Which of the following provides a curved surface for the cable to follow as it passes from the tray?
a. Swivel plate
b. Splice plate
c. Dropout plate
d. Barrier plate
c. Dropout plate
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Which of the following is required when hoisting materials with a crane?
a. There can’t be any wind during the lift. b. The material must be wrapped in a tarp. c. There must be a certified rigger present to direct the lift. d. Cranes can be used only for lifts of two or more stories.
What is an advantage of electronic service information?
A) Information may be printed out for future reference B) Internet access allows multiple user access C) Both A and B D) Neither A nor B
Why is electricity distributed using extremely high voltages?
A) For safety because the insulation on the electrical distribution lines is not as effective at lower voltages. B) Higher voltages are easier to generate than lower voltages, so distributing them as a high voltage reduces equipment and saves money. C) To keep current as low as possible and reduce loss through the lines. D) High voltage electricity travels faster than lower voltage electricity and can get from one side of the country to the other in seconds.
A relay is essentially a switch that is operated by a magnetic coil.
a. true b. false