Instrumentation and Process Control Practice Test

To determine the change in temperature, you need to subtract the current temperature from the starting temperature. In this scenario, the starting temperature is 185°F, and the current temperature is 140°F.

Calculating the change in temperature involves this simple formula:

Change in Temperature = Starting Temperature - Current Temperature

Substituting the values gives:

Change in Temperature = 185°F - 140°F = 45°F

This computation indicates that the temperature has dropped by 45°F. Therefore, the correct answer reflects the actual calculated difference in temperature, demonstrating a clear understanding of how to measure changes in temperature accurately with a specific focus on basic subtraction in temperature readings.