A discrete-time system is described by the difference equation
7y[n] ? 3y[n ? 1] + [n ? 2] = 11.
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Most R-134a refrigeration systems use ________ oil for lubrication.
A) PAG B) SAE 30 C) POE D) Mineral
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Because air source heat pumps circulate less refrigerant at low ambient temperatures, the refrigerant not being used is stored
A) In a suction accumulator or charge compensator B) In a liquid receiver C) In the compressor crankcase D) In the metering device
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Properties considered in material selection include:
A) Thermal conductivity B) Corrosion resistance C) Strength D) All of the above
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Describe the purpose and operation of the park/neutral or clutch switch.
What will be an ideal response?
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