What is the correct definition of a gas?
A. Anything that has weight and mass and occupies space.
B. A substance that has definite volume and sufficient mechanical strength to maintain a constant shape.
C. A substance that has neither definite volume nor definite shape.
D. A substance that has definite volume but does not have definite shapes.
Answer: C
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A) TCM B) Pressure control valve C) PCM D) Any of the above terms, depending on application
Contactors make or break a set of contacts that controls the voltage applied to some load in cooling systems.
Answer the following statement true (T) or false (F)
Types of communications include ________
A) Written B) Nonverbal C) Verbal (talking) D) All of these
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a. SO2 b. NO2 c. CO2 d. O3 e. CO