If the suction valve in a reciprocating compressor is leaking slightly, the ____.
A. cooling capacity will be reduced
B. flow rate of refrigerant through the system will increase
C. compressor can overheat
D. both a and c
Answer: D
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The development of electric trolleys in the late 19th century transformed the American city by
A. transforming the American city into a compact and communal "walking city." B. enabling cities to build upward as well as outward. C. separating the mass transportation of the working class from the private vehicles of the wealthy. D. enabling cities to plan streets along regular grid lines. E. creating distinct districts devoted to residential neighborhoods, commerce, and industry.
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Positive shutoff fittings allow technicians to reduce the amount of which of the following?
A) Refrigerant spray when connecting to a refrigeration system B) The amount of refrigerant coming into the hoses C) Liquid in the unit during evacuation D) Refrigerant spray when disconnecting from a refrigeration system
A digital waveform that repeats itself at a fixed interval is called a periodic waveform
Indicate whether the statement is true or false