An inclined water manometer is used to ____.
A. determine the level of vacuum while evacuating a refrigeration system
B. determine natural gas and liquified petroleum gas pressures
C. measure the operating pressure in the low side of a refrigeration system
D. determine air pressures in very low-pressure system
Answer: D
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Which of the following is an equipment hazard associated with compressors?
A. Inadequate lubrication B. Cold working conditions C. Exposure to hazardous materials D. All of the above
The number of mild (minor to very minor) earthquakes occurring on the earth is almost
A) 1 or 2 per year. B) 10 to 20 per year. C) 100 per year. D) 1,000 per year. E) several thousand per year.
Are USDA-soil and water conservation measures involuntary?
Indicate by YES (Y) or NO (N).
Ice storage systems _______________________________.