Some hybrid air conditioning systems use an electrically driven compressor that uses a special lubricant. What precaution should be taken when servicing these systems?

A) A dedicated recycling machine for the HEV B) A special gauge set
C) Extra refrigerant filters D) Low pressure pump


A

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In terms of their ability to resist water penetration, did the thick exterior masonry walls used in historic buildings behave as reservoir walls or face-sealed walls? Explain.

What will be an ideal response?

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One way employee motivation can be measured is by examining the _____.

a. quantity of compliments b. record of safety compliance c. number of employee complaints d. frequency of labor negotiations

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The subsequent problems deal with the circuit below where all voltage sources are dc and the circuit is assumed to be in steady state. Also, R1 = R2 = R3 = R4 = R.The voltage across the capacitor is

A. V1 B. 0 C. V2 ? V3 D. V2 + V3 E. V1 + V2 ? V3

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How many faces or edges are parallel to the picture plane in three-point perspective?

a. One b. Two c. Three d. All four e. None

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