To pull a vacuum means to ____.
A. raise the pressure in a refrigeration system
B. lower the pressure in a refrigeration system below atmospheric
C. allow refrigerant to escape into the atmosphere
D. condense the gas in the system
Answer: B
You might also like to view...
The mean of a set of data is found by adding the numbers in a set and dividing by the number of numbers in the set.
Answer the following statement true (T) or false (F)
What are the disadvantages to the alkaline fuel cell (AFC) that make it more expensive to operate than other fuel cells?
What will be an ideal response?
What is the AHRI "A" performance testing condition for air cooled air conditioning equipment?
A) 90°F outside ambient, 85°F indoor dry bulb, 70°F indoor wet bulb B) 95°F outside ambient, 75°F indoor dry bulb, 75°F indoor wet bulb C) 95°F outside ambient, 80°F indoor dry bulb, 68°F indoor wet bulb D) 100°F outside ambient, 75°F indoor dry bulb, 72°F indoor wet bulb
The Modbus is a network that ________
A) Uses a master/slave communication technique B) Supports up to 64 devices C) Is a token-passing network D) Contains advanced interface converters