Good ventilation is important when working around refrigeration equipment because modern refrigerants ____.
A. are toxic and can poison you
B. have an unpleasant odor
C. are heavier than air and may displace the oxygen around you
D. both a and c
Answer: C
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If a _____ is burning out of control, leave the area immediately and call for help.
What will be an ideal response?
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All of the following diseases affect the nervous system except:
a. diabetes c. sclerosis b. aneurysm d. stroke
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The usual basis for association of plants into families is ________ characteristics
A) flower B) leaf C) root D) stem
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Technicians servicing an MVAC system should do any of these EXCEPT:
A) store refrigerant in a disposable container. B) wear safety goggles C) avoid direct contact with the refrigerant D) work in a well-ventilated area
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