Which of the following actions cannot help to prevent moisture contamination of a refrigeration system?
a. Evacuating the system before starting it up
b. Installing a filter-drier
c. Plugging piping that is exposed to the atmosphere
d. Using thicker copper tubing
d. Using thicker copper tubing
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M = D - 1.5155P + 3W. Solve for D.
A. M + 1.5155P - 3W B. M -1.5155P + 3W C. M -1.5155P - 3W D. M +1.5155P/ 3W
Find the length of arc AB in the accompanying figure. All dimensions are in inches.
A. 1.090 in B. 3.980 in C. 4.090 in D. 5.110 in
The requirement that foundations must be built in excavations that are "in the dry" means that _____.
a. water cannot be applied during compaction b. the excavations must be free of water c. work must be stopped on rainy days d. groundwater barriers must be installed
The compound motor connection that should generally be avoided is the _____.
A. cumulative B. differential