When using hand signals, always _____
A) stand on something at least two feet in height
B) wear reflective gloves
C) maintain eye contact with the operator
D) make sure you can hear the backup alarm
Answer: C
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Each course should be aligned before proceeding to the next course.
Answer the following statement true (T) or false (F)
A(n) ____________________ is a general term that is used to refer to either a regular feature of size or an irregular feature of size.
Fill in the blank(s) with the appropriate word(s).
When soldering, why should flux be used?
A. It helps prevent oxidation. B. It helps keep pipes clean. C. It helps solder flow easier. D. All of the above are correct.
Mechanical codes limit the amount of refrigerant a system can contain if it is located in an occupied space. Because VRF systems are connected to one large refrigerant network that would release the entire charge in case of a leak, some codes limit refrigerant 410A charge to ________ pounds per 1,000 cubic feet of space
A) 25 B) 50 C) 30 D) 15