A defrost system that pipes the compressor discharge vapor directly to the evaporator is called a(n) ____________________ type.

Fill in the blank(s) with the appropriate word(s).


hot gas defrost

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Main sewers are installed with ____________________ to define the alignment and slope.

Fill in the blank(s) with the appropriate word(s).

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In __________________ preventive maintenance methodology _________________________.

The law requires technicians to recover refrigerant from all refrigeration systems so that they ____.

A. will not be released into the atmosphere B. may be used again C. may be reclaimed for future use D. all of the above

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Which of the following is not true regarding assembly drawings?

A. Assembly drawings have few overall dimensions. B. Assembly drawings generally do not contain hidden lines. C. Assembly drawings must call off each part that is used to make up the assembly. D. Assembly drawings should list only general information for purchased parts.

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