A typical loading pattern for a ceiling with storage is ____ lb.
A. 25
B. 30
C. 35
D. 40
Answer: B
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Which of the following is true with regard to circuit breaker interrupting capacity ratings?
a. NEMA tests are certified by unbiased reviewers. b. UL tests now include NEMA ratings. c. The interrupting capacity of a circuit breaker is the same for all voltage levels. d. UL tests are self-certification.
Sub-arc welding can utilize either solid or tubular filler metal
Indicate whether the statement is true or false
Communication, PID, safety, and combination are all examples of ____________ modules.
A. output B. input C. specialty D. fixed
How does air from air-conditioning vents affect open display cases?
A) Open display cases are not affected by external air sources because of their powerful built-in air curtains. B) Open display cases are not affected by external air sources because of their engineered air baffles. C) It improves their performance by lowering the temperature of the air surrounding the display case. D) It disrupts the case's air curtain, causing them to rise in temperature.