A system has been evacuated and the gauge valves have been closed. A slight increase in pressure after a short time indicates _________________
A) Air in the system
B) Refrigerant in the system
C) A leak in the system
D) None of these
C) A leak in the system
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Determine the length of pipe needed in a 90-degree offset (centerline-to-centerline) of 38” with a take-off of .60” per fitting side.
What will be an ideal response?
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Human use of energy most likely started with the hominid species, _______________ who lived between 1.8
million and _______________ years ago.
What will be an ideal response?
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What is the largest environmental problem stemming from agriculture?
A) air pollution B) soil erosion C) insect control D) sunlight
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Insulin is a result of research conducted with:
A) cats B) dogs C) primates D) hamsters
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