Use the convolution integral to find:


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In ____________________ heat or hidden heat, heat is known to be added, but no temperature rise is noticed.

Fill in the blank(s) with the appropriate word(s).

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A pesticide with a _____________________ of more than two to three weeks may have the potential to cause groundwater contamination

Fill in the blank(s) with correct word

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The best way to diagnose an ECM motor is to:

A) Turn off power to the unit, remove the control harness, and connect a test controller. B) Turn off power to the unit, remove the control module, and ohm test the motor. C) Leave power on to the unit and check for voltages at the harness. D) Turn off power to the unit, remove the control harness, and ohm test the lead end to end.

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Match each item with the correct statement below.

A. Thin-walled copper piping is rarely used in the HVAC industry B. Thick-walled copper piping is used for heavy-duty applications C. Drain, waste, and vent piping is commonly used in the plumbing industry D. Air conditioning and refrigeration piping is commonly used in the HVAC industry E. Medium-walled copper piping is the most frequently used

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