When should a technician record a system's baseline data?

A) Whenever the air filter is changed B) On a new system after it is installed
C) On an older system that is having problems D) Whenever refrigerant is added


B

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____ results from unburned or raw fuel

A. Carbon dioxide B. Oxides of nitrogen C. Hydrocarbons D. Carbon monoxide

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Hydronic heating can refer to both ____________________ and ____________________.

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

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The most well-known nineteenth-century proponent of the Renaissance was the Swiss historian

a. Peter Abelard. b. Duns Scotus. c. Jacob Burckhardt. d. Heiko Obermann.

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Which of the following is NOT a correct step in the creation of a block diagram?

A) Arrange the list of system components with outputs at the top and inputs at the bottom. The remaining items that are between outputs and inputs should be arranged in order alphabetically. B) Put all of the block diagram components from the list into rectangles. C) Connect the blocks with signal flow lines, based on the system operation. D) Make a list of all of the system components that would be replaced in the advent of a failure.

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