When evaluating multiple alternatives or projects, against what must they be compared, if they are (a) independent, and (b) mutually exclusive?
What will be an ideal response?
(a) The DN alternative (b) Each other
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When cutting ____________________ diameter pipe, the torch tip is always pointed toward the center of the pipe.
Fill in the blank(s) with the appropriate word(s).
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Is it ever appropriate to use an open flame to test for a gas leak?
What will be an ideal response?
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IDENTIFY TEST PROCESS SYMBOLS AND DIAGRAMS
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To manually defrost a frozen evaporator coil, technicians should:
A) Use any available sharp object to chip away ice from the coil. B) Use a heat gun to accelerate the melting of the ice. C) Chip away the ice from the coil using a tool designed for chipping ice. D) Spray the ice with liquid refrigerant, which will boil and melt the ice.
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