To prevent cave-ins, sloped or tiered walls may be used for trenches less than _____
a. 10' deep
b. 15' deep
c. 20' deep
d. 25' deep
c
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Vertical fiber-optic cable should be clamped every _____.
a. 3' to 6' b. 9' to 12' c. 15' to 18' d. 21' to 24'
Livestock producers contend that almost all livestock produced in the United States come from ____________________-owned farms and ranches
Fill in the blank(s) with correct word
Answer the following statement(s) true (T) or false (F)
1. The work of the modern electrician requires a knowledge of National Electrical Code® requirements that govern three-phase motor installations and the ability to apply these requirements to installations. 2. NEC® Article 430.52 Exception 1 states that if the values for branch-circuit protective devices as determined using the percentages in Table 430.52 do not correspond to the standard device sizes or ratings, then the nearest smaller size rating or setting should be used. 3. When the conductors of a feeder supply two or more motors, the required wire size is determined using Code rules. 4. Wire types and sizes are selected by the ambient temperatures of the place of installation and the economics of the total installation, such as the minimum size of conduits, cost of the wire sizes, and labor cost for installing the various selections. 5. The NEC® guides an electrician through the main components of the calculation, thus providing all the information that is necessary for a motor installation.
What should be done to treat frostbite to the skin?
What will be an ideal response?