What happens to CFCs and HCFCs that are exposed to a flame?
What will be an ideal response?
They chemically decompose when exposed to flames or very high temperatures, releasing their chlorine and fluorine. This creates highly irritating and potentially toxic gases, including chlorine gas, fluorine gas, and phosgene gas.
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Find, in inches, the length of 3/4” plate needed to form this circular drain pipe.
Which type of turnbuckle should not be used for rigging?
a. Eye and eye b. Eye and jaw c. Jaw and jaw d. Hook and hook
____________________ are forces that oppose each other.
Fill in the blank(s) with the appropriate word(s).
What is the common operating voltage range on the cells of electronic air cleaners?
A) 6,000 to 10,000 volts DC B) 120 to 240 volts AC C) 25,000 to 50,000 volts DC D) 480 to 600 volts DC