When Gathering Data for a Study Using Observational Methods,it Is

question 22

Multiple Choice

When gathering data for a study using observational methods,it is important for the data collector to:

• A) be observant of all that is done and said and unsaid.
• B) direct subjects by setting the stage through structured questions.
• C) record those actions and words that are related to the focus of the study.
• D) participate directly with subjects in order to better understand them.

Comprehend the basics of thermodynamics as applied to refrigeration and heating processes.

Identify the operational characteristics and requirements of refrigerant types R-12 and R-134a.

Recognize the function and components of an A/C system, including the role of the compressor and condenser.

Know the environmental impact of refrigerants, particularly the effects on the ozone layer.