in a furnace or an air conditioner would be considered

a. a repair
b. a preventive maintenance measure
c. an adjustment
d. a diagnostic procedure

C?

I don't think it's c.

Yes. Changing the filter regularly protects the furnace parts from becoming clogged with dirt in the air.

To determine the correct answer, let's break down the options:

a. Repair - Changing the filter in a furnace or air conditioner is not typically considered a repair. Repair refers to fixing or replacing a faulty component to restore proper functionality.

b. Preventive maintenance measure - This could be a possible answer. Preventive maintenance involves taking proactive steps to prevent problems and prolong the lifespan of equipment. Changing the filter regularly is a common preventive maintenance practice to ensure optimal performance and efficiency of the furnace or air conditioner.

c. Adjustment - Adjustments involve modifying settings or fine-tuning components to achieve proper operation. Changing the filter is not typically considered an adjustment since it is a maintenance task rather than a calibration or modification.

d. Diagnostic procedure - Diagnostic procedures are used to identify problems or faults in the system. Changing the filter does not fall under this category since it does not involve troubleshooting or identifying issues.

Considering the options, the most appropriate answer is b. a preventive maintenance measure. Regularly changing the filter in a furnace or air conditioner helps prevent clogging, improves air quality, and allows the system to function efficiently.