Which condition can cause the air-conditioning system to produce less-than normal cooling?

A) Overcharged with refrigerant
B) Undercharged with refrigerant
C) Either undercharged or overcharged
D) Superheat condition


C) Either undercharged or overcharged

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The skill necessary to perform pipe welds in position is _____ that of welding on a plate.? ?  

A. greater than? B. less than? C. the same as? D. much less than?

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Describe the ISO metric and ASME M profile thread series.

What will be an ideal response?

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A refrigerant's safety rating is a combination of the toxicity letter and the:

A) Oxygen saturation. B) Flammability number. C) Freezing point. D) Pressure rating.

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Which of the following serves as the introduction to the NEC® and provides an overview of the book?

a. NEC Article 90 b. NEC Article 100 c. NEC Section 240.2 d. NEC Section 250.52

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