Liquid refrigerant should always be recovered first from chillers:
A) To ensure that all the oil is removed from the compressor.
B) To keep from freezing the water in the chiller tubes.
C) To prevent the removal of refrigerant oil with the refrigerant.
D) To ensure the best mixing of refrigerant and water during recovery.
B
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The first step in starting a chilled-water system is to ____.
A. activate the compressor unloading system B. establish the chilled-water flow C. activate the condenser heat removal system D. start the compressor operation sequence
In RC and RL integrators and differentiators, transient time is equal to the:
A) time constant times five. B) pulse width times five. C) pulse width. D) time constant.
Stakes used for batter boards must be braced if they extend above ground level by _____
a. 2 feet or more b. 3 feet or more c. 4 feet or more d. 5 feet or more
What type of material is part number 104 made from?
Refer to Drawing Numbers T6592ML R0, T6593ML R0, and T6594ML R0.