Which of the following is considered a natural or normal roof opening?
A. Parapet
B. Skylight
C. Soffit
D. Fire stop
Answer: B. Skylight
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Five basic functions must be performed in the operation of small business to move a product or service from the supplier to the consumer
Indicate whether the statement is true or false
You can use an open flame where the air has a heavy concentration of refrigerants.
Answer the following statement true (T) or false (F)
The branch-circuit ____________________ current is the current to be used in sizing branch-circuit conductors, disconnects, controllers, branch-circuit, short-circuit and ground-fault protection.
Fill in the blank(s) with the appropriate word(s).
A periodic signal has a fundamental period of 4 seconds.
(a) What is the lowest positive frequency at which its CTFT could be nonzero? (b) What is the next-lowest positive frequency at which its CTFT could be nonzero?