Why are the stubs on compressors and filter driers more difficult to braze than copper pipe?
A) They have a thin copper coating that is easily oxidized by overheating.
B) They are difficult to get to.
C) They are typically made of aluminum which is much harder to braze.
D) It is easy to burn a hole in the compressor or drier shell.
A
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The term "acre" was brought to the United States from which country?
a. France c. Italy b. Germany d. England
Which of the following statements is true?
A. In an isobaric system, no flow work can be added or removed, because flow work is equal to PAv and in an isobaric system P=0. B. In a closed system, no flow work is added or removed, because no material is entering or leaving the system. C. In applying the equation W_EC= -??PdV, the P always stands for the pressure inside the system. D. In applying the equation W_EC= -??PdV, the P always stands for the pressure outside the system. E. None of the above are true.
Which type of diesel injection produces less noise?
A) Common rail B) Indirect injection (IDI) C) Distributor injection D) Direct injection
Inductive probes make __________ conductivity measurements.
A. low B. high