What type of gas is used to pressurize new ACR piping circuits for leak detection purposes?
A. oxygen
B. carbon dioxide
C. nitrogen
D. refrigerant
Answer: C
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What is a zoonosis?
What will be an ideal response?
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When competition exists, one species of wildlife will always increase in number as another decreases
Indicate whether the statement is true or false.
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The cross-sectional area of the weld groove is equal to ____.
A. the root opening times the bevel depth B. the plate thickness times the root gap C. one-half of the root opening times the bevel depth D. the groove volume times the weld length
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What is a disadvantage of cam-ground pistons?
A. Poor heat transfer. B. Can be damaged when cold if subject to heavy loads. C. They require reinforcement at the pin boss resulting in a heavier piston. D. Short service life.
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