If a Humidifier Is Used in a Central-Heating or Air

question 7

Multiple Choice

If a humidifier is used in a central-heating or air conditioning system, it is generally operated only when the ____.

• A) heat exchanger is in operation
• B) gas shutoff valve is open
• C) blower is in operation
• D) filter is clean

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Definitions:

Attitudes

A settled way of thinking or feeling about someone or something, typically reflected in a person's behavior.

Supervisor

An individual who oversees and directs the work of others, typically reporting to higher levels of management.

Emotions

Represents complex psychological states that involve a subjective experience, a physiological response, and a behavioral or expressive response.

Attitudes

Attitudes are psychological tendencies expressed by evaluating a particular entity with some degree of favor or disfavor.