In regards to the two piston compressor what causes the intake read valve to open?
A. Spring pressure
B. The camshaft
C. Differential pressure
D. Crankshaft rotation
Answer: C
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What is the science of friction and lubrication known as?
A. physics B. tribology C. chemistry D. engineering
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If V? = 8?30° V in the circuit of Fig. 9.59, find Vs.
 FIGURE 1.png)
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On a commercial refrigeration system with electric defrost, what does the compressor do during the defrost cycle?
A) It runs backwards to pump hot gas into the evaporator. B) It shuts off. C) It operates to provide the heat for defrost. D) It cycles like it normally would.
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Communication in its most primitive form is nothing more than transferring information between transmitter and receiver across a(n) ________
Fill in the blank(s) with correct word
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