Loose connectionsincrease resistance → causeoverheating, which isvisible in thermal scans.
Step 2: Analysis of Each Option
A. Locating areas of high power factor❌Incorrect→Power factor is measured with power meters.
B. Reading current-carrying capacity of conductors❌Incorrect→Measured using ammeters and engineering data.
C. Locating a loose electrical connection✅Correct→Loose connections causeheat buildup, easily detected with thermal scans.
D. Measuring the load on a refrigerant system❌Incorrect→Refrigerant loads are measured usingpressure sensors and flow meters.
Thus, the correct answer isC. Locating a loose electrical connection.
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