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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The following data file address for an input I/O instruction indicates that the input module is located in slot ____________________, and the field device is connected to terminal ____________________ I:2/5
Fill in the blank(s) with the appropriate word(s).
In theory, a mechanical seal should last until _____
a. the carbon face has worn away b. the spring wears out c. 40,000 shaft revolutions d. the seal faces separate
When is the best time to prune flowering plants?
What will be an ideal response?
____________________________ heat pumps utilize two coaxial heat exchangers, as compared to only one on the water-to-air configuration.
Fill in the blank(s) with the appropriate word(s).